ThreadLens

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  homepage to enter reddit url

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  extension

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  reddit thread analysis

Inspiration

500 comments. 30 minutes of scrolling. Still no idea what people actually think. Sound familiar? We built ThreadLens because Reddit is a goldmine of real opinions - but digging through it shouldn't feel like a part-time job.

What it does

Paste a link. Get clarity. ThreadLens gives you:

• TL;DR that captures the real vibe
• Sentiment Score - happy crowd or angry mob?
• Consensus Check - agreement or chaos?
• Key Opinions with actual quotes
• Health Score - is this thread worth your time?
• Foru.ms Sync - save it forever

Plus a Chrome Extension so you never leave Reddit.

How we built it

• Next.js 15 + TypeScript + Tailwind for the frontend
• Gemini 2.5 Flash for AI analysis
• Foru.ms API for permanent storage with rich metadata
• Chrome Extension (Manifest V3) for seamless Reddit integration

Challenges we ran into

• Reddit's API rate limits and CORS headaches
• Getting AI to use real quotes, not hallucinations
• Chrome Extension CSP being... itself

Accomplishments that we're proud of

The Discussion Health Score - a unique metric no one else has. One number tells you if a thread is productive or a dumpster fire.

What we learned

• Foru.ms extendedData is incredibly powerful for storing structured metadata
• Prompt engineering is an art - specificity matters
• Manifest V3 requires rethinking traditional extension patterns

What's next for ThreadLens

• Compare threads side-by-side
• Track opinion shifts over time
• Expand to Twitter, HackerNews, Discord

Built With

• chrome
• foru.ms-api
• google-gemini
• next.js
• react
• shadcn-ui
• tailwind-css
• typescript
• vercel-ai-sdk