Atomic
A personal knowledge base that turns freeform notes into a semantically-connected, AI-augmented knowledge graph.
What is Atomic?
Atomic is an AI Writing tool. A personal knowledge base that turns freeform notes into a semantically-connected, AI-augmented knowledge graph. Atomic is freemium: it has a free plan plus paid upgrades. A free trial of 14 days is available. It is available on macOS, Windows, Linux and iOS. It is aimed at developers, knowledge workers and researchers.
Atomic is a self-hosted, AI-native knowledge base that organizes freeform notes into a semantically-connected knowledge graph. It enables semantic search, wiki synthesis, and agentic chat features. Designed for developers and knowledge workers, it offers a local-first approach with open-source flexibility.
Built for developers, knowledge workers and researchers.
Features
Semantic Search
Search by meaning, not strings.
Wiki Synthesis
Agentic Chat
Spatial Canvas
Auto-Tagging
MCP Integration
Everything is an Atom
Daily Briefing
Local-First Architecture
Open Source
Free and open-source software with end-to-end control.
Use cases
- Organize freeform notes into a semantically-connected knowledge graph
- Search by meaning rather than keywords
- Generate wikis from personal notes
- Engage in agentic chat for knowledge exploration
- Visualize knowledge in a spatial layout
- Automatically tag notes for better categorization
Who it's for
Pros & cons
Pros
- Free plan available
- Public API available
- Open source and end-to-end control
Cons
No documented limitations yet.
Pricing
Freemium. Free trial of 14 days available.
| Plan | Price |
|---|---|
| Free | Free |
| Pro | $12 |
Integrations
Developer & API
Public REST API available
- Authentication
- Bearer Token
- SDKs
- Python, Node.js, Ruby, PHP
Open source· MIT· 2K stars· 144 forks
FAQ
What is Atomic?
Atomic is an AI Writing tool. A personal knowledge base that turns freeform notes into a semantically-connected, AI-augmented knowledge graph. Atomic is a self-hosted, AI-native knowledge base that organizes freeform notes into a semantically-connected knowledge graph. It enables semantic search, wiki synthesis, and agentic chat features. Designed for developers and knowledge workers, it offers a local-first approach with open-source flexibility.
Is Atomic free?
Atomic has a free plan; advanced features require a paid plan.
How much does Atomic cost?
Atomic offers 2 plans: Free (Free) and Pro ($12).
Does Atomic have an API?
Yes, Atomic offers a public REST API for building custom integrations.
What platforms does Atomic support?
Atomic is available on macOS, Windows, Linux and iOS.
Who should use Atomic?
Atomic is built for developers, knowledge workers and researchers. Common uses: organize freeform notes into a semantically-connected knowledge graph, search by meaning rather than keywords, generate wikis from personal notes and engage in agentic chat for knowledge exploration.
What does Atomic integrate with?
Atomic integrates with Anthropic.
Is Atomic open source?
Yes, Atomic is open source under the MIT license.
What are the best alternatives to Atomic?
Similar tools on AiByts include Bibby AI, Nexus AI, Quarkdown, aiApply and Netus AI.
Atomic news & updates
Details are compiled from Atomic's website and public sources, last verified Oct 5, 2026. Features and pricing change — confirm on the official site before you buy.
Try Atomic
Freemium
Tags
- Knowledge Graph
- Semantic Search
- Open Source
- Local-First
- Wiki Synthesis
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