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Capacities AI

Capacities is an AI-powered note-taking and personal knowledge management tool based on the concept of object-based notes, where each piece of information is ty

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  • Open source
  • Free forever
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What is Capacities AI?

Capacities is a note-taking and personal knowledge management tool that organises information using object-based notes rather than traditional folders or tags. Each piece of information you create is treated as a distinct object that can be linked, categorised, and connected to other objects, building a relational database of your knowledge. The tool includes AI features to help you write, organise, and discover connections between your notes. It's designed for people who want to build a personal knowledge system without being locked into rigid hierarchies, making it useful for researchers, writers, students, and anyone managing complex information across multiple projects.

Key features

Object-based note architecture

treats each note as a distinct entity that can be linked and related to other objects

AI-assisted writing

helps generate content, summarise information, and refine your notes

Relational connections

automatically suggests and displays relationships between related notes and information

Custom objects and properties

create custom note types and define which properties each type should have

Full-text search

quickly find information across all your notes and objects

Export and sharing

save your knowledge base in multiple formats or share specific collections

Pros & cons

Advantages

  • Open source, so you're not dependent on a company deciding to shut down or change pricing
  • Flexible object-based structure is more natural for complex knowledge than traditional folder systems
  • AI integration helps with writing and finding connections without requiring manual organisation
  • No vendor lock-in; you own your data and can export it

Limitations

  • Smaller community compared to established tools like Obsidian or Notion, so fewer templates and integrations available
  • Learning curve for setting up custom objects and understanding the relational approach
  • Limited mobile experience if the primary interface focuses on desktop or web

Use cases

Building a personal research database where articles, books, and ideas are automatically linked by topic

Managing project notes where tasks, goals, and resources stay connected in one system

Organising creative writing with characters, locations, and plot threads as separate objects that cross-reference each other

Academic work where papers, citations, and concepts need to be tracked and related to each other

Personal knowledge capture where you want to see how ideas from different areas of your life connect

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Pricing

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Free

Open source tool with access to core note-taking and object management features

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Get Capacities AI
  • Open source
  • Free forever