Capacities

AI-powered studio for your notes and knowledge Pricing: Freemium. See pros, cons, alternatives, and comparisons.

Open Source
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Web, macOS, Windows, iOS, Android
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AI Tools for Knowledge ManagementWritingResearch

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Open source
Free forever

What is Capacities?

Capacities is a note-taking and knowledge management tool that integrates AI features to help you organise, connect, and retrieve information. It sits somewhere between a traditional notes app and a personal knowledge base, letting you store text, images, and other content whilst AI assists with organisation and search. The tool is designed for people who want to build a structured personal knowledge system without managing complex database setups. It works particularly well for researchers, students, writers, and professionals who accumulate information across projects and need a way to keep it accessible and linked together.

Key features

AI-assisted note organisation

automatically categorise and tag your notes based on content

Knowledge graph visualisation

see connections between your notes and ideas visually

Full-text search with AI understanding

find what you need even if you don't remember exact wording

Template system

start new notes with predefined structures for consistency

Markdown support

write and format notes using standard markdown syntax

Cross-linking

manually connect related notes to build a personal knowledge network

Pros & cons

Advantages

Freemium model means you can try the core functionality without paying
Focused design that avoids overwhelming complexity found in some alternative tools
AI features work within the app rather than requiring external integrations

Limitations

Limited information about offline access and data export options
Smaller community compared to established tools like Obsidian or Notion, so fewer templates and plugins available
Free tier likely has storage or feature limits that may require upgrade for serious users