How It Works
CustomFit.ai is built for marketers — not engineers. Four steps from zero to a live, data-driven experiment on your real site.
Add a single JavaScript snippet to your site's <head> tag — or install the Shopify app with one click. No code changes, no developer ticket, no waiting. CustomFit.ai immediately begins recognizing your page structure.
Click any element on your live site and change it — headlines, images, CTAs, layouts, prices, banners. Create your A/B variant or personalized experience visually, exactly as visitors will see it. No design software, no engineering.
Choose who sees what — and what counts as a win. Target by location, device, referral source, cart value, past purchases, visit count, UTM parameters, or 1000+ other signals. Set your primary metric: revenue per visitor, CVR, AOV, or any custom event.
CustomFit.ai tells you when you have a winner — with statistical significance, not gut feeling. Ship the winning variant to 100% of visitors with one click. Then start the next test. Most teams run 3–5 concurrent experiments within their first month.
14-day free trial. No credit card. No engineer needed.