Cindex
Paste any URL. Get 150+ conversion fixes in seconds.
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Aaron B

Cindex - Paste any URL. Get 150+ conversion fixes in seconds.

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Cindex audits any webpage against 150+ conversion benchmarks used by companies like Stripe, Apple, and Shopify, then tells you exactly what to fix and why. Paste a URL and get a prioritized breakdown of what's hurting your conversion rate, from copy and layout to trust signals and page speed. Every recommendation is backed by real A/B test data, not opinions. The patterns library includes over 40+ research-backed CRO examples with downloadable components you can implement immediately.

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Aaron B
Maker
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Hey Product Hunt 👋 I'm Aaron, the maker of Cindex. I built this because I kept running into the same problem: a client or teammate would ask "why isn't this page converting?" and the answer was always scattered across 15 blog posts, half-remembered A/B test results, and gut feelings. I wanted a tool that could look at any URL and immediately say: here are the specific things that are off, here's the evidence behind each one, and here's what the best-performing pages do differently. Not a generic "add more social proof" checklist, but actual benchmarked analysis with priorities. Under the hood, Cindex runs 150+ checks against a research database I built using proven data from A/B tests, with additional UX evaluation powered by Claude AI (Sonnet 4.5), comparing your page against patterns from high-converting sites like Stripe, Apple, Shopify, and others. It also includes a patterns library with 40 research-backed CRO examples and downloadable components so you can act on the findings fast. The stack is Next.js + TypeScript, Prisma + PostgreSQL on the backend, and Claude handling part of the analysis layer. Pricing is simple: Free gives you 3 audits/month. Pro at $49/month unlocks 25 audits, deeper AI analysis, PDF exports, and full library access. I'd love your honest feedback - what's useful, what's missing, what would make you actually use this regularly. Happy to answer any questions in the comments. Thanks for checking it out 🙏