Conversion Rate Optimization Agency: More Revenue from the Traffic You Already Pay For

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

A conversion rate optimization agency (CRO agency) increases the share of visitors who buy, book or inquire: research into why visitors leave, hypotheses, A/B and multivariate tests, landing page and checkout redesign, form and funnel work, personalization and measurement, run as a continuous program. Conversion rate optimization services differ from general web work because every change starts with evidence about a specific leak. A conversion optimization company should show you that evidence, and the conversion optimization companies worth hiring also say when a test is not worth running. A conversion rate optimization consultant earns trust by starting with how visitors behave today, and only then proposing tests, so the first deliverable is a diagnosis rather than a new button color. Ecommerce, SaaS, lead generation and service businesses across the United States and worldwide use Progression Agency in New York for conversion rate optimization. This page explains what CRO is and is not, the research that finds the real problems, how tests are run and read, CRO for ecommerce, SaaS and lead generation, when testing is not possible and what to do instead, what a CRO agency should report, and what it costs.

What conversion rate optimization is and is not

It is a research and testing program that raises revenue or leads per visitor; it is not a list of best practices applied blindly, and it is not redesign for its own sake. Our website design page covers builds; Google Ads management and paid social cover the traffic CRO makes more valuable. So what is conversion rate optimization in daily practice? Finding what stops qualified visitors, testing a fix and keeping what wins. SEO conversion rate optimization then treats the same page as both a ranking asset and a sales asset, so we check that a winning change does not strip out the content that earned the visit.

Research: finding the real problems

Hypotheses and prioritization

Each finding becomes a hypothesis with expected impact, confidence and effort; the highest-value tests run first. The backlog is shared and updated monthly.

Testing and reading results

A/B and multivariate tests run to pre-set sample sizes and durations; results are read with proper statistics, by segment, on revenue or leads per visitor rather than click-through alone; winners ship and losers teach. Peeking, stopping early and testing tiny changes on low traffic are the errors we do not make.

Adobe Target and enterprise testing platforms

The tool that comes up whenever a large organization discusses experimentation.

What is Adobe Target used for? Running experiments and delivering personalized experiences on a website or app: A/B tests, multivariate tests, audience-based content targeting and algorithmic recommendations. It sits inside the Adobe Experience Cloud, which is the reason it is chosen as often as not: organizations already running Adobe Analytics get shared audiences and reporting without a separate integration.

How does Adobe Target work, mechanically: a small library on the page requests an experience decision for the current visitor, the platform evaluates the active activities and audience rules, and returns the variant to render. That request happens before the affected content paints, which is why implementation quality determines whether tests cause a visible flicker.

AB testing in Adobe Target has the same statistical requirements as testing anywhere: enough conversions per variant to distinguish a real effect from noise, a decided sample size before the test starts, and a discipline against stopping early because a result looks good. What does Adobe Target do that a lighter tool does not? Mostly enterprise plumbing: server-side delivery, audience sharing across the suite, and the governance a large organization needs when several teams test on the same pages at once.

Choosing a conversion rate optimization tool by the job it does

Buy a conversion rate optimization tool for one of four jobs: analytics shows where visitors drop off, session recordings and heatmaps show how they behave, surveys collect reasons in their own words, and testing tools measure whether a change worked. Conversion rate optimization software that claims to do all four may be fine for a smaller site, but check how deep each part goes.

Round-ups of the best conversion rate optimization tools can’t weigh your traffic or stack, so judge by whether the tool slows your pages, respects consent settings and connects to your real revenue figures. A conversion optimization platform priced for enterprise makes little sense if your traffic cannot reach a statistically useful result in a reasonable time.

CRO by business type

Our Shopify checkout optimization page covers ecommerce checkout; B2B SaaS marketing covers software funnels; lead generation covers inquiry paths. B2B conversion rate optimization works with fewer visitors and longer buying cycles, so we usually measure qualified meetings and pipeline rather than raw form fills.

Ecommerce conversion rate optimization, from Shopify conversion rate optimization to Etsy

The work covers the whole trip: search, category filters, product photos, delivery costs, returns and checkout. The most useful number is often revenue per visitor by device, as a discount can lift conversion while lowering profit.

Shopify conversion rate optimization can begin with the store’s own reports, because Shopify counts conversion as sessions ending in a completed checkout and breaks the funnel into cart and checkout stages. Etsy conversion rate optimization has fewer levers since Etsy controls the storefront. Its stats define conversion as visits ending in an order, so photos, price, reviews and listing copy are where sellers can act, and Search Analytics shows conversion by search term.

Ecommerce conversion rate optimization services should also include implementation on your platform, not just a slide of findings. When you compare ecommerce conversion optimization services, ask who builds the winning version and how they handle theme updates and sale periods during a test.

Landing pages for paid traffic

Paid campaigns convert on pages built for the ad’s promise: one message, one action, proof, speed; tested by campaign and audience. A conversion rate optimization landing page should also repeat the ad’s wording in its headline, because visitors who cannot see the promise they clicked on tend to leave quickly.

Personalization

Content and offers by source, location, device, returning status or account, where data supports it and testing proves it; personalization without measurement is a guess.

When testing is not possible

Sites with fewer than a few thousand conversions a year cannot run reliable A/B tests; there, research-led redesign with before-and-after measurement, sequential tests on high-traffic pages and qualitative validation do the work honestly.

Measurement and analytics

Clean event tracking, revenue and lead attribution, server-side tracking where needed and dashboards that report revenue or leads per visitor by segment. Our marketing automation page covers systems.

What a CRO agency delivers each month

1. Research updates: analytics, recordings, surveys, interviews.
2. Prioritized hypothesis backlog.
3. Tests designed, built, run and read.
4. Winners implemented; learnings documented.
5. Landing pages for campaigns.
6. Measurement maintenance.
7. Reporting: revenue or leads per visitor, test results and program value.

Every program opens with a conversion rate optimization audit that names the biggest leaks, the evidence and which fixes need no test at all. Website conversion rate optimization services then turn that list into monthly work.

Conversion optimization consulting or an ongoing CRO program

Handing over the research alone, meaning the audit, the evidence behind each leak and a prioritized list of fixes, is how conversion optimization consulting usually works when your own team does the building and testing. An ongoing program keeps going past that list, running the tests, reading the results and shipping the winners month after month.

The deciding question is capacity. A team with developers and a testing tool in place can often act on a roadmap by itself, while a team without them tends to stall at the list, and the audit then sits unused.

How to choose a conversion rate optimization agency

• Ask how they research before testing.
• Ask how they compute sample size and read results.
• Ask what they do when traffic is too low to test.
• Ask what they report: revenue per visitor, not test counts.
• Ask who owns the tooling, data and learnings. You must.

Ask a conversion rate optimization expert to show you a losing test and what it taught. Anyone who can only show winners has either run very few tests or is leaving out the useful part, so hold a conversion rate optimization specialist to the same request.

What it costs: conversion rate optimization

Marketing retainers are priced by the channels and the hours behind them, not by the size of the client. For conversion rate optimization, the price bands below are the ones we scope against; they come from our published marketing agency pricing guide, and the final number follows a written scope.

Every figure above is a price band already published on this site; the quote for conversion rate optimization follows a written scope, and the same ranges apply across the United States and worldwide.

Related services and guides

Pages on this site that sit next to conversion rate optimization and that a buyer usually reads alongside it.

• Website design and development
• Shopify checkout optimization
• Search engine advertising
• Lead generation agency
• Marketing automation agency
• B2B SaaS marketing agency

Frequently asked questions