Experiment faster.
Convert more.

Run the experiment.
Build the hypothesis.
Measure the lift.

Crow helps you choose the next test, build the variant, and see whether it actually improved conversion.

A/B Testing
Hypothesis Builder
Suggested Tests
CRO Scoring
Site Auditadd-on
Buildadd-on

Free 1-month trial · No credit card required · Cancel anytime

From the leak
to the lift.

Crow gives you a reason for the next change before you ask visitors to live with it.

01
Step 01
Find the leak
Because a polished page can still lose people at one unclear moment.
Crow analyses your copy, proof, friction, and page structure so you can see what is stopping visitors from moving forward.
02
Step 02
Choose the fix
Because the loudest idea is not always the highest-impact one.
Crow ranks the problems by likely conversion impact, giving you a considered next test instead of another Slack-thread hunch.
03
Step 03
Build the variant
Because insight only matters when it becomes a page people can use.
Turn the recommendation into a clearer copy and layout variant without starting from scratch or waiting on engineering.
04
Step 04
Prove the lift
Because a better-looking page is not proof that it converts better.
Run the experiment, keep the hypothesis and result together, and see which version genuinely improves conversion.
Core CRO Platform

Hypothesise. Test.
Convert.

The workflow is simple: choose a test, build the variant, and use conversion data to decide what stays. Add heatmaps or SEO audit when you need more context.

Beat This Page
Paste any competitor URL. Get a higher-converting version in seconds.

Crow fetches and analyses any competitor page, scores it for conversion potential, and hands you an editable block-based version. Improve it, run it through the CRO scoring system, and publish a version that converts better.

Competitor
68/100
12 issues · low CVR
Your version
85/100
↑ +17 pts · higher CVR
Add-ons when you need more context
SEO Site Audit
Full Suite add-on

Crawl the site, find technical and keyword gaps, then work through the pages that need attention first.

Heatmaps
Core + Heatmaps add-on

Click, scroll, and movement heatmaps for every page. See exactly where visitors engage and where they drop off - before you build the next hypothesis.

AI Research Panel
Core + Heatmaps add-on

Ask GPT, Claude, and Gemini the same question, then compare where their answers line up and where they do not.

Sibling product

Need a page to
test on? Meet Build.

Build is a standalone landing page editor that connects directly to Crow experiments. Create a page, hook it into an A/B test, and start collecting conversion data without rebuilding your main site.

Build with 18+ conversion-focused blocks — including hero sections, forms, pricing tables, and social proof. Watch the CRO score as you edit, then publish on your own domain.

18+ block types
Sticky nav, two-column layouts, hero sections, forms, pricing tables, testimonials and more.
Live CRO score
Every block you add or remove instantly updates your conversion score. Build toward 100.
Crow experiments
Connect any Build page directly to a Crow A/B experiment. Traffic splits automatically.
Custom domain
Publish on your own domain or subdomain. Point your DNS, Crow handles the rest.

Experiment data in GA4
and GTM automatically.

If GA4 or GTM is already on the page, crow.js sends the experiment events there when a visitor sees a variant or converts.

Google Tag Manager
dataLayer events
  • crow_experiment_viewed: fired when a visitor is bucketed into a variant
  • crow_conversion: fired when any conversion goal is completed
  • Carries experiment_name, variant_name, experiment_id, variant_id
  • Build triggers to route data to GA4, Segment, Hotjar, or any tag
Google Analytics 4
Google Analytics 4
Custom events
  • crow_experiment_viewed and crow_conversion arrive as GA4 events
  • Segment by experiment_name and variant_name in GA4 Explorations
  • Build audiences, funnels, and attribution reports on experiment data
  • No extra code or GA4 configuration required
Install once
Add this snippet in your page <head>. Crow handles the bucketing and experiment event delivery from there.
<script src="cdn.yourcrow.com/crow.js"
data-key="YOUR_KEY"></script>

Start with Core CRO.
Add what you need.

Every plan includes a full 1-month free trial. No credit card required. Add heatmaps or SEO audit any time - no plan change needed.

Core
$79/ month

The full CRO platform — A/B testing, hypothesis builder, suggested tests, and CRO scoring.

  • 10 active experiments
  • 10,000 tracked visitors / month
  • Live CRO score as you build
  • AI CRO analysis & suggestions
  • Hypothesis builder
  • +7 more →
Start free trial
Most popular
Core + Heatmaps
$199/ month

Everything in Core, plus click & scroll heatmaps to sharpen your hypotheses.

  • Everything in Core
  • Unlimited experiments
  • 100,000 tracked visitors / month
  • Click & scroll heatmaps
  • Beat This Page URL importer
  • +5 more →
Start free trial
Full Suite
$449/ month

Core + Heatmaps + full SEO site audit. Built for agencies and high-traffic campaigns.

  • Everything in Core + Heatmaps
  • Unlimited visitors
  • Full SEO site audit & crawl
  • Keyword gap analysis
  • White-label reports
  • +4 more →
Talk to us

Questions.