Atomic

Atomic is a self-hosted or cloud-hosted knowledge management tool that organizes notes as "atoms"—markdown entries automatically tagged, embedded, and linked by semantic similarity. It offers semantic search to find ideas by meaning rather than keywords, wiki synthesis to generate cited articles from tagged notes, and an agentic chat interface that queries your knowledge base without hallucination. The tool runs as a desktop app, iOS client, or self-hosted server synced across devices, with integrations for Claude and Cursor via MCP.

Designed for individuals managing personal knowledge, Atomic emphasizes end-to-end ownership: your data stays on your hardware or your own server. Features include a spatial canvas visualization of connected ideas, auto-tagging powered by LLMs, RSS feed ingestion, browser extension for web clipping, and scheduled reports. The project is open source and available on GitHub.