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Capacities

Note-taking and knowledge management app that stores ideas as linked objects instead of files and folders.

Capacities is a note-taking and personal knowledge management app that organises information as typed objects, such as people, books, projects and meetings, linked to one another. Capacities is available on Mac, Windows, Linux, iOS and Android; the basic plan is free, and the paid Pro plan adds an AI assistant, task management and a public API.

Best for Individuals who think and write for a living and want notes on people, sources and projects to stay connected without maintaining a folder structure.

Capacities website home page
Screenshot of capacities.io, captured 9 Oct 2026
Platforms
macOS, Windows, Linux, iOS, Android, API
Pricing model
Freemium
Free plan
Yes
Free trial
Yes
API
Yes
Made by
Capacities Labs GmbH
Added

Last verified: . Information taken from capacities.io.

What is Capacities?

Capacities is a personal knowledge management app built around objects rather than documents in folders. Each note is an instance of a type, for example a person, book, project or meeting, with its own properties, and any object can be linked to any other. Backlinks list every connection, and a related-content feature points out notes that mention a topic without being linked. A daily note serves as the default place to capture thoughts. The free Basic plan covers unlimited objects, custom object types, sync across devices, offline use, full-text search and import and export. Capacities Pro adds task management, an AI assistant, calendar integration, smart queries, analysis of images, PDFs and web links, version history and a public API. The app is designed for individuals, not teams, and data is hosted in the EU.

Key Features

Object-based notes

Stores each piece of information as a typed object with properties, and lets you define your own object types.

Linking and backlinks

Connects any object to any other and shows all incoming links on each page.

Related content

Scans notes to surface passages about a topic that were never explicitly linked.

Daily notes

Provides a dated page for quick capture that can be linked to objects as you write.

AI assistant on Pro

Chats with your notes, autofills properties and analyses images, audio and web links within a monthly AI budget.

Export and offline access

Works without a connection and exports all content to standard formats.

How Capacities works

  1. Start in the daily note

    Open today's page and write freely; nothing has to be organised first.

  2. Convert notes into objects

    Give recurring things a type, such as a meeting, book or project, creating new types when required.

  3. Follow the links

    As objects accumulate links, open any one to see everything connected to it.

Use Cases

Research library
Keep sources, highlights and drafts linked for a thesis or article.
Worldbuilding for fiction
Maintain characters, places and plot notes as interlinked objects.
Meeting records
Log each meeting as an object tied to the people and projects involved.
Tasks in context
Manage tasks that stay attached to the project notes they came from.
Course notes
Organise lectures, readings and assignments across a semester.

Things to know

AI use is budgeted
Pro and Believer include a small monthly AI budget; the Plus add-on enlarges it and is required for top-ups.
Free plan media cap
Basic allows 5 GB of media uploads in total, then 100 MB per month.
Built for individuals
There are no team or organisation accounts, and no non-profit discounts.
EU hosting
Data is kept on encrypted servers in certified EU data centres, and the service is described as GDPR compliant.

FAQs

What is Capacities?

Capacities is a note-taking and knowledge management app that organises ideas as connected objects instead of files and folders.

Is Capacities free?

Yes. Capacities Basic is free and includes unlimited spaces, objects and custom object types, device sync and offline support. Media uploads on the free plan are capped.

How much does Capacities cost?

Capacities has a free Basic plan and two paid plans, Pro and Believer, with an optional Plus add-on for a larger AI budget. Current prices are on the official pricing page.

Which platforms does Capacities support?

Capacities is available on Mac, Windows, Linux, iOS and Android.

Does Capacities have an API?

Yes. A public API is included in the Capacities Pro plan.

Does Capacities offer team plans?

No. Capacities states that it is designed for individuals and does not offer team or organisational plans.

Is there a free trial of Capacities Pro?

Yes. A Capacities Pro trial can be started inside the app without a credit card.

Who makes Capacities?

Capacities is developed by Capacities Labs GmbH, an independent European company funded by its users.

Who it's for

  • Researchers
  • Writers
  • Students
  • Developers
  • Founders
  • Knowledge workers

TagsPKMnetworked notesdaily notesbacklinksAI assistantsecond brain

Used in these workflows

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