Why we built BrainSync
The web has become impossible to remember. The best recipe you saw on TikTok last week, the YouTube essay you bookmarked at 1am, the article a friend sent in WhatsApp last month — all of it lives in 14 different apps, none of which talk to each other, and none of which actually read the content. Bookmarks today are postcards: tiny rectangles with a thumbnail, sitting in a list, telling you nothing about what's inside.
BrainSync is what happens when you put an AI behind your bookmarks. You share a link to the app — using the same OS share sheet you already use to send things to WhatsApp — and within seconds the app transcribes any audio with OpenAI Whisper, summarizes the content with GPT, extracts a structured recipe if it's food content, and auto-categorizes it. The next time you remember "that thing about mushroom risotto", you can search by meaning, not just by keyword. Or you can ask BrainSync's AI assistant directly — "what was that podcast about productivity I saved in March?" — and it answers from your own library.
How it's different from Pocket, Raindrop, and Notion
Read-it-later apps like Pocket and Raindrop.io save the link and present a clean reading view. They don't read the content for you. Notion and Obsidian are blank canvases — you do all the writing, tagging, and organizing yourself. BrainSync sits between them: the link is saved and the work is done. Summary, transcript, tags, category — automatic. You arrive at a fully-fleshed-out note without ever touching a keyboard.
BrainSync is also the first bookmark app designed for the share sheet first, the browser second. On a typical phone, more than 80% of "interesting" content arrives via in-app share buttons (TikTok, Instagram, X, YouTube, WhatsApp forwards) — not via a desktop browser. BrainSync treats the share sheet as the primary entry point: tap share, pick BrainSync, done. No copy-paste, no separate URL field, no friction.
What BrainSync understands
- Articles & blog posts — full-text extraction with paragraph-level summaries.
- YouTube, TikTok, Instagram Reels, YouTube Shorts — full audio transcription via Whisper, then summarized.
- Podcasts — episode-length transcripts with chapter-style summary points.
- Recipes — structured extraction: ingredients list, step-by-step instructions, cook time, cuisine type.
- Google Maps places — venue metadata, neighborhood, reviews summary.
- X (Twitter) threads — full thread reconstruction with author and timeline.
- Images — OCR + AI description, so screenshots of text become searchable.
The AI chat layer
Every BrainSync user gets a personal AI assistant that has read everything they've saved. Ask "which recipes do I have that use chickpeas?" or "summarize all the productivity articles I saved last month" — the assistant draws answers from your private collection using retrieval-augmented generation (RAG), not from public training data. Your library becomes a queryable database; the AI is the query layer.
Built for sharing, not just saving
Each BrainSync user gets a public profile at brainsync.pro/yourname, where they can publish curated collections. Visitors can save your bookmarks to their own BrainSync with one tap — making it the easiest way to share a reading list or a "best of" without sending 30 links in a chat. Profiles get auto-generated Open Graph share cards, so links posted on Twitter or WhatsApp look like polished social previews instead of generic URLs.
The technology underneath
BrainSync runs on a FastAPI + MongoDB backend with a React frontend, deployed as both a Progressive Web App (PWA) and an Android Trusted Web Activity (TWA). Transcription uses OpenAI's Whisper API; summarization uses Anthropic's Claude Sonnet and OpenAI's GPT models, depending on the content type. Object storage handles cached video and image assets. Sentry-style error reporting and PostHog product analytics keep the experience tight.
The team behind it
BrainSync is built by a small independent team that uses it every day. We launched in 2025 with a single goal: make the act of "saving for later" feel as effortless as the act of forgetting. If you've ever bookmarked something and never looked at it again — which is statistically all of us — BrainSync is for you.
Get started
BrainSync is free. The free tier includes 20 AI bookmarks per month and unlimited basic saves; Pro is $4.99/month for unlimited AI processing, the AI chat assistant, and an ad-free experience. No credit card required for the free tier. Start your second brain, or see exactly how it works.