The fastest way to get more done with Capacities

Capacities is a connected note-taking app built on objects, not folders. Every note, person, book, and task is a typed object that links bidirectionally — so your PKM system actually connects ideas instead of burying them. In 2026 it ships AI that summarizes, asks questions across your vault, and auto-links related notes.

Who it's for: Researchers, students, and knowledge workers who outgrew folders and want a二阶 brain that surfaces connections automatically.

Key features

Objects Typed notes

Notes, people, books, and tasks are objects that link automatically — no manual wiki setup.

AI Chat Vault Q&A

Ask questions across your entire knowledge base; the AI cites the exact notes it used.

Backlinks Auto-connections

Every object shows what links to it, so related ideas surface without tagging.

Daily Notes Capture fast

Daily notes + web clipper + mobile capture keep everything in one graph.

The honest take

✓ What works

Best object-based linking of any PKM app
AI answers are cited to your actual notes
Generous free tier
Cross-platform with offline sync

✗ What doesn't

Learning curve if you're used to folders
No native canvas yet
Mobile app lags desktop
AI features need the paid plan

Verdict

Capacities earns its place in a modern AI stack for anyone who values productivity workflows done right. For Free / $12/mo it punches above its weight — and the free tier is genuinely usable. Worth a look before you commit to a heavier alternative.

💡 Transparency: This review contains affiliate links. If you sign up through our link, we may earn a commission at no cost to you. We only recommend tools we use ourselves. Full disclosure.