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

Find the leak.
Test the fix.
Measure the change.

01
Step 01
Find the leak
Give Crow a live URL. It checks the page for unclear copy, friction, missing proof, and other places people may be dropping out.
02
Step 02
Test the fix
Start with the issues most likely to matter. Crow gives each one an estimated impact so your next test is a considered choice, not a Slack-thread hunch.
03
Step 03
See what changed
Keep the hypothesis, variant, and conversion result together, so you can tell what worked and what to try next.
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.

Free resource

The Complete Guide
to CRO

10 chapters covering everything from calculating your conversion rate to running statistically valid A/B tests. Practical, jargon-free, and backed by data.

Stop leaving revenue
at the door.

Join growth teams who use Crow to find and fix the leaks in their funnel - and keep finding them, every week.

1-month free trial · No credit card · Cancel any time