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Atomic

Atomic

Turn scattered notes into a connected knowledge graph

Website atomicapp.ai
Overview

What it is

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.

Intent

I need it when

Chat with a personal knowledge base without hallucination or invented information

Agentic Chat lets users converse with their notes using RAG. The system cites source atoms and does not invent information. Integration with Claude and Cursor via MCP allows AI assistants to access the user's notes directly.

Build a personal knowledge base that automatically organizes and connects ideas semantically

Atomic turns freeform markdown notes into a semantically-connected knowledge graph. Auto-tagging assigns hierarchical tags automatically, semantic search finds ideas by meaning rather than keywords, and a spatial canvas visualizes relationships as a force-directed graph where related ideas drift toward each other.

Generate comprehensive wiki articles from accumulated research notes with proper citations

Wiki Synthesis picks any tag and generates a full wiki article from every note, clip, and saved page underneath, with inline citations linking back to source atoms. Articles regenerate incrementally as new content is added, supporting proposal flows for review before publishing.

Access and sync notes across desktop, mobile, and web without losing data privacy

Atomic runs as a local-first desktop app, self-hosted server, or iOS app. Users control their own hardware and model choices. One server acts as the source of truth; every client (desktop, iOS, browser, MCP) syncs to it, enabling multi-device access while maintaining full data ownership.

Ingest web content and feeds into a searchable knowledge base automatically

RSS and URL ingestion allow users to save web pages and subscribe to feeds. The browser extension clips content directly. Saved pages become atoms tagged and embedded automatically, making web research discoverable through semantic search without manual organization.

Drop

Not a fit when

  • User requires a fully managed cloud service with no self-hosting or local setup required
  • User needs real-time collaboration features for multiple simultaneous editors on shared notes
  • User wants a proprietary, closed-source solution with vendor lock-in guarantees
  • User requires advanced team/enterprise permission management and audit logging
  • User needs integration with specific enterprise knowledge management systems or legacy databases
Commercials

Pricing

Free and open source. Desktop app, self-hosted server, and iOS app available at no cost.