ThoughtOS is your second brain for AI. It turns scattered chats, notes, preferences, and decisions into a living memory system your assistant can actually use. Less repetition, better follow-through, and an AI that actually grows with you.
Your goals, style, relationships, open loops, and hard-won insights disappear between sessions. Every conversation is a blank slate.
You’ve explained your preferences, your team, your architecture a dozen times. Each new session, you start from zero.
Knowledge trapped in one app. Switch from ChatGPT to Claude? Everything you’ve taught it stays behind.
Your AI helped you decide on an approach last week. This week, it doesn’t know the decision exists.
We built ThoughtOS because the AI industry has a memory problem. Every platform creates a walled garden around your knowledge. You invest weeks building context with one tool — then a better model drops and you start from zero.
ThoughtOS is a second brain for AI agents — a portable, self-owned memory layer that sits underneath all your AI tools. It connects via MCP, the universal protocol for AI tool interoperability, so every agent you use can read from and write to the same persistent knowledge base.
Unlike traditional second brain apps built for human note-taking, ThoughtOS is designed for cross-tool AI context sharing. Your memory should follow you to the tool you want to use — not the other way around.
ThoughtOS processes every piece of knowledge through a five-stage pipeline that classifies, embeds, and connects your memories automatically.
Decisions, facts, insights, and preferences flow in naturally through conversation.
AI categorizes each memory: decision, insight, preference, person, or project.
Vector embeddings capture semantic meaning for intelligent retrieval.
Connections form between related memories, building a knowledge graph.
Semantic search finds the right memory at the right time, from any agent.
Not to one app, one platform, or one session. ThoughtOS is the memory operating system for your life and work.
Your assistant retains important context across every session.
Preferences and patterns compound over time.
Ideas, people, and decisions stay connected.
Your memory belongs to you, not one app or session.
ThoughtOS isn’t just storage. It captures what matters, organizes it automatically, and makes it instantly retrievable through conversation. Think of it as a second brain that turns context into continuity.
Find memories by meaning, not keywords. Powered by pgvector with HNSW indexes for blazing-fast similarity search across your entire knowledge base.
Every memory has a health score based on freshness, usage, verification, dependencies, and neighborhood. Aging memories surface for review before they decay.
ThoughtOS doesn’t just store — it thinks. Automatic synthesis detects emerging patterns and surfaces insights you might have missed.
Your memories aren’t locked to one AI. Claude connects via MCP, ChatGPT via REST API. Same brain, any agent, any device.
Memories move through Active, Aging, and Retired states. Pin critical knowledge to keep it evergreen. Retire outdated facts automatically.
Organize knowledge into topics and control visibility with spaces. Structure emerges naturally from your workflow.
ThoughtOS runs locally on your machine and connects to a cloud PostgreSQL brain. No vendor lock-in, no proprietary protocols.
35 MCP tools via stdio
REST API via Vercel
Open protocol, open brain
Node.js / TypeScript
Runs locally on your machine
Classification & embedding pipeline
Serverless Postgres + pgvector
text-embedding-3-small (1536d)
Classification & synthesis
Across chats, apps, and days.
You bounce between ChatGPT, Claude, and a dozen other tools daily. ThoughtOS makes sure every client preference, brand decision, and creative thread follows you everywhere — no re-explaining, no lost details.
Events, projects, and relationships generate mountains of context. ThoughtOS catches conflicts before they become crises and surfaces the detail you captured three weeks ago — right when you need it.
When you’re the solo IT pro for 140 people, you can’t afford to forget a fix that worked two years ago. ThoughtOS turns your troubleshooting history into institutional memory that never leaves — even if you do.
Deploy ThoughtOS across your team. Each person gets their own brain with their own context. Institutional knowledge lives in the system, not in someone’s head — onboard new hires in minutes, not months.
Capture a decision in one tool, then recall it from any other. This is what a session with ThoughtOS looks like.
Your second brain runs on free tiers and open protocols. You choose every piece of the stack — from zero-cost to enterprise-grade. It’s your knowledge, built your way.
One example of many
| Component | Monthly Cost |
|---|---|
| Serverless Postgres (Neon/Supabase) | $0.00 |
| Embeddings (~20 thoughts/day) | $0.05 - $0.15 |
| LLM calls (classify + extract) | $0.05 - $0.15 |
| Total | $0.10 - $0.30 |
Every component is yours to choose. Start free with open-source tools, scale up with managed services, or bring enterprise infrastructure you already pay for. ThoughtOS is a specification — you decide what powers it.
Whether you want early access, consulting, or a done-for-you deployment — we’d love to hear from you.