How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- VWO, Optimizely, Convert, and Kameleoon are testing platforms a team runs itself, while Speero, Invesp, and WiderFunnel are agencies that run research, tests, and analysis as a service.
- Hotjar, now part of Contentsquare, fits teams that need heatmaps, recordings, and surveys to find friction before they test a fix.
- The best CRO choice depends on traffic, team size, and whether a buyer needs software, people, or both.
- A platform without a testing plan will not raise conversion on its own, and an agency without access to data and developers will move slowly.
- Start with analytics fixes, a clear primary metric, and one well-formed hypothesis, not with a long list of random tests.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 VWO | All-in-one testing and personalization | See website | Free trial |
 Optimizely | Enterprise experimentation at scale | See website | No |
 Convert | Privacy-first A/B testing | See website | No |
 Kameleoon | AI-assisted experimentation | See website | No |
 Speero | Growth experimentation agency | See website | No |
 Invesp | CRO agency with a conversion platform | See website | No |
 WiderFunnel | Dedicated CRO agency programs | See website | No |
 Hotjar | Heatmaps, recordings, and surveys | $0 | Yes |
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
The best cro companies
#1VWO
Best for: All-in-one testing and personalization4.4/5 on
G2 (929 reviews, checked Oct 2026)
Visit vwo.com
Starting priceSee website
Free planFree trial
VWO, now presented under Wingify after the VWO and AB Tasty combination, suits a marketing or product team that wants insight and action in one place. The platform covers web experimentation, personalization, heatmaps, session recordings, funnels, and surveys, plus feature management for controlled rollouts. A team can install a SmartCode snippet, build a test in a visual editor, target an audience, and read results without a developer for most web tests.
The honest catch is traffic and discipline. A/B tests need enough visitors and conversions to give a trustworthy result, and a team that runs many small tests at once will wait longer for answers. VWO helps with AI-assisted hypothesis and setup features, but the team still needs a primary metric, a minimum sample size, and a rule for when to stop a test. Use the trial to run one real test end to end, not just to browse reports.
What we like- Testing, personalization, behavior analytics, and feature management in one Wingify platform
- Visual editor for marketers
- 30-day free trial with no credit card on the vendor site
Watch out for- Full platform pricing is quote-based for many plans
- Teams with low traffic may struggle to reach test conclusions quickly
Starting priceSee website
Free planNo
Optimizely fits a large company that runs experimentation across marketing, product, and commerce, with several teams sharing one platform. The vendor presents itself as an AI platform for creating and optimizing digital experiences, with tools for testing, personalization, content management, and commerce. That breadth helps when a test touches content, product pages, and checkout in one journey, rather than a single landing page.
Smaller teams should weigh cost and complexity before choosing Optimizely. A large platform needs governance, tagging, and a testing roadmap, or it becomes another dashboard that few people use. Ask for a demo on a real use case from the buyer's site, check which products are included in the quoted plan, and confirm what support and onboarding are included. For a team with high traffic and a dedicated growth owner, the scale can be worth it.
What we like- Broad experimentation, content, and commerce tools
- Strong fit for large sites with many teams
- AI features for content and optimization workflows
Watch out for- Enterprise pricing and setup suit larger budgets
- Smaller teams may find the platform more than they need
#3Convert
Best for: Privacy-first A/B testing4.6/5 on
G2 (98 reviews, checked Oct 2026)
Visit convert.com
Starting priceSee website
Free planNo
Convert, known as Convert Experiences, suits a team that wants a focused experimentation tool with a strong privacy stance and a lower enterprise feel. The platform supports A/B tests, split URL tests, multi-page tests, multivariate tests, price testing, multi-arm bandit tests, and server-side testing through SDKs. The vendor also highlights onboarding with a kick-off call, goal setup, and A/A testing, plus migration help from other testing tools.
The trade-off is breadth. Convert is a testing specialist, not a full analytics or personalization suite, so a team may still need separate tools for heatmaps, surveys, or customer data. That focus can be a strength for a team that already has analytics in place and wants a reliable test engine. Check the plan by monthly tested users, because traffic volume drives price, and confirm how personalization and reporting work for the team's main funnel.
What we like- A/B, split URL, multivariate, and full-stack testing
- Privacy and compliance focus with GDPR, HIPAA, and SOC 2 mentions
- Onboarding and migration help
Watch out for- No free plan for ongoing use
- Visual editor and reporting depth should be checked against VWO and Optimizely for a specific team
#4Kameleoon
Best for: AI-assisted experimentation4.6/5 on
G2 (137 reviews, checked Oct 2026)
Visit kameleoon.com
Starting priceSee website
Free planNo
Kameleoon fits a team that wants to move from idea to test faster, with AI help to build and preview changes. The vendor describes prompt-based experimentation, where a team can describe a change and get production-grade code for dynamic pages, plus real-time reporting, conversion alerts, and tools to prevent sample ratio mismatch. That speed helps a team that has many ideas but a slow design and development queue.
The limit is review and governance. AI-built tests still need QA, a clear hypothesis, and a check that the change does not break other parts of a page. A team should test the AI workflow on a low-risk page first, confirm how approvals work, and check whether the platform fits single-page apps built with React or Next.js, which Kameleoon lists as supported. Speed without QA can create false results, so keep a human review step for every live test.
What we like- Prompt-based experimentation with AI help to build tests
- Real-time reporting and alerts
- Feature flags and personalization in the same platform
Watch out for- Newer AI workflows need a desktop setup and browser extension for some tasks
- Pricing is quote-based and depends on traffic and features
Starting priceSee website
Free planNo
Speero suits a company that wants an experimentation program, not just a tool license. The agency describes growth experimentation as an operating system, with customer research, data science, strategy, A/B testing, analytics, and engineering working together. Its site lists AI playbooks for persona work, hypothesis prototyping, segmentation, and reporting, which can speed up research and analysis when used with human review.
An agency engagement only works when the client can act on findings. A team that cannot ship test variations, share analytics, or approve changes quickly will see slow progress, no matter how strong the agency is. Before signing, agree on test velocity, who builds variations, who owns analysis, and how results are reported. Speero fits best when a company wants to build internal capability over time, not when it wants a single test and then stops.
What we like- Agency that builds and scales experimentation programs
- UX research, data, engineering, and A/B testing together
- AI-assisted research and analysis playbooks
Watch out for- Agency fees suit teams with a budget for ongoing work
- Results depend on access to data, developers, and decision makers on the client side
Starting priceSee website
Free planNo
Invesp fits an e-commerce, SaaS, or lead generation brand that wants both a platform and a team in one engagement. The agency presents CRO Catalyst as a conversion intelligence platform that crawls many sites for winning patterns and shows every test's revenue, while a senior pod runs research, design, development, QA, and analysis. Its site describes first tests live in about 15 days, with a testing track and a research track running in parallel.
The honest point is fit and fee structure. Invesp describes programs for brands doing $6 million or more, plus a smaller program for brands doing $1 million to $6 million, and a no lift, no fee option for eligible brands. A buyer should read exactly how lift is measured, what counts as a win, and what happens if results fall short. For a brand with enough traffic and revenue, the combined platform and pod can move faster than a tool alone.
What we like- CRO-only agency since 2006 on its site
- CRO Catalyst platform with conversion opportunities and per-test revenue
- Senior pod model with strategist, UX, developer, QA, and analyst roles
Watch out for- Main programs suit brands with larger revenue, with a smaller program for brands under $6 million
- Performance pricing terms need a careful read
Starting priceSee website
Free planNo
WiderFunnel, now presented as Conversion on its site, suits a company that wants a dedicated CRO agency with a long track record in experimentation. The agency covers advanced CRO, personalization, product and pricing experimentation, enterprise program consulting, data and analytics, and conversion-centered design. Its Liftmap tool stores and reports experiments, which helps a team learn from past tests instead of repeating them.
The limit is the same as for any agency: traffic, access, and commitment decide speed. A site with low monthly conversions will need longer tests or tests on higher-traffic pages, and a team that cannot implement winners will not keep gains. WiderFunnel fits best when a company has a clear growth goal, a site with enough traffic to test, and an internal owner who can approve and ship changes. Ask for a sample roadmap and a sample readout before signing, so reporting quality is clear.
What we like- CRO-only agency with experimentation, UX research, and personalization
- Liftmap tool for experiment records
- Experience across e-commerce, SaaS, media, and non-profit sectors
Watch out for- Agency programs are priced per engagement and suit teams ready to commit to a program
- Small sites with low traffic will see slower test conclusions
#8Hotjar
Best for: Heatmaps, recordings, and surveys4.3/5 on
G2 (345 reviews, checked Oct 2026)
Visit hotjar.com
Starting price$0
Free planYes
Hotjar fits a team that needs to see why visitors drop off before it tests a fix. Heatmaps show where people click and scroll, recordings show real journeys, and surveys collect reasons in the visitor's own words. The vendor page now states that Hotjar is part of Contentsquare, and new users sign up for Contentsquare Free, which includes Hotjar features plus attention maps, funnels, error monitoring, and AI summaries.
The catch is that insight alone does not raise conversion. A team should pair Hotjar with a testing tool such as VWO, Optimizely, Convert, or Kameleoon, or with an agency that can turn findings into tests. Start with the highest-traffic drop-off page, watch a sample of recordings, and form one hypothesis per finding. That discipline turns a large pile of recordings into a short test list that a team can actually run.
What we like- Heatmaps, session recordings, surveys, funnels, and AI summaries in Contentsquare Free
- Free plan covers up to 200,000 sessions per month on the vendor page
- Integrations with Slack, Jira, and other tools
Watch out for- Hotjar accounts are no longer created separately, as new users sign up through Contentsquare
- It finds friction, but it does not run A/B tests on its own
How we chose
We reviewed vendor homepages, pricing pages, product documentation, and public reviews on G2, Capterra, and Reddit, and we kept only companies with a live homepage that matched the named product or its successor. We looked for real CRO work: A/B testing, personalization, behavior analysis, research, or agency programs with shipped tests and clear reporting. We noted mergers and name changes where they affect sign-up, such as VWO under Wingify, AB Tasty joining Wingify, Hotjar moving into Contentsquare, and WiderFunnel presenting as Conversion. Pricing is written as See website where a vendor quotes by traffic, users, or engagement, because a single monthly figure would mislead buyers with different volumes.
A platform fits a team that has an owner, a developer or designer who can build variations, and enough traffic to learn from tests. An agency fits a team that needs research, design, development, and analysis together, and that can fund a program for several months. A hybrid path also works: use an agency to set up research and a first roadmap, then run later tests in-house on a platform. Whichever path a buyer picks, the contract should name test velocity, reporting, and who owns the test backlog.
Metrics, sample size, and test quality
Pick one primary metric per test, such as completed checkout, qualified demo request, or paid signup, and track guardrail metrics such as revenue per visitor and bounce on key pages. Check sample size before launch, and do not stop a test early just because an early result looks good. Run A/A tests when setting up a new tool, check for sample ratio mismatch, and QA variations on mobile and desktop, in the main browsers, and with common ad blockers. A clean test with a clear loser is more useful than a messy test with a claimed winner.
Research before testing
Good CRO starts with research, not with a test idea from a meeting. Review analytics funnels, heatmaps, recordings, polls, and customer support messages, then rank friction by impact and ease of fix. A homepage headline test may look easy, but a checkout form fix may matter more. Build a backlog with hypothesis, expected effect, effort, and evidence for each idea, and review it weekly. That backlog keeps a program focused when new requests arrive.
What to ask on a sales call
Ask how pricing scales with traffic, what is included in onboarding, and how long a typical first test takes from brief to launch. Ask for a sample readout, a sample test plan, and a reference client in a similar sector and traffic band. For agencies, ask who will be on the pod, how many tests run per month, and what happens if a test fails. For platforms, ask about support hours, data retention, privacy controls, and how experiments are QA checked. Clear answers on those points matter more than a feature list.
Frequently asked questions
What is the difference between CRO and A/B testing?
CRO is the full program of research, hypothesis, design, testing, and analysis that raises conversion. A/B testing is one method inside that program. A team can run A/B tests without a CRO program, but results will be slower and less consistent without research and a backlog.
How much traffic do I need for CRO?
It depends on the current conversion rate and the size of change a test must detect. A site with a few hundred conversions per month can still run tests, but conclusions will take longer, and tests should focus on high-traffic pages. A vendor or agency should show a sample size estimate before a test launches.
Should a small business hire a CRO agency or buy a tool?
A small business with a clear owner and time to learn can start with a tool and a research method such as Hotjar plus a testing platform. A small business with budget but no time may get faster value from an agency, if traffic is high enough to test. A business with very low traffic should fix analytics, page speed, and offer clarity first.
How long does it take to see CRO results?
A first test can launch in weeks, but a reliable lift in overall conversion usually takes months of consistent testing. Early wins on a single page do not always lift site-wide revenue, so track revenue per visitor and primary conversions, not only test-level wins.
Do CRO tools work with my analytics and CMS?
Most major tools integrate with common analytics, tag managers, and CMS platforms, but a buyer should confirm the exact stack before purchase. Check for Google Analytics, tag manager, e-commerce, and consent tool integrations, and ask how server-side tests are handled if the site uses a single-page app.
Is CRO a one-time project?
No, in most cases. Visitor behavior, traffic sources, and offers change, so a program that stops after one test will lose gains over time. A sustainable program keeps research, testing, and reporting on a regular cadence, even if test volume is small.
Sources we checked (8)
- https://www.vwo.com/pricing
- https://www.optimizely.com/pricing
- https://convert.com/pricing
- https://www.kameleoon.com/pricing
- https://speero.com
- https://www.invespcro.com/pricing
- https://www.widerfunnel.com
- https://hotjar.com/pricing
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.