Conversion Rate Optimization Agency | More Revenue from Existing Traffic

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. Progression Agency provides conversion rate optimization from New York for ecommerce, SaaS, lead generation and service businesses across the United States and worldwide. 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.

On this page · 13 sections

What conversion rate optimization is and is not
Research: finding the real problems
Hypotheses and prioritization
Testing and reading results
CRO by business type
Landing pages for paid traffic
Personalization
When testing is not possible
Measurement and analytics
What a CRO agency delivers each month
How to choose a conversion rate optimization agency
What it costs: conversion rate optimization
Related services and guides

The short answerDoubling conversion rate is worth as much as doubling traffic and usually costs less. Conversion rate optimization is research first: analytics, session recordings, heatmaps, surveys, user tests and customer interviews find why visitors leave; then prioritized hypotheses are tested with statistical rigor, winners ship and the program continues. It is not button colors and guesswork. It is measured in revenue or leads per visitor, and on sites without enough traffic to test, it is done with research-led redesign and before-and-after measurement.

Ranges on this page are the planning figures Progression Agency publishes; a quote follows a written scope. Nothing here describes a named client or a measured result for one.

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.

Companies search for a CRO agency, conversion rate optimization services, CRO services, a conversion optimization agency, the best CRO agencies, a CRO company, an ecommerce CRO agency, landing page optimization, an A/B testing agency, a conversion rate optimization consultant, website conversion optimization, a CRO audit, CRO for SaaS and revenue per visitor. One program covers all of them.

Research: finding the real problems

CRO research methods
Method	What it finds
Analytics and funnel analysis	Where visitors drop, by device, source and segment
Session recordings and heatmaps	How visitors actually behave on key pages
On-site surveys and exit polls	Why visitors hesitate or leave, in their words
Customer interviews	What buyers needed to believe before purchasing
User testing	Where the interface confuses or fails
Technical and speed audit	Errors, slow pages and broken states on real devices
Competitive review	What alternatives promise and show

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.

CRO by business type

What CRO focuses on by business
Business	Focus areas
Ecommerce	Product pages, cart and checkout, shipping and returns clarity, search and navigation, mobile
SaaS	Pricing page, trial and demo flows, onboarding, sign-up friction
Lead generation and services	Landing pages, forms, phone and chat, trust signals, offer framing
Marketplaces and apps	Two-sided flows, onboarding, activation
Content and media	Subscription and email capture, ad viewability without harming reading

Our Shopify checkout optimization page covers ecommerce checkout; B2B SaaS marketing covers software funnels; lead generation covers inquiry paths.

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.

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

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

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.

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 planning ranges below are the ones we quote against; they come from our published marketing agency pricing guide, and the final number follows a written scope.

Planning ranges by engagement type (US figures)
Engagement	Typical range	What it suits
Boutique agency retainer	$2,000–$15,000 / month	Senior attention across two or three channels
Solo consultant or fractional lead	$1,500–$8,000 / month	Direction and one discipline done well
Full-service retainer	$8,000–$50,000 / month	Integrated channels with a dedicated team
Fixed-scope project (audit, plan, launch)	$2,500–$40,000	A defined deliverable with a start and an end
Google Ads management	$800–$2,500 / month, or 10–20% of spend at scale	Search demand that already exists
Meta ads management	$1,200–$4,000 / month	Creative-led demand generation

Every figure above is a planning range 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.

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

Getting found in search

AI, AEO and what is changing

Paid media and lead generation

Websites and design

Choosing and working with an agency

Software and app development

Web development, platforms and hosting

Social, content and brand

By industry and by situation

Frequently asked questions

What does a conversion rate optimization agency do?

It raises the share of visitors who buy, book or inquire through research, prioritized hypotheses, rigorous A/B testing, landing page and funnel work, personalization and measurement, run as a continuous program.

What does CRO cost?

CRO programs run $3,000–$15,000 per month depending on traffic, testing volume and development needs; audits and landing page projects are scoped. Ranges are published; quotes follow discovery.

What is a good conversion rate?

It depends on the business, traffic source and device; the useful measure is your own revenue or leads per visitor improving over time.

How much traffic do we need to run A/B tests?

Typically a few hundred conversions per month on the tested page; below that, research-led redesign with before-and-after measurement is the honest approach.

How long does a test take?

Two to six weeks to reach the pre-set sample size across full business cycles.

Do you do ecommerce CRO?

Yes: product pages, cart, checkout, shipping clarity, search and mobile.

Do you do SaaS CRO?

Yes: pricing, trial and demo flows, onboarding and sign-up friction.

Do you do CRO for lead generation sites?

Yes: landing pages, forms, phone and chat, trust and offer framing.

Do you build landing pages for ads?

Yes, built for the ad’s promise and tested by campaign.

Which testing tools do you use?

Whatever fits your stack; tooling is set up in your accounts and stays yours.

Do you implement the winners?

Yes, with your developers or ours.

What research do you do?

Analytics, session recordings, heatmaps, surveys, interviews, user tests, technical audits and competitive review.

Can CRO hurt SEO?

Not when done properly; tests are set up to avoid cloaking and duplicate content, and winners ship as normal pages.

Do you do personalization?

Yes, where data supports it and testing proves it.

How do you measure the program’s value?

Revenue or leads per visitor by segment, test wins with confidence, and program return over time.

How soon will CRO show results?

Quick fixes from research within weeks; the test program compounds over quarters.

Do you work with companies outside New York?

Yes, across the United States and worldwide.

Who owns the tooling, data and learnings?

You do.

Is there a contract?

Month to month after setup, with a written scope and 30-day notice.

What is the first step?

Send your site, analytics access and current conversion numbers. You get a research summary and a quote.

Want a marketing plan for your business, not a template?Send the market you serve, what a new customer is worth and what you spend today. You get a written plan with channels, budget and the first 90 days, before any retainer.

Get the plan

Get a free marketing proposal

Tell us what you are trying to grow and we will come back with a plan, not a pitch deck. Same-day reply on weekdays.

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