Atomic

In plain words

Atomic is a local-first, AI-augmented personal knowledge base that stores and organizes information on user-controlled servers. It serves individuals who want to build and manage their own knowledge systems with AI assistance. The product features cross-platform apps for iOS, Android, web, and desktop, a markdown editor with live preview, an AI agent chat toolkit, and content ingestion via RSS feeds. It is open-source under the MIT license and supports self-hosting.

written from the facts on this page · September 2026

From the sources

Atomic is a self-hosted, AI-native knowledge base. Write notes, get a semantic graph. Ask questions, get cited answers from your own content. Auto-generates wiki articles as your knowledge grows. MCP server built-in for Claude/Cursor. Local-first. Open source. Everything you know, connected.

A personal knowledge base that turns freeform notes into a semantically-connected, AI-augmented knowledge graph.

Self-organizing notes with semantic search, wiki synthesis, and agentic chat — all open source. Run it as a desktop app, or self-host a server and sync every device. Your notes, your hardware, your model. Free to start · 14-day Pro trial · no card required. Or self-host the server , grab the iOS app , or star it on GitHub (★ 1.6k) Pick a tag. Get a wiki article — with citations back to the notes that wrote it. Chat with your notes. It cites them; it doesn't invent them. A force-directed map of your thinking. Related ideas drift toward each other on their own. Plug it into Claude or Cursor. Your notes, in your agent's hands. Pick any tag. Atomic generates a full wiki article from every note,…from atomicapp.ai

In the maker’s words, at launch

Hey HN - I first posted about my knowledge base product, Atomic, here around a month ago; since then, a viral tweet by Karpathy has produced a torrent of AI powered knowledge base projects. meanwhile I've been shipping like crazy, here are some of the new features shipped in the last month: - Rebuilt the iOS app with…

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