Atomic is a personal knowledge base that automatically connects everything you save — notes, articles, web clips, RSS feeds — into a semantically-linked knowledge graph. Unlike Obsidian or Notion, which require manual linking and folder structures, Atomic builds its own taxonomy using vector embeddings and auto-tagging, so your library organizes itself as it grows.
The tool targets researchers, writers, and developers who accumulate large amounts of information and want to retrieve and synthesize it without maintaining rigid folder systems or manual backlinks.
You add content — by writing a markdown note, pasting a URL, clipping a page via the browser extension, or subscribing to an RSS feed. Atomic embeds each piece, auto-tags it with a topic tree, and links it to related atoms. From there, you search by meaning, browse a force-directed spatial canvas, or ask the agentic chat a question scoped to a tag or your full library.
Atomic suits people who ingest large volumes of loosely related information and want the system to do the connecting work for them — particularly those comfortable with open-source, self-hosted setups. It is less suited to teams needing collaborative editing or users who want a polished, no-configuration experience, where tools like Notion or Roam with managed hosting would serve better.
Vector embeddings index every atom so searches return conceptually related notes even when the query words do not appear in the text.
LLM-generated wiki articles compile all notes and clips under a tag into a single document with inline citations linking back to each source atom.
An AI chat agent searches your knowledge base mid-conversation, scoped to a single tag or the full library, and cites specific source atoms in its replies.
A force-directed graph visualizes all atoms, clustering semantically related content so you can zoom and pan the topology of your entire library.
Dropping in any note triggers automatic extraction of topics, people, places, organizations, and events, building a tag tree without manual folder maintenance.
An MCP server lets Claude, Cursor, or any MCP-compatible client search, read, and create atoms directly without leaving those external tools.
Content enters via markdown editor, URL paste, RSS feed subscription, or browser extension web clipping, and each atom is automatically embedded on arrival.
Atomic ships a headless server mode for self-hosting so all knowledge base data stays on your own infrastructure rather than third-party cloud storage.
Pricing extracted from the product website and may change. Check the source for current details.
AtomicThis | ||||
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| Starting price | Free | $9/month | Contact sales | — |
| Pricing model | Free | Freemium | Contact sales | Freemium |
| Platforms | macOS, iOS, Web | Web | Web | Web, macOS |
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