Company lists · Data refreshed September 2026
Top 25 Cro agencies worldwide
RevenueBase identified 1,919 cro agencies worldwide as of September 2026 and tracks 15,498 professional contacts across them, including 5,950 with verified work emails. The United States is the largest market and London the largest hub.
This list covers cro agencies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for cro agencies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest cro agencies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,860 contacts → | ||||
Indirect evidence “KINESSO is the technology-driven performance marketing agency within Omnicom Media that provides actionable growth for both agency partners and clients.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 340 contacts → | ||||
Strong evidence “We are a trusted growth marketing agency that brings together scarce skills in the area of CRO (conversion rate optimization), Paid Media (Search, Performance, Video, Audio…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 334 contacts → | ||||
Indirect evidence “At AB Tasty, we’re your partner for pushing great ideas even further through optimization.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 306 contacts → | ||||
Indirect evidence “Running an A/B testing program is tricky.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 268 contacts → | ||||
Indirect evidence “CIBI Information Inc.(CIBI), the Philippines' first credit reporting agency, was first organized in 1982 as Credit Information Exchange System, a business information division…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 256 contacts → | ||||
Indirect evidence “ELOGIA, a VIKO Group Company, is a digital agency specialized in "Digital Commerce Marketing", We help our clients to use the digital media to sell more.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 248 contacts → | ||||
Indirect evidence “We are a performance-focused digital agency committed to efficiently and transparently driving real growth for major international businesses in an innovative environment, with a…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 209 contacts → | ||||
Indirect evidence “Acuité Ratings & Research Limited is a full-service Credit Rating Agency, registered with the Securities and Exchange Board of India (SEBI), and accredited by Reserve Bank of…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 185 contacts → | ||||
Indirect evidence “EchoLogyx started with a simple idea – provide test development and QA support to the Conversion Rate Optimization teams.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 180 contacts → | ||||
Strong evidence “30% conversion lift on your website in 90 days through predictive CRO- Prediction engine scrapes websites to find winning A/B tests from other companies- Full-service team does…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 168 contacts → | ||||
Indirect evidence “Innoppl Inc commonly known as "Innovative People", Innoppl, Inc.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 160 contacts → | ||||
Indirect evidence “ICEA S.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 115 contacts → | ||||
Indirect evidence “CRISL is the first ever joint venture rating agency operating in Bangladesh since 1995.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 112 contacts → | ||||
Strong evidence “GAIN Conversion is the world's leading CRO agency.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 109 contacts → | ||||
Indirect evidence “Grizzly New Marketing is een gespecialiseerd SEO marketingbureau in Nederland (Breda en Rotterdam), België (Antwerpen-Berchem) en de Verenigde Staten (New York).” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 102 contacts → | ||||
Indirect evidence “1st & only marketing agency to ever win Glassdoor's #1 Best Place To Work Award (2022) KlientBoost is the performance marketing agency with the most published wins (case studies…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 94 contacts → | ||||
Indirect evidence “One of the first Conversion Rate Optimization Agencies out of India.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 91 contacts → | ||||
Indirect evidence “Tailor Every Touchpoint.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 85 contacts → | ||||
Indirect evidence “A CNAC (Confederação Nacional de Auditoria Cooperativa) é uma entidade de auditoria cooperativa, criada em 2007, com atuação em todo território nacional.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 82 contacts → | ||||
Strong evidence “AI-powered behavioral marketing and CRO partner for ecommerce brands, driving personalization, higher order values, and cart abandonment recovery through managed on-site and email…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 82 contacts → | ||||
Indirect evidence “Leadoo Marketing Technologies was founded with a mission to make websites convert more effectively.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 80 contacts → | ||||
Indirect evidence “HawkSEM is a results-driven digital marketing agency with roots in paid search that date back more than a decade.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 80 contacts → | ||||
Indirect evidence “We deliver growth through Traffic Generation, Conversion Rate and Lifetime Value Optimisation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 76 contacts → | ||||
Indirect evidence “Farm Credit of Central Florida, an Agricultural Credit Association headquartered in Lakeland, Florida, provides loans, leases, and other financial services to farmers, ranchers…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 73 contacts → | ||||
Indirect evidence “Yottaa is the ultimate eCommerce performance booster for brands and retailers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cro agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names cro agencies.
- Partial evidence
- Its own public description names part of cro agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cro agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,919 cro agencies worldwide
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Cro agencies worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cro agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for cro agencies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “cro agencies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cro agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among cro agencies, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 5,950 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Cro agencies by location
11 lists · largest firstEvery Cro agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Cro agencies based in the United States328
- Cro agencies based in the United Kingdom164
- Cro agencies based in India98
- Cro agencies based in the Netherlands81
- Cro agencies based in Germany66
- Cro agencies based in Brazil64
- Cro agencies based in France62
- Cro agencies based in Australia55
- Cro agencies based in Canada51
- Cro agencies based in Spain41
- Cro agencies based in Sweden28
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cro agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many cro agencies are there worldwide?
RevenueBase identified 1,919 cro agencies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Kinesso, headquartered in New York, tops this list with the largest team on record.
Which country has the most cro agencies?
The United States leads with 328 companies, followed by the United Kingdom (164) and India (98). Every cro agencies list by country and city is linked on this page.
Which city has the most cro agencies?
London leads with 65 headquartered companies, followed by Paris (26) and Los Angeles (22).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 5,950 verified decision-maker contacts tracked across these 1,919 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.