Live

Ultrathink

Capture anything from the web into a personal knowledge base. Chrome extension, desktop widget, and web app that auto-classifies what you save.

Why we built this

Everyone loses things they’ve read. Bookmarks are a graveyard. We needed a system that captured content in one click, understood what it was (ChatGPT conversation vs Office doc vs video), and could resurface it later through natural language search.

How we built it

Three surfaces: Chrome extension for web capture, Electron desktop widget for quick save, React web app for search and organisation. OpenAI classifies content into 11 types on save, embeds it for semantic search, and stores everything in Firebase. Search works across full text and AI understanding of what you saved.

What's next

Live product with paying users at tryultrathink.com. We use it every day for research, client work, and personal knowledge management. Actively developed with new features shipping monthly. This is one of the products we’re building the company around.

Try it