Product overview

Note-taking that works the way you think

Capacities brings together connected note-taking and structured data, without the complexity you'd expect. Easy to get started with, and powerful enough to grow with you for years.

Join 50,000+ active knowledge workers

App overview showing object types in sidebar and workspace
Objects

Your notes become real things

In Capacities, you don't create files—you create objects. People, books, projects, ideas. Each with its own structure, properties, and place in your knowledge network.

Custom types

Create any kind of object. A recipe. A company. A research paper. A movie you watched. You define what matters.

Properties

Add dates, ratings, tags, links, numbers, checkboxes—whatever makes sense for that type.

Templates

Create a template for how new objects should look. Every new book, meeting, or project starts exactly how you want.

Multiple views

Switch between lists, galleries, tables, or cards. The same data, visualized however works best for you.

"The whole idea of everything being an object works for me. Object-oriented is definitely the way to go!"

Person

Lena Brandt

Tags

Leads marketing for the Spring Launch. Likes a short written summary before every call.

Linked from

  • Weekly sync with Lena
  • Thursday, Oct 15

Networked Notes

Ideas connect like thoughts in your head

Link anything to anything. Watch your knowledge come alive.

Bi-directional links

Type someone's name or reference a project, and Capacities creates a two-way link automatically.

Backlinks panel

Open any object and instantly see every other object that references it. Connections you forgot you made, surfaced automatically.

Graph view

See your entire knowledge network as a living graph. Explore connections. Spot clusters. Find unexpected patterns.

Tags that work

Unlike other apps, tags in Capacities work across your entire system—not siloed in single databases.

"It felt magical the first time a connection surfaced that I hadn't made consciously."

— Discord user
Daily note Linked to 0 objects

Thursday

15 October 2026

Graph view

Already in your space, linked to what you just mentioned

A daily note types itself. Each name it links, such as Maya Chen, Spring Launch, the book Deep Work, and Lena Brandt, appears in the graph below it. Objects that were already linked to Spring Launch, such as the pricing call and the Q3 roadmap, show up too.


Daily Notes

Your inbox for thoughts

Every day starts fresh. Write what's on your mind, and let the connections build over time.

Daily ritual

One note per day. The simplest way to build a knowledge habit.

Quick capture

Send thoughts via WhatsApp, Telegram, or email—they appear in your daily note automatically.

Timeline view

See how your thinking evolves day by day. Your daily notes become a timeline of your intellectual life.

Automatic threading

Every object you create gets timestamped and linked to the day.

"The daily notes became a ritual—and then I saw how they stitched together all my scattered thoughts."

Daily note view with inbox for thoughts

Editor

Write beautifully. Think clearly.

A distraction-free editor that gets out of your way, but has power when you need it.

Block-based editing

Headings, lists, toggles, quotes, math blocks, code blocks, tables: organize your thoughts visually.

Editing shortcuts

Type / for commands, use common markdown shortcuts for formatting. Optional for everyone, powerful for those who want it.

Code block with syntax highlighting

100+ languages. Auto-complete. Mermaid diagrams. Bracket pairing. Line numbers.

Embeds

Images, PDFs, audio, video—embed them directly in your notes.

"That's the reason I love Capacities - instead of figuring out workflows, learning lots of plugins, or how to sync notes on my phone, I can just simply write and focus on what matters. Like Apple Notes, but more powerful yet simple."

Rich text editor with block menu open

Media

Not attachments. Sources you can think with.

Every PDF, photo, recording, and saved link is its own object, on every plan. Tag it, link it, and write beside it. With Pro, Capacities reads what's inside.

See everything Pro does with media
A PDF with colored highlights, and its page in Capacities where each highlight is a note
AI Connectors

Your AI understands it too

Because every note knows what it is, an AI can make sense of it. Connect ChatGPT or Claude, and they read from your space and add to it.

Works with the AI you already use

ChatGPT, Claude, Le Chat, and more connect in a few clicks. No new app to learn.

Reads and writes

It searches your space for context and adds new notes, linked to where they belong.

You stay in control

Each connection reaches only the space you pick, and version history undoes any change.

See how it works with your AI chats

Turn my kitchen notes into a project in Capacities, with the next steps as tasks.

  • ReadKitchen ideas
  • ReadCall with the plumber
  • CreatedRenovate Kitchen
  • Added 3 tasks toRenovate Kitchen

Done. "Renovate Kitchen" is in your space with three tasks: get plumbing quotes, find a worktop supplier, and declutter before the 14th. I linked the plumber call so the quotes stay in context.

AI Assistant

And inside Capacities, an assistant that knows your notes

Open the AI chat beside any page. It reads what you point it to, follows the links, and suggests changes you approve.

Chat with your notes

Mention a note with @, or let it search your space. It reads, follows connections, and can search the web.

Changes you approve

It creates objects, tasks, and queries, updates properties, and rewrites blocks. Review each change, or turn on Auto-approve.

Help while you write

Summarize, translate, or improve a passage from the AI panel, or type /Ask AI anywhere in a note.

See everything Pro does with AI

What the assistant can do

  • Search your notes
  • Follow links
  • Search the web
  • Create objects
  • Create tasks
  • Build queries
  • Update properties
  • Edit blocks
  • Find and replace
  • Calendar events
  • Summarize
  • Translate
  • Improve writing
  • Auto-tag notes
  • Fill in properties
  • Generate images
  • Read text in images

Pick a model from OpenAI, Anthropic, Google, or xAI. Read the AI docs

Task management

Tasks that remember what they're for

Write a task in a meeting note or on a project page. It shows up on your task dashboard and stays linked to where it came from, so the context is one click away.

Written where the work happens
Meeting

Weekly sync with Lena

Today, 10:00Lena Brandt

Lena wants the new timeline before the board call on Friday.

•Photographer is still not booked.

•Pricing copy is almost done.

Send Lena the revised launch timeline
New task

Decisions

•Launch moves to May 12.

•Lena owns the press list.

Shows up on the project
ProjectSpring Launch
Content Tasks
Final pricing page copy
Send Lena the revised launch timeline
Book the launch photographer
And on Today, when it's due
Tasks Today
Renew the domain
Send Lena the revised launch timeline
Water plants

Works with what you already use

Send a thought from WhatsApp, pull in your Kindle highlights, see today's meetings, and push tasks to your task app. It all meets in your daily note.

Capture

Reading

Tasks

Calendar

Daily note Live

Thursday

15 October 2026

  • Book a table for Maya’s birthdayFrom WhatsApp · 08:12
  • Ask Maya about the photographerQuick note from Raycast
  • How to run a pre-mortemHighlights from the web
  • Pick up the printed bannersSent to Things

Messages from WhatsApp and Telegram, highlights from Readwise, Kindle, and Web Highlights, and events from Google Calendar and Outlook arrive in today's daily note. Tasks go out to Todoist, Things, TickTick, Apple Reminders, Google Tasks, and Microsoft To Do.

"I love using WhatsApp to fire anything that comes into my mind for my daily note. So handy."

Your thoughts, protected

We're a European company, and your notes are what we look after. They are never sold, never used for ads, and kept apart from our day-to-day development.

  • Live dataEU servers
  • Daily backupEncrypted · second site
  • Daily backupEncrypted · third site

Hosted in the EU, backed up every day

Your notes live on certified servers in the EU. Every day they are copied to encrypted disks in several European locations. GDPR protections apply to every user, wherever you live.

You Server
In transit · TLS At rest · encrypted disks

Encrypted on the way and at rest

Every connection uses TLS, and your notes and files sit on encrypted disks. Files are only reachable through signed links.

482913
Code from your authenticator app

Only you get in

Turn on two-factor authentication with any authenticator app. Backup codes keep you in if you lose your phone.

WorkAI on
JournalAI off
No trainingNo storage

AI only where you allow it

AI is opt-in, space by space. Providers never train on your content and don't keep it after answering.

  • My space Daily, 12:00
  • People
  • Lena Brandt.md
  • Books
  • Meditations.md
  • Books.csv
  • Media

Yours to take with you

Export your whole space to Markdown, CSV, and media files, with links intact. Schedule it, and a fresh copy lands on your computer.

How we protect your data

"Not all software 'export' features are created equal. The folks at Capacities did it right."