Capacities Io

Free

Dominate your note-taking and knowledge management with Capacities.io. Organize your thoughts in a flexible, interconnected way for enhanced productivity.

4.7

New AI ToolsFreeFree tier

Type

Saas

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About Capacities Io

Capacities is a knowledge management tool that organizes ideas as connected objects rather than files in folders. It allows users to create objects for people, books, projects, and ideas, link them together, and automatically surface related content. The daily note serves as an inbox for quick capture. Backlinks and Related Content help users discover connections they may have missed. The core product is free and requires no configuration, no markdown syntax, and no plugin management.

Key Features

Object-based note-taking (people, books, projects, ideas) instead of files and folders

Daily notes as an inbox for quick capture without pressure to organize

Backlinks that show every connection at a glance

Related Content automatically scans notes and surfaces unlinked references

Link anything to anything to create a living network of thoughts

No configuration, no markdown syntax, no plugin rabbit holes

Pros & Cons

Pros

Intuitive object system mirrors how the brain naturally connects ideas
Automatic connection discovery via Related Content finds insights effortlessly
Lightweight and ready to use with zero setup or configuration
Core product is free and will remain free

Cons

May not suit users who prefer traditional folder hierarchies or file-based organization
Limited customization options for power users who want plugins, custom syntax, or advanced formatting

Best For

Building a second brain for personal knowledge managementResearch and idea association for writers and thinkersProject management with connected objectives and contextCapturing and organizing daily notes, snippets, and saved linksCreating a centralized studio for everything you think, learn, and create

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FAQ

Is Capacities free?

Yes, the core product of Capacities is and will remain free. The company believes everybody should have access to tools for building knowledge.

How does Capacities differ from other note-taking apps?

Capacities organizes notes as connected objects (people, books, projects, ideas) instead of files in folders. It automatically surfaces related content and backlinks, creating a living network of thoughts.

Can I link notes together?

Yes, you can link anything to anything in Capacities. Backlinks show every connection at a glance, and Related Content even surfaces connections you already made but never linked.