How to Use Capacities in 2026: Step-by-Step Guide
Capacities is an AI-powered knowledge management tool built around objects — notes, people, books, URLs, and media are each their own entity type with custom properties. This object-based model lets AI surface semantic connections across your knowledge base that flat note-taking apps can't match. A free plan includes AI chat, daily notes, and unlimited objects.
Capacities (capacities.io) is a personal knowledge management app that rethinks the fundamental unit of organization. Traditional note-taking apps store everything as a 'note' in a hierarchy of folders. Capacities stores information as typed objects — books have ISBNs and authors, people have roles and relationships, URLs have metadata, daily notes are their own entity — and builds a knowledge graph from the relationships between these objects.
Object-based organization
The object model makes organization more natural. When you're reading a book and want to take notes, you create a Book object and attach notes directly to it — rather than a folder named 'Books' containing a note named after the book. The Book object connects to People objects (authors you've noted), other Book objects (similar reads), and any daily notes that reference it. Over time, this creates a richly connected map of your knowledge base.
AI integration
Capacities' AI assistant understands the object structure of your knowledge base. You can ask it questions about your notes ('What have I written about compound interest?'), generate summaries of specific objects ('Summarize my notes on this book'), or get suggestions for connecting related content ('What notes should I link to this new person I just added?').
The AI has access to your entire knowledge base — not just the current document — which enables more contextually relevant responses than general AI tools.
Daily notes
Like Roam Research and Reflect, Capacities emphasizes daily notes as a capture point. Each day has a dedicated space for capturing thoughts, links, and tasks. The difference in Capacities is that anything captured in a daily note can be instantly converted to a proper typed object — a mentioned book becomes a Book object, a mentioned person becomes a Person object.
Pricing
Capacities offers a generous free plan with unlimited objects, daily notes, and AI chat. The Pro plan ($9.99/month) adds collaboration, version history, and higher AI usage limits.
Frequently Asked Questions
How is Capacities different from Notion? Notion is a team workspace; Capacities is a personal knowledge management tool. Capacities has a more semantic, object-based model; Notion has broader team collaboration features. Is Capacities available offline? The Capacities desktop app works offline with local-first sync. How does the AI in Capacities compare to Notion AI? Capacities AI understands the object structure of your notes; Notion AI works on page-level content. For personal knowledge management, Capacities AI has a structural advantage.
What You'll Need
- A Capacities account (free to create)
- A modern web browser or the Capacities app
- Payment method for paid features
Getting Started
Create Your Account
Visit https://capacities.io and sign up for a freemium account. You'll need an email address to register. A free tier is available — you can upgrade later for more features.
Start Your First Conversation
Once logged in, you'll see the main chat interface. Type a question or task in the input box and press Enter. Capacities supports text — start with a simple text prompt to get familiar.
Natural Language Chat
Type your question or task in natural language. Capacities excels at understanding context and providing helpful, detailed responses.
Pro Tips
- Be specific: The more context you provide, the better the response. Instead of "write an email," try "write a professional follow-up email to a client who hasn't responded in two weeks."
- Iterate: If you don't get what you need, ask for clarification or refinement: "Make it shorter" or "Use a more formal tone."
- Use examples: Show Capacities what format you want by including an example in your prompt.
- Save useful conversations: Most platforms let you name and revisit conversations — organize by project or topic.
Common Use Cases
Productivity
AI tools for task management, scheduling, summarization, and workflow optimization.
Browse Productivity chatbots →Research & Analysis
Chatbots that help with data analysis, literature review, and in-depth research tasks.
Browse Research & Analysis chatbots →Troubleshooting
- Responses seem generic or unhelpful
- Add more context to your prompt. Specify the audience, tone, length, and format you need. Try starting over with a clearer description of your goal.
- The tool isn't responding or is slow
- AI chatbots can experience high traffic. Refresh the page and try again. Check the service's status page if issues persist.
- Output is too long or too short
- Explicitly specify the length: "in 100 words," "as a brief summary," or "in detail with examples."
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Frequently Asked Questions
- Is Capacities free to use?
- Capacities has a free tier. Paid plans start from $9.99/month.
- Do I need an account to use Capacities?
- Yes, you need to create an account to use Capacities.
- What can I use Capacities for?
- Capacities is an AI-powered knowledge management tool built around objects — notes, people, books, URLs, and media are each their own entity type with custom properties. This object-based model lets AI surface semantic connections across your knowledge base that flat note-taking apps can't match. A free plan includes AI chat, daily notes, and unlimited objects.
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