Krato

Inspiration

I build solo apps fast using AI coding tools. But after every deploy, I had to manually click through everything to find bugs. No affordable QA tool existed for solo developers. So I built one.

What it does

Krato tests both apps and websites like a real user. Give it a live URL, and it:

Scans buttons, links, forms, and inputs
Catches console errors and broken network requests
Uses AI to explain every issue in plain English
Saves results with severity scores (critical/medium/low)
Exports reports as PDF

How we built it

Next.js, TypeScript, Tailwind CSS, Supabase. Playwright for browser automation. Groq API (Llama 3.3 70B) for AI analysis. Deployed on Vercel.

Challenges we ran into

Playwright doesn't run out of the box on serverless platforms. Had to use @sparticuz/chromium to make it work on Vercel. Also hit a Turbopack bundling bug that took time to debug.

Accomplishments that we're proud of

Built and shipped a working product solo in under a week. Already caught real bugs on live production sites. 50+ developers have tried it.

What we learned

Solo developers genuinely have no affordable QA option, this is a real gap. Serverless environments have hidden constraints that don't show up locally.