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AdTech Software Development: Custom DSP, SSP, Ad Server and Programmatic Platform Development for Ad Tech and Martech Companies

Updated October 2026 · Written and maintained by the Progression Agency strategy team

Ad tech software development is the design, build and operation of the systems that buy, sell, serve and measure digital advertising: bidding engines, supply and yield tools, ad servers, exchanges, audience data services and the reporting and billing behind them. It is for ad tech and martech companies, publishers and media owners, agencies and brands building in-house tools, and founders launching an advertising product, and it produces a platform that answers partners on time, spends budgets exactly and reconciles every impression to an invoice. Progression Agency is based in New York City and works with clients across the United States and worldwide.

On this page · 16 sections
  1. What is adtech and how does it work?
  2. Which adtech platforms do we build, and who commissions them?
  3. Adtech software development services, from first sketch to on-call
  4. Programmatic advertising platform development: the modules a bidding platform needs
  5. Adtech architecture: building for latency, volume and money
  6. Privacy, consent and identity built into the platform
  7. Supply chain transparency: ads.txt, app-ads.txt and sellers.json
  8. Video, connected TV and header bidding modules
  9. Martech software development next to adtech
  10. Build, buy or extend an ad platform?
  11. Ad tech consulting before a single line of code
  12. How ad tech platform development runs, phase by phase
  13. What drives adtech software development cost?
  14. How do you choose an adtech development company?
  15. How do AI assistants answer questions about ad tech software development?
  16. Related services

The short answerAn adtech development company scopes the platform type and its partners, designs a low-latency architecture, builds a minimum viable product against one real traffic source, then adds integrations, measurement and billing before load and security testing. Success is measured in responses returned inside each partner’s time limit, pacing accuracy, discrepancy rates against partner counts, uptime and infrastructure cost per million requests. Consent and opt-out signals are designed in from the first sprint. Progression publishes no custom software price: every build is quoted after a written scope, and the timeline is agreed phase by phase.

Specifications, rules and product facts are described as published by IAB Tech Lab, IAB, IAB Europe, the California Attorney General, the European Commission, the FTC, Google, the Media Rating Council and the named open-source projects, read in October 2026; they change, and this page is general information, not legal advice. Progression publishes no custom software price; every build is quoted after a written scope.

What is adtech and how does it work?

Adtech is the software that moves an ad from a buyer’s budget to a person’s screen and proves it was seen. In a programmatic sale, the publisher’s side offers an impression, the buyer’s side prices it, an auction picks a winner, an ad server delivers the creative, and measurement tools count what happened, all in the moment the page or app loads.

The adtech landscape in one table: the main system types
SystemWhich side uses itWhat it doesWhat a build has to get right
Demand-side platform (DSP)Advertisers and agenciesEvaluates bid requests and bids on impressions for campaignsBid decisions inside the timeout, budget pacing, targeting
Supply-side platform (SSP)Publishers and app ownersOffers inventory to many buyers and manages floors and rulesYield logic, demand partner connections, supply transparency
Ad exchangeBoth sidesRuns the auction between supply and demandFair auction logic, throughput, clean logging
Ad serverPublishers or advertisersDecides which creative to show and records deliveryDecisioning rules, counting, pacing
Ad networkBoth sides, through an operatorPackages inventory from many sites or apps for saleInventory quality, payouts, reporting
Data management or customer data platformMarketers and platformsBuilds audiences from first-party and partner dataConsent-aware segments, identity inputs, retention rules
Consent management platformPublishers and appsShows the privacy notice and records the person’s choicesSignal formats partners can read
Measurement and attributionAdvertisers and publishersCounts impressions, clicks and outcomes and assigns creditDeduplication, reconciliation, honest models

If you are an advertiser looking to buy media through a bidding platform rather than build one, that is the work of our programmatic advertising agency team; this page is for the companies that build and run the platforms themselves.

Buy: Bidding platforms. Bid on impressions for advertisers.
Sell: Supply and yield tools. Package and price publisher inventory.
Serve: Ad servers. Pick the creative and count the impression.
Match: Exchanges and networks. Run the auction between both sides.
Know: Audience and data tools. Segments, consent, identity inputs.
Prove: Measurement and billing. Reports, attribution, invoices.

Why does the adtech landscape look so crowded?

Each step in that chain can be a separate company, and many sell to each other. A publisher may use one vendor for consent, another for header bidding, a third for ad serving and several supply partners at once. That fragmentation is why integration work, not the core algorithm, takes most of the calendar on a typical build.

Where the money moves

Every impression carries a price, and every party takes a fee, a margin or a subscription. Platform software therefore has two jobs: making decisions fast enough to win the right impressions, and keeping records exact enough that invoices, payouts and partner reports agree at month end.

Which adtech platforms do we build, and who commissions them?

We build the buy-side, sell-side and serving software described above, plus the data, measurement and admin tools around it. Most commissions come from one of five kinds of company, and each one starts from a different problem.

Adtech platforms by buyer: who commissions which build
Who is buildingTypical platformUsual triggerFirst milestone
Ad tech startupA bidding or supply product for a nicheA founder with a pricing or data insightOne live partner with real traffic
Established ad tech vendorA new module or a rebuild of an old serviceCost per request too high, or a stalled roadmapParallel run beside the old system
Publisher or media ownerAn ad server, yield tool or direct-sold marketplaceFees to intermediaries, or data kept in-houseDirect campaigns served from the new stack
Retailer or commerce siteSponsored listings and on-site ad placementsA new revenue line from supplier brandsOne placement type, one advertiser portal
Agency or brandTrading desk tooling, reporting, creative workflowToo much manual work across platformsA single report that replaces spreadsheets

Bidding platforms for the buy side

A demand-side platform (DSP) receives bid requests, decides which campaigns are eligible, prices the impression and answers before the exchange stops waiting. DSP development is mostly about that decision path and the budget controls behind it; we keep the advertiser’s media-buying questions on the programmatic buying page and focus here on the engineering.

SSP development and publisher yield tools

On the sell side, a supply-side platform (SSP) connects a publisher’s inventory to many buyers, applies floors and block lists, and passes supply chain information buyers now expect. Supply side platform development also covers the dashboards a publisher uses to see which partners pay and which only add latency.

Ad server development and ad decisioning

An ad server decides which creative appears in a placement and records that it did. Ad server development covers the decisioning rules (priority, targeting, pacing, frequency), the creative store, the counting pipeline and the trafficking screens an ad operations team uses all day.

Ad exchange development and ad network development

An exchange runs auctions between many buyers and sellers; a network aggregates inventory and resells it under its own terms. Ad exchange development puts the weight on auction rules, throughput and logging that both sides can audit, while ad network development adds publisher onboarding, payouts and inventory quality controls.

Retail media and commerce ad placements

A retailer selling sponsored product and display placements on its own site and app to the brands it stocks needs more than an ad server. Retail media platform development joins an ad server to the product catalog, the search results page and the retailer’s sales data, so suppliers can see what their ads sold.

Campaign management, trafficking and reporting tools

Not every build is a bidder. Many companies need ad management software development: order entry, creative approval, trafficking to several platforms through their APIs, and one reporting layer that replaces exports and spreadsheets.

Adtech software development services, from first sketch to on-call

Our adtech software development services cover consulting, architecture, product engineering, integrations, data and reporting, testing and the run phase after launch. You can hire the whole path or one piece, such as an architecture review or a single partner integration.

  • Ad tech consulting and discovery: partners, volumes, rules, success measures, and a build, buy or extend recommendation
  • Architecture and system design: service boundaries, data flow, storage choices, failure behavior and cost model
  • Ad tech MVP development: one platform type, one partner, one format, running on real traffic
  • Partner integrations: exchanges, supply partners, measurement vendors, consent tools and identity inputs
  • Data pipelines, reporting and billing: event streams, aggregates, dashboards, invoices and payouts
  • Admin and trafficking interfaces: campaign setup, creative approval, user roles and audit trails
  • Load, security and failover testing before each traffic increase
  • Run and improve: monitoring, on-call support, performance tuning and new specification versions

Adtech development services for an existing platform

A large share of adtech development is not greenfield. We take over services that have outgrown their first design, migrate them to new infrastructure, add a module such as a new ad format, or untangle a reporting pipeline that disagrees with partners.

Adtech product development for founders

For a new company, adtech product development starts with the narrowest product that proves the business: one buyer type, one supply source, one pricing idea. We keep that first version honest about what it cannot do yet, so investors and early customers see real traffic rather than slides.

Advertising software development around the platform

Advertising software development also includes the pieces around the core: advertiser self-serve portals, publisher onboarding, creative tools, invoicing and the internal tools an operations team needs. These often decide whether a platform can grow without hiring a person per customer.

Programmatic advertising platform development: the modules a bidding platform needs

Programmatic advertising platform development is a set of modules that each fail in their own way. The table and lists below are the checklist we start every scope from, trimmed to the platform type you are building.

Process map in seven steps from an incoming bid request to spend reconciliation.Process map in seven steps from an incoming bid request to spend reconciliation.
Editorial process map, not measured data.
Core modules of a programmatic platform and what breaks without each one
ModuleWhat it doesWhat goes wrong without it
Bid request intakeParses partner requests, validates fields, rejects malformed trafficCrashes or silent drops under load
Eligibility and targetingMatches campaigns to the request by geography, device, inventory and audienceWasted bids and missed impressions
Bid decisioningValues the impression and picks the creativeOverpaying, or losing every auction
Budget pacingSpreads spend across the flight and stops at the capBudgets gone by noon, or never spent
Frequency cappingLimits how often one person sees one campaignAnnoyed audiences and wasted spend
Creative managementStores, approves and serves ad files and tagsBroken ads and rejected creatives
Event loggingRecords wins, impressions, clicks and conversions once eachReports that disagree with partners
Reporting and attributionAggregates events into the numbers clients pay onDisputes at invoice time
Billing and reconciliationTurns counted delivery into invoices and payoutsRevenue leakage and manual month-end work
Invalid-traffic filteringScreens out bots and suspicious traffic before and after the bidPaying for impressions nobody saw
Admin and trafficking UILets operations teams set up and change campaigns safelyEngineers doing campaign setup by hand
APIs and integrationsConnects partners, clients and internal toolsEvery new partner becomes a custom project

Real time bidding software development: answering on time

Real-time bidding lets a single impression be put up for bid as the page or app loads. In OpenRTB 2.6 the tmax field gives the maximum time in milliseconds the exchange allows for bids, including internet latency, and a late answer is simply ignored. RTB software development is therefore built backwards from that limit: what can be computed in advance, what must be read from memory and what is never allowed on the request path.

Bid request handling and OpenRTB

OpenRTB is the IAB Tech Lab’s open protocol for the automated trading of digital media, developed from 2010 by supply and demand technology companies. Version 2.6 dates from November 2022 and uses AdCOM 1.0 lists; version 3.0, from April 2022, arrived with the companion Advertising Common Object Model (AdCOM). We support whichever version your launch partners send, with an adapter for each partner’s extensions.

Budget pacing, frequency caps and the cost of a wrong count

Pacing decides how fast a campaign spends; capping decides how often one person sees it. Both depend on shared counters that many servers update at once, which is where most overspend incidents start. We design those counters so a slow or failed service makes the platform bid less, never more.

Invalid-traffic filtering as a module

Filtering runs before the bid, using block lists and request checks, and after it, using patterns in the event logs. The Media Rating Council publishes Invalid Traffic Detection and Filtration Guidelines, with an IVT 2.0 addendum updated in June 2020; we build the hooks that verification vendors and your own rules plug into.

Billing, reconciliation and discrepancy handling

Two systems counting the same campaign rarely agree to the impression. The platform needs its own event of record, a daily comparison with each partner’s numbers and clear rules for which count an invoice uses. Building that early saves weeks of month-end arguments later.

Ready to scope an ad platform build?Send the platform type, the partners it must connect to and the volume you expect in year one. You get a free proposal with a written scope, a phase plan and the questions we still need answered, with a same-business-day reply.

Get a free proposal

Adtech architecture: building for latency, volume and money

Adtech architecture is the design of a system that handles a very large number of small, time-limited requests while money moves through it. The right shape keeps the request path short, pushes heavy work to streams and batch jobs, and makes every failure safe for budgets.

Adtech architecture layers and the questions each one answers
LayerCommon building blocksQuestion we answer in the scope
Edge and request pathStateless services in a compiled or JIT language, regional deploymentHow close to each partner must we run?
Fast stateIn-memory key-value stores for budgets, caps and profilesWhat must be readable in a few milliseconds?
Event streamingA distributed log such as Apache KafkaHow do wins, impressions and clicks reach every consumer once?
Analytics storageA column-oriented database such as ClickHouseWhich reports must be fresh, and which can wait an hour?
Batch and modelsScheduled jobs, feature stores, bid modelsWhat can be computed ahead of the request?
Control planeAdmin APIs, campaign database, user rolesWho can change what, and how is it audited?
ObservabilityMetrics, logs, traces, alertingWhich alerts mean money is at risk right now?

Low-latency services on the request path

Anything a bid needs is prepared before the request arrives: campaign lists, targeting indexes, model outputs. The request path reads from memory, computes a price and answers. Database calls, synchronous calls to other teams’ services and heavy logging stay off that path.

Streaming data pipelines

Apache Kafka is an open-source distributed event streaming platform, and it or a managed equivalent is a common backbone for ad events. The design choices that matter are partitioning, ordering, retention and how each consumer recovers after a crash without double counting.

Event storage and reporting

Delivery data is wide, append-heavy and queried by time and dimension, which suits analytical databases. ClickHouse describes itself as a column-oriented SQL database management system for online analytical processing; similar engines exist, and we pick by query shape, team skills and hosting preference.

Horizontal scaling and cost per million requests

Traffic in adtech arrives from partners, not from your own users, so it can double when one partner turns on a new region. We track infrastructure cost per million requests from the first load test and design autoscaling, request sampling and partner throttling so growth does not arrive as a surprise invoice.

Observability that maps to money

Dashboards show bid rate, win rate, timeout rate, spend against pace and discrepancy by partner. Alerts fire on the conditions that cost money, such as a campaign spending faster than plan or a partner’s timeout rate rising, rather than on every server metric.

An ad platform has to read, store, respect and pass on people’s privacy choices on every request. We build platforms inside the rules below; this section is general information, not legal advice, and your counsel decides how each rule applies to you.

Privacy rules and signals an ad platform has to handle
Rule or signalWhat it isWhat the platform does with it
GDPR (EU)EU law on personal data; cookie IDs, IP addresses and phone advertising identifiers can be personal dataReads consent signals, limits processing to what was agreed, supports deletion
CCPA as amended by CPRA (California)Gives people the right to opt out of the sale or sharing of personal informationStops sale and sharing for opted-out users and keeps that state
Global Privacy ControlA browser setting or extension that sends an opt-out signal to sitesTreats the signal as an opt-out where the law requires it
IAB Europe TCFA voluntary industry standard for recording and passing consent choicesParses consent strings and checks vendor permissions
IAB Tech Lab GPPA protocol carrying privacy, consent and choice signals from sites and apps to vendorsReads the sections for each jurisdiction
COPPA (United States)FTC rule on collecting personal information from children under 13Keeps child-directed traffic out of targeted bidding

GDPR and EU traffic

The European Commission’s GDPR guidance lists an IP address, a cookie ID and a phone’s advertising identifier as examples of personal data, and says the law reaches companies outside the EU that offer goods or services to people in the EU or monitor their behavior. Under the regulation, consent has to be freely given, specific, informed and unambiguous, which is why the platform stores what each person agreed to, not just that a banner was shown.

CCPA, CPRA and opt-out preference signals

The California Attorney General’s CCPA page explains that sharing means sharing for cross-context behavioral advertising, that people may opt out of sale and sharing, and that a user-enabled global privacy control must be honored by covered businesses as a valid request. CPRA amended the CCPA rather than replacing it, with its provisions in effect from January 1, 2023. Coverage depends on thresholds such as more than $25 million in annual gross revenue or buying, selling or sharing the personal information of 100,000 or more California residents or households.

IAB Europe’s Transparency and Consent Framework is a voluntary standard; version 2.3 launched in April 2025, and participants had until February 28, 2026 to adopt it. IAB Tech Lab’s Global Privacy Platform carries strings for the IAB Europe TCF, the IAB Canada TCF, a US national string and a number of US state strings in one container. A platform built today parses both and records which version arrived.

Identity after the Privacy Sandbox retirement

On October 17, 2025, Google said it would retire several Privacy Sandbox technologies, including Topics, Protected Audience and the Attribution Reporting API on Chrome and Android, citing low adoption, and that Chrome keeps its current approach of offering users a choice about third-party cookies. Identity inputs therefore stay plural: first-party IDs, contextual signals and frameworks such as UID2, whose component source code is public and which people can opt out of at any time through its Transparency and Control Portal.

Adult audiences only, and COPPA

We build platforms for advertising to adults. The FTC’s COPPA guidance covers operators of sites and services directed to children under 13 and treats a persistent identifier that recognizes a user over time as personal information, including when an ad network collects it to serve targeted ads. Our designs keep child-directed inventory out of targeted bidding and do not build audiences of children or teens.

Supply chain transparency: ads.txt, app-ads.txt and sellers.json

Buyers now check who is allowed to sell an impression before they bid on it, so supply chain files are part of the platform, not a publisher chore. Your system has to read them, keep them fresh and act on what they say.

ads.txt and app-ads.txt

ads.txt stands for Authorized Digital Sellers; its stated mission is more transparency in programmatic advertising. app-ads.txt extends the same idea to mobile and connected apps to fight inventory fraud. A buy-side platform crawls these files and declines requests from sellers a publisher has not listed.

sellers.json and the SupplyChain object

sellers.json lets buyers discover the entities that sell or resell inventory, and together with the OpenRTB SupplyChain object it identifies every party that touched a bid request. Sell-side builds publish the file; buy-side builds read it and score supply paths.

Supply path choices

Once the files are in place, the platform can prefer direct paths, drop resellers that add cost without adding reach and show advertisers where their money went. That reporting is often what a client asks about first.

Video, connected TV and header bidding modules

Video and connected TV add formats, players and server-side insertion to the stack, and publishers’ header bidding adds a client-side auction before the ad server. Each arrives with its own specification to follow.

VAST for video ads

IAB’s Video Ad Serving Template (VAST) structures the ad tags that serve ads to video players and carries the ad’s metadata from the ad server to the player. A video build parses, wraps and validates VAST responses and records the player events that prove delivery.

Header bidding development with Prebid

Prebid is a free, fully open-source header bidding suite: Prebid.js runs in the browser, and Prebid Server moves the auction to a server for places such as mobile apps where browser headers are not available. Header bidding development usually means adapters, analytics modules and server configuration rather than a new auction from scratch.

Connected TV measurement

The Media Rating Council lists OTT/CTV and server-side ad insertion measurement guidelines from August 2021 among its standards. CTV builds pay particular attention to device identifiers, household-level frequency and the gap between a server-side insert and a confirmed play.

Martech software development next to adtech

Martech software development builds the tools marketers use with people who already know the brand: customer data platforms, journey and email tools, attribution and analytics. Martech development often shares data pipelines with adtech, which is why we scope them together when both are on the roadmap.

The difference between adtech and martech

Adtech mostly deals with paid media and people who have not yet given you their details; martech mostly deals with your own customers, prospects and channels. The line blurs where first-party audiences are pushed into paid media or ad results feed customer records, and that is where consent records have to travel with the data.

Attribution software development

Attribution tools join ad events to outcomes and assign credit. The hard parts are identity matching within consent limits, deduplicating conversions across platforms and explaining the model in a way finance accepts. We build the pipeline and the reporting; the model choice stays visible and adjustable.

Customer data and journey tools

When the product is a customer data or journey tool, our CRM development and marketing automation software pages describe the neighboring builds; this page covers the parts that touch advertising data.

Inherited an ad server or bidder nobody wants to touch?Share read access to the repository and a week of incident notes. You get a free proposal for a code and architecture review, a stabilization plan and a handover path, with a same-business-day reply.

Get a free proposal

Build, buy or extend an ad platform?

Build when the bidding, pricing or data logic is the product you sell; buy or license when ad serving is a supporting function; extend an existing or open-source base when you need standard features now and custom logic later. Our custom software versus off-the-shelf guide sets out the general decision framework.

Check grid of six outcomes, marked for a custom build and for an existing platform or open-source base.Check grid of six outcomes, marked for a custom build and for an existing platform or open-source base.
Editorial comparison, not a product review. Licenses and vendors differ; check each one.

When is an existing ad server the right start?

A publisher selling direct campaigns on a handful of sites rarely needs a custom ad server on day one. A licensed product, or a free open-source system such as Revive Adserver, which publishes its source code, can run those campaigns while custom work goes into the reporting or marketplace layer that sets the business apart.

When does a custom build pay for itself?

Custom builds make sense when per-impression or revenue-share fees grow faster than the business, when your pricing or audience logic is the reason customers choose you, or when a vendor’s roadmap blocks a product you need to ship.

The extend path

Many platforms start on open-source components such as Prebid Server and add proprietary modules around them. That path ships sooner but ties you to the project’s release cycle, so we plan upgrades into the run budget from the start.

Ad tech consulting before a single line of code

Ad tech consulting is a short, paid discovery that turns an idea into a scope: who the partners are, what volume to expect, which rules apply, what success means and whether to build at all. It is the cheapest point at which to change direction.

Adtech consulting services we run

Typical adtech consulting services include architecture reviews of an existing platform, partner and specification audits, cost-per-request reviews of cloud bills, privacy-signal mapping with your counsel, and technical due diligence for investors looking at an ad tech company.

What a discovery phase produces
DeliverableWhat it containsWho uses it
Partner mapEvery exchange, supply partner, vendor and client system the platform touchesEngineering and business development
Volume and latency modelExpected requests, peaks, regions and partner timeoutsArchitecture and finance
Rules registerPrivacy laws, consent signals, supply chain files and partner policies to honorProduct, counsel, engineering
Architecture outlineServices, data flow, storage and failure behaviorEngineering and investors
Build, buy or extend recommendationWhich parts to build, license or adopt, and whyFounders and executives
Written scope and phase planFeatures per phase, acceptance tests and the quoteEveryone signing off

Technical due diligence on an ad tech company

Investors and acquirers ask us to read the code, the infrastructure and the incident history of an ad tech business. The report covers how the platform scales, where cost per request is heading, how consent is handled and what it would take to replace key people.

How ad tech platform development runs, phase by phase

Ad tech platform development moves through discovery, architecture, a minimum viable product on real traffic, integrations, hardening and the run phase. Each phase ends with a demonstration against agreed tests, and durations are set in the written scope rather than promised up front.

Timeline of six phases: discovery, architecture, MVP, integrations, hardening, then running and improving the platform.Timeline of six phases: discovery, architecture, MVP, integrations, hardening, then running and improving the platform.
Editorial phase plan. Durations are agreed in the written scope.

Ad tech MVP development on real traffic

The first version runs against one partner and one format with a small, controlled share of traffic. That proves the request path, the counting and the budget controls under real conditions before more partners are connected.

Integrations and the long tail of partner quirks

Each partner adds its own extensions, timeouts, reporting formats and test process. We budget integration time per partner and keep a shared adapter layer so the tenth integration costs less than the second.

Hardening: load, security and failover

Before traffic grows, we replay recorded request shapes at several times expected volume, test what happens when a store or a region fails, and run security reviews of the admin interfaces and APIs. The reports are yours to keep and show to partners.

Running and improving the platform

After launch the work becomes on-call, tuning, new specification versions and features. You can keep us on a run retainer, hand over to your own team with runbooks, or mix the two. Our DevOps services page covers the infrastructure side in depth.

What drives adtech software development cost?

We do not publish a price for ad tech software development, because the range between a reporting tool and a multi-region bidder is too wide for one number to help. Every build is quoted after a written scope that names the platform type, the partners, the volume and the phases.

Cost drivers on an ad tech build
DriverWhy it moves the quoteHow to reduce it
Platform typeA bidder, an exchange and a reporting tool differ in components and riskStart with the narrowest product that proves the business
Number of partnersEach integration has its own format, tests and certification stepsLaunch with one or two, add the rest in later phases
Traffic volume and regionsMore regions mean more infrastructure, testing and on-callLaunch in one region, measure cost per million requests
Latency targetsTighter limits require more precomputation and memoryUse each partner’s real timeout, not a guess
Privacy scopeMore jurisdictions mean more signals to parse and testMap signals with counsel before design
Reporting and billing depthInvoices and payouts need audit-grade countingAgree the event of record early
Existing codeTakeovers start with reading, testing and stabilizingShare the repository and incident history in discovery

Infrastructure, data and partner fees are billed by their providers and sit outside our quote; we model them in discovery so the total cost of running the platform is visible before you commit.

Time: Answers inside the time limit. Every partner sets its own timeout.
Spend: Budgets that never overrun. Pacing checked on every win.
Count: Numbers that reconcile. Your counts match the partner's.
Trust: Consent honored end to end. Signals read, stored and passed on.
Scale: Cost per million requests. Measured before traffic doubles.
Watch: Alerts a human acts on. Dashboards tied to money at risk.

How do you choose an adtech development company?

Choose the partner that can show evidence of systems that held up under load, that puts the code and the cloud accounts in your name, and that talks about budgets, consent and reconciliation before it talks about frameworks.

Requirements for an adtech development partner, and how to check each
RequirementHow to check it
Experience with high-volume, low-latency systemsAsk for load-test reports and architecture diagrams from earlier work, with names removed
Knows the specificationsAsk which OpenRTB version and extensions they would support first, and why
Safe budget behaviorAsk what happens to spend when a counter store goes down mid-flight
Privacy designed inAsk how consent strings and opt-out signals are parsed, stored and passed on
Code ownershipConfirm the repository, cloud accounts and keys are in your name from day one
Security practiceAsk how secrets are stored, how admin access is granted and how dependencies are patched
Honest scopingExpect a paid discovery and a written scope before any total price
Exit termsRead the handover clause: documentation, runbooks, knowledge transfer and notice period
Checklist of seven signals: four good and three warning signs.Checklist of seven signals: four good and three warning signs.
Editorial checklist, not a ranking of real firms.
Code: You own the source. Repository in your account from day one.
Load: Load-test evidence. Reports, not adjectives.
Docs: Runbooks and diagrams. Written for your next engineer.
Keys: Your cloud, your keys. No vendor-held credentials.
Exit: A clean handover path. Agreed before the first sprint.
Rules: Privacy built in. Consent and opt-out in the design.

Adtech software companies versus general software firms

Specialist adtech software companies know the vocabulary and the partners; general firms may bring stronger product and infrastructure practice. Either can work if the team on your project has run latency-bound, high-volume systems and can show it.

Questions to ask in the first call

Which part of this would you advise us not to build? What did your last load test find? Who on the team has been on call for a system that moves money? How would you hand this over if we hired our own engineers next year?

How do AI assistants answer questions about ad tech software development?

Founders and product leads now ask ChatGPT, Claude, Perplexity, Gemini, Microsoft Copilot and Google AI Overviews questions such as which companies build ad servers, how to build a bidding platform or what an adtech development company should cost. The answers draw on pages that explain the work plainly and specifically.

What those assistants tend to cite

For technical questions they lean on specification bodies (IAB Tech Lab, IAB Europe), regulators, project documentation and detailed engineering guides. For vendor questions they lean on service pages with clear scope, comparison tables, case material the vendor is allowed to publish and independent directories and reviews.

What an ad tech company should publish to be named

If you sell an ad platform, the same rules apply to you: a plain description of what the product does and for whom, documentation that names the specifications you support, a public ads.txt or sellers.json where relevant, a privacy page that names the signals you honor, and comparison pages that answer buyers’ real questions. Our AEO for SaaS companies page covers this work for software products.

These pages cover the software, infrastructure and marketing work around an ad platform build.

Tell us what you are building

Send the platform type, the partners and the traffic you expect. You get a free proposal with a written scope and a phase plan, and a same-business-day reply.

Get a free proposal

Frequently asked questions

What does ad tech software development cover, and who commissions it?
Ad tech software development is the design, build and operation of software that buys, sells, serves or measures digital advertising: bidding engines, supply tools, ad servers, exchanges, audience data services, reporting and billing. It is commissioned by ad tech and martech companies, publishers, retailers, agencies and founders who need a platform of their own rather than a license to someone else’s.
What do ad tech companies do?
Ad tech companies build and run the software in the chain between an advertiser’s budget and a person’s screen. Some help buyers bid on impressions, some help publishers sell inventory, some run auctions or serve ads, and others handle consent, identity, verification or measurement. Most connect to many other companies through shared specifications.
How do adtech companies make money?
The common models are a percentage of media spend, a fee per thousand impressions or requests, a software subscription, a revenue share with publishers, and data or measurement fees. Many platforms combine two of these. The model matters to the build, because billing, payouts and reporting have to match whatever the contract counts.
What is an adtech platform?
An adtech platform is a software system that performs one or more jobs in digital advertising: bidding, selling inventory, running auctions, serving creatives, building audiences or measuring results. It usually includes an automated request path, data pipelines, reporting, an admin interface for operations teams and APIs for partners and clients.
Is ad tech SaaS?
Often, but not always. Many ad tech products are sold as hosted software with a subscription or usage fee, which is SaaS. Others charge a share of media spend, run as managed services, or are open-source projects a company hosts itself. The engineering is similar either way; the billing model changes.
What is a programmatic platform?
A programmatic platform is software that buys or sells advertising automatically, impression by impression, using rules, data and auctions instead of manual insertion orders. It receives or sends bid requests, decides prices, records delivery and reports spend, and it connects to exchanges and supply partners through shared protocols such as OpenRTB.
How does a programmatic platform process a single impression?
A request arrives from a partner, consent and supply chain checks run, eligible campaigns are filtered by targeting, budget and frequency, the impression is priced, and a bid or no-bid returns before the partner’s timeout. If it wins, the platform logs the win, the impression and any click once each, then updates pacing and reports.
How is adtech different from martech when you are building software?
Adtech mainly handles paid media aimed at people who have not yet shared their details with a brand: bidding, ad serving and measurement. Martech mainly handles a brand’s relationship with known customers and prospects: customer data, email, journeys and analytics. The two meet when first-party audiences feed ad campaigns, and consent has to travel with the data.
How does ad tech work for a publisher selling inventory?
The publisher’s page or app asks for ads, often through a header bidding wrapper and an ad server. Supply partners send bid requests to many buyers, the highest eligible bid wins under the publisher’s floors and rules, the ad server delivers the creative and both sides count the impression. The publisher is paid on the agreed count, minus partner fees.
What sets the price of building an adtech platform?
It depends on the platform type, the number of partners, traffic volume and regions, latency needs, privacy scope and how much reporting and billing must be audit-grade. Progression does not publish a single price for this work; we run a discovery, write the scope and quote from it. Infrastructure and partner fees are billed separately by their providers.
How long does it take to build an ad server or bidding platform?
We plan it in phases rather than a single deadline: discovery, architecture, a minimum viable product on real traffic, integrations, hardening and the run phase. The number of partners and the certification steps each one requires usually decide the calendar, so durations are agreed in the written scope after discovery.
Should we build an ad platform or buy one?
Build when the bidding, pricing or audience logic is what customers pay you for, or when vendor fees grow faster than revenue. Buy or license when ad serving supports a different core business. Extending an open-source base is a middle path that ships sooner but ties you to that project’s release cycle.
How do you build an ad server?
Start with the decisioning rules (priority, targeting, pacing and frequency), a creative store and a counting pipeline that records each impression once. Add trafficking screens for the operations team, reporting that matches what advertisers are billed on and APIs for partners. Test pacing and counting under load before taking real campaigns.
How do you build an ad network?
An ad network needs publisher onboarding and verification, inventory packaging, an ad server or exchange connection, advertiser campaign tools, invalid-traffic controls, reporting for both sides and a payout system. Most new networks launch with a narrow inventory niche and a small set of publishers, then widen once quality and payouts run smoothly.
Can you build on an open-source ad server instead of starting from scratch?
Yes, when it fits. Free open-source systems such as Revive Adserver publish their source code and can run direct-sold campaigns, and Prebid provides open-source header bidding components. We assess the license, the code quality and the upgrade path, then add custom modules around the base rather than forking it heavily.
Which version of OpenRTB should a new bidding platform support?
Support the version your launch partners actually send. OpenRTB 2.6 dates from November 2022 and version 3.0, which came with the companion AdCOM specifications, from April 2022. We build an adapter per partner, so a later version change touches the adapter and never the bidding logic.
How should an ad platform handle consent signals such as TCF strings and Global Privacy Control?
Parse the signal on every request, decide what processing it allows, store that decision with the event, and pass the signal on to partners unchanged. TCF strings and IAB Tech Lab GPP strings carry consent and choice information; Global Privacy Control is a browser opt-out signal that California requires covered businesses to honor. Your counsel sets the policy.
Does the retirement of Google’s Privacy Sandbox APIs change what an ad platform should build?
It removes Topics, Protected Audience and the Attribution Reporting API as long-term inputs, according to Google’s October 17, 2025 update, while Chrome keeps offering users a choice about third-party cookies. Platforms should keep identity inputs plural: first-party IDs, contextual signals and frameworks such as UID2, each with its own consent handling.
Who owns the source code on an adtech development project?
You do. The repository, cloud accounts and deployment keys sit in your organization from the first day, and the code is assigned to you under the contract. That protects the company’s valuation, lets you hire your own engineers later and means no vendor can hold the platform hostage.
What should we prepare before an adtech development company starts discovery?
A short description of the product and its buyers, the partners it must connect to, expected traffic and regions, any existing code or vendor contracts, the privacy jurisdictions you serve and the person who can make product decisions. With that, discovery can start within days and produce a written scope.
Can you take over an existing ad tech codebase from another team?
Yes. We start with read access to the code, infrastructure and incident history, run the existing tests, add monitoring where it is missing and write down how the system really behaves. Then we stabilize the riskiest parts, usually pacing, counting and deployments, before adding features.
Do you build ad platforms that target children or teenagers?
No. We build for advertising to adult audiences. Platforms we build keep child-directed inventory out of targeted bidding, because the FTC’s COPPA rule treats persistent identifiers from children under 13 as personal information, including when an ad network collects them. We do not build audience segments of children or teens.
Is an adtech development company in New York able to work with teams in other countries?
Yes. Progression Agency is based in New York City and builds software for clients across the United States and worldwide, delivered remotely. We overlap working hours with your team for reviews and on-call handovers, and we design for the privacy rules of every region your traffic comes from.

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