Capacities vs Obsidian: which should you choose in 2026?

Last updated May 2026

Two different answers to the same question: how should a personal knowledge base be structured?

Capacities says: everything is an object. A book is a Book. A person is a Person. A meeting is a Meeting. Each type has its own structure, its own properties, its own behaviour. You define the model, and the tool enforces it. Obsidian says: everything is a file. A book is a markdown file you linked to other markdown files. A person is a note with YAML frontmatter. A meeting is whatever you wrote down. You define nothing in advance. Structure emerges from linking.

Capacities is opinionated. Obsidian is open. The question is whether you want your tool to impose structure or stay out of the way while you build your own.

Side-by-side comparison

Where Capacities wins

The object model. This is the core idea. Create a note about a book, and it's typed as a Book. It has properties: author, date read, rating, status. Link it to a Person (the author) and that Person's page automatically shows their books. Link it to a Project and the project shows its reading list. The structure is semantic, not positional. Obsidian can approximate this with YAML frontmatter and Dataview, but it's a plugin simulating something Capacities does natively.

Lower learning curve. Capacities is opinionated in a friendly way. Object types guide you. The interface is clean. You don't need to configure plugins, learn Dataview syntax, or design a folder hierarchy. The model tells you what to do. Obsidian gives you a blank slate and says "good luck."

Daily notes with object integration. Capacities' daily notes are integrated with the object system. Mention a person, and it links to their object. Reference a book, and it connects. The daily note is a capture surface that feeds the knowledge graph automatically. Obsidian's daily notes are markdown files that only connect if you create links manually.

Calendar integration. Google Calendar events on Pro become objects in Capacities automatically. A meeting gets its own object with date, attendees, and notes. Obsidian has calendar plugins, but the integration isn't native.

Design. Capacities is visually polished. The interface feels intentional. Object pages look like structured profiles. Obsidian's default appearance is functional. Beautifying it requires themes and CSS.

Free tier generosity. Unlimited notes and objects with 5GB media storage on the free plan. Core features work without paying. Obsidian is also free for personal use, but sync costs $4-5/month. Capacities includes sync for free.

Where Obsidian wins

Flexibility. Obsidian makes no assumptions about your content. A note can be anything. A link can mean anything. There's no schema to learn, no object types to define, no properties to configure unless you want them. If Capacities' model doesn't match how you think, you're stuck. If Obsidian's blank canvas doesn't match how you think, you install a plugin that makes it match.

The plugin ecosystem. 1,600+ community plugins versus zero. Citation management, kanban boards, spaced repetition, calendar integration, Dataview queries, custom CSS themes, local LLM integration. Capacities has its object model and that's it. Obsidian has anything anyone has ever built.

Canvas. Obsidian Canvas provides a spatial canvas for visual thinking. Arrange notes, cards, and images spatially. Capacities has no canvas.

Long-form writing. Obsidian's markdown editor is built for writing long documents. Headings, paragraphs, embedded images. Capacities' editor is cleaner for short notes and object pages but less suited for long-form content.

Data ownership. Plain markdown files on your device. No cloud dependency. No vendor lock-in. Capacities is cloud-hosted with offline access, but your data lives on Capacities' servers.

Graph view customisation. Both have graph views. Obsidian's is more customisable: filters, colour groups, force-directed layout, local graph view.

Linux support. Obsidian runs on Linux. Capacities doesn't.

Community size. Obsidian's community (250K+ subreddit, active Discord, YouTube ecosystem) dwarfs Capacities'. More tutorials, more shared workflows, more help when you get stuck.

Dataview. For users willing to learn it, Dataview turns Obsidian into a queryable database. Filter notes by frontmatter properties, create dynamic tables, build dashboards. More powerful than Capacities' built-in queries, but with a steeper learning curve.

Where both fall short

Both are text-first. Neither deeply handles video, audio, slide decks, spreadsheets, or saved web articles as searchable, indexed content. PDFs are attachments in both. If your knowledge lives in more than text, both store the files but don't understand what's in them.

Neither has semantic search. Capacities has text search and smart queries. Obsidian has fast full-text search. Neither searches by meaning, by visual similarity, or inside embedded files.

Both require manual structure. Capacities asks you to define object types and assign properties. Obsidian asks you to create links and configure plugins. Both are systems you build and maintain. The approach differs. The effort doesn't.

Neither connects to your content elsewhere. Capacities integrates with Readwise and Google Calendar. Obsidian has plugin-based integrations. Neither pulls in content from Google Drive, Dropbox, email, or other services and makes it searchable alongside your notes.

Neither has collaboration. Both are single-user tools. If you work with other people, you need a separate tool for that.

A third approach: structure without the building

Capacities asks you to define object types. Obsidian asks you to build a link graph. Both assume you're the architect. Fabric doesn't.

Fabric is an AI workspace where everything you save is automatically extracted, enriched, and understood by the AI assistant. You don't define object types or configure Dataview queries. You save content, any file type, and the Memory Engine maps relationships automatically. Semantic search finds things by meaning. The AI understands your entire library without you creating the schema.

Fabric doesn't have Capacities' typed object model or Obsidian's plugin ecosystem. It doesn't have a graph view. It takes a different position: save things, let the AI handle the structure. If you want to design your own knowledge architecture (Capacities' objects or Obsidian's links), those tools give you the control. If you want the understanding without the architecture, Fabric gives you that.

See the full comparisons: Fabric vs Capacities and Fabric vs Obsidian.

How to choose

Use Capacities if you think in objects and relationships. You want a structured personal knowledge base where every piece of content has a type, properties, and linked relations. You like the idea of your tool imposing a model that guides how you organise. You want a clean interface with a generous free tier. You work alone and don't need plugins, canvas, or long-form writing tools.

Use Obsidian if you want maximum flexibility. You think in text and links. You want 1,600+ plugins, a spatial canvas, full data ownership with local markdown files, and a community that has built a solution for almost any workflow. You're willing to invest setup time. You want to design the system yourself, not have a model imposed on you.

Try Fabric if you don't want to define object types or build a link graph. You want AI that understands your content automatically, search by meaning across all file types, and a workspace that handles more than text. No schema to design. No plugins to configure. Save things and ask questions. Generous free plan. See also: best second brain app.

FAQs

Is Capacities easier than Obsidian?

Yes. Capacities has a lower learning curve. The object model guides you. Obsidian's blank canvas requires you to design your own system, which takes hours of configuration. Both have learning curves, but Capacities' is shorter.

Does Obsidian have object types like Capacities?

Not natively. YAML frontmatter properties per note, combined with Dataview queries, can approximate object-like behaviour. But it's a plugin simulating what Capacities does natively. The experience is more technical and less integrated.

Which is better for a personal knowledge base?

Both are built for exactly this. Capacities for people who think in structured objects and relationships. Obsidian for people who think in freeform text and links. Fabric for people who want the knowledge base to organise itself.

Does Capacities have an API?

Yes, on Pro. Limited but available. Obsidian has no official API, but community tools and plugins provide integrations.

Can I use both?

Technically yes, but they use different models. There's no sync between them. Some people experiment with both and settle on whichever matches their thinking style.

Which is more future-proof?

Obsidian's local markdown files are readable by any text editor forever. Capacities is a small, self-funded company with cloud-hosted data. Both carry different risks. Obsidian's risk is plugin maintenance (community-dependent). Capacities' risk is company longevity (small team, no VC). Fabric's risk is internet dependency (cloud based). Every tool has a trade-off.