Capacities capacities.io

Can AI replace Capacities?

The core loop is small enough for a capable coding agent to produce a useful local version in one sitting. For Capacities, organize linked notes as typed objects such as people, books, meetings, and ideas. The hard boundary is object-model polish, mobile capture, sync, calendar integration, and ai features, plus sync, collaboration, and capture polish.

Verdict: Bot · AI can build you a working versionBuild time: one sitting
Bot

01What it costs

$11.99/moCapacities Pro, monthly per user
$143.88per year at that price

Checked Aug 13, 2026 · source: capacities.io.

PlanMonthlyBilled yearlyWhat you get
Capacities BasicFreeFreeUnlimited spaces, objects, blocks, custom object types and devices; 5 GB media total, then 100 MB uploads/month; 100 MB/file
Capacities Pro$11.99$9.99/moUnlimited media uploads under fair use; 100 MB/file; AI, smart queries, calendar, tasks, formulas and API
Capacities Believer$14.99$12.49/moAll Pro limits/features plus beta access to major new features

Hidden costs: Paid 'unlimited' media is subject to fair use and a 100 MB/file cap. Paddle applies regional pricing/VAT, and VPN-based regional pricing is not accepted. No team or organization plan is sold.

02Could AI build it for you?

The core job: Capture linked notes as typed objects such as people, books, meetings, and ideas, search them instantly, surface backlinks, and export a normal Markdown folder.

What a working version needs:

  • macOS, Windows, or Linux
  • local folder access
  • optional sync folder chosen by the user

Editorial comparison targets the Pro plan and a personal local knowledge base DIY substitute. Recheck price before merge.

03What you'd give up

  • object-model polish, mobile capture, sync, calendar integration, and AI features
  • frictionless mobile capture
  • real-time team editing
  • hosted publishing
  • proprietary AI memory

People still pay for Capacities because people keep paying when the note system is trusted across every device and disappears into their daily capture habits. The recurring cost buys file watching, conflict handling, indexing, mobile apps, encryption, backups, and migrations, not just the visible interface.

04Free and cheaper alternatives

Anytypefree

Capacities with the same object obsession, local data and only 100 MB of free relay storage.

Versus paying: Anytype's typed-object graph is rougher to navigate and gives up Capacities' polished calendar integrations, object workflows, and built-in AI experience.

anytype.io →
SiYuanopen-source

Typed blocks, relations and database views for people who enjoy seeing the machinery.

Versus paying: SiYuan exposes blocks, attributes, and database mechanics more directly, so creating and browsing coherent object types is less elegant than in Capacities.

b3log.org →
Trilium Notesopen-source

Notes become objects through attributes, relations and reusable templates.

Versus paying: Trilium remains fundamentally tree-first, making typed objects and cross-cutting collections feel bolted on compared with Capacities' object-native design.

triliumnotes.org →

05The build prompt

Paste this into an AI coding tool (such as Claude, ChatGPT, Lovable or Replit) to build your own version.

prompt.txt
Build a personal replacement for Capacities in an empty repository.
Use Tauri 2, React, TypeScript, SQLite, and Markdown files as the source of truth; do not offer alternative stacks.
The core loop is: capture linked notes as typed objects such as people, books, meetings, and ideas, search them instantly, surface backlinks, and export a normal Markdown folder.
Make the first run work locally with one documented command.
Store all user data locally by default and make export straightforward.
Put secrets in .env, ship .env.example, and never commit credentials.
Store one Markdown file per note and a small SQLite index that can be rebuilt at any time.
Support wiki links, tags, backlinks, daily notes, pinned notes, and full-text search.
Add a fast command palette and keyboard-first create, rename, move, and link actions.
Render Markdown with task lists, code blocks, tables, and local image attachments.
Detect external file changes and show a safe conflict-resolution view.
Provide full-folder export, import, and an index-rebuild command.
Include clear empty, loading, success, and recoverable error states.
Add input validation, safe filenames, and graceful handling of unavailable APIs.
Write focused tests for the core transformation and one end-to-end happy path.
Create a README with setup, architecture, permissions, data location, and backup steps.
Do not add accounts, billing, telemetry, analytics, or a hosted control plane.
Deliberately leave out proprietary sync servers.
Deliberately leave out real-time multiplayer documents.
Deliberately leave out a plugin marketplace and hosted public sites.
Finish by running the tests and listing the exact commands used.

06Open-source starting points

  • AppFlowy: Active open-source workspace with local-first documents and databases.
Sponsor slot · openFeatured alternative to Capacities. A labeled card for one relevant tool.
Book this spot →

App prices, verdicts, alternatives and build prompts are adapted from Can I Vibecode It? (MIT License, © 2026 Rob Hallam). Each price shows the date it was checked and its source. Prices change; confirm on the vendor's site before you decide.