Capacities review: object-based notes for structured thinkers

Most note apps put your ideas in folders. Capacities throws the folders away and asks you to think in objects instead — a note about a book is a Book, a note about a colleague is a Person, and they link to each other automatically. It is an unusual idea that has earned a devoted following among researchers and knowledge-workers. This review answers the practical questions: what the object model actually buys you, who it suits, and whether any of the paid plans are worth your money.

What Capacities actually is

Capacities is a personal knowledge-management app built around typed objects rather than files and folders. Every note is an object with a type — Person, Project, Book, Meeting, or one you invent — carrying its own properties and linking to other objects to form a connected web of information.

A daily note sits at the centre as your capture hub, and a graph view shows how everything joins up. It runs on the web, desktop, iOS and Android, works offline, and layers optional AI features and integrations on top. Think of it as sitting between the free-form flexibility of Obsidian and the database-driven structure of Notion.

Who it’s for

Capacities suits people who think in connections and want structure without building a database by hand. It is a personal tool first, so the fit depends on how you work.

If you’re a researcher or PhD student juggling papers, authors and concepts, the object model lets you link a quote to its source, its author and your own argument in seconds. If you’re a writer or content creator, typed objects for ideas, characters and references keep a sprawling project navigable over months. If you’re a lifelong note-keeper building a “second brain”, the generous free plan and offline-first design mean your knowledge base can grow for years without a bill.

If, on the other hand, you need a shared workspace where a team edits the same docs live, Capacities is the wrong tool — that is simply not what it does.

Where it shines

Capacities’ strongest asset, echoed consistently across reviews, is the object model itself — reviewers repeatedly describe notes-as-objects as matching how the brain actually organises information, rather than forcing thoughts into rigid folders (fahimai). That structure, combined with automatic backlinks and a graph view, is what users say makes their notes feel connected rather than scattered.

The design draws near-universal praise. Reviewers single out the clean, calm, distraction-free interface and its light and dark modes as a reason they keep coming back (fahimai). The free tier is another recurring highlight: unlimited objects and blocks plus 5GB of media is unusually generous, and several reviews rate it among the best free plans in the category (costbench).

Users also credit the team’s pace: Capacities ships updates frequently and visibly responds to feedback, so reviews describe an app that keeps getting better. Sentiment is warm without being uncritical — one in-depth 60-day review scores it 4.2 out of 5 (fahimai).

Where it frustrates

The most common complaint is the learning curve. Because the object model is genuinely different from folders, reviewers note it takes a few days to adjust before it clicks (fahimai). This is friction at the start rather than a permanent flaw, but it is real and worth budgeting for.

Importing is the other sore point. Moving an existing library in from another app is described as not easy yet, which raises the switching cost if you already have years of notes elsewhere (fahimai). And collaboration is simply absent — there is no live co-editing, so reviewers are explicit that teams should use Notion instead. None is a dealbreaker for a solo user, but together they mark the app’s edges.

Is it worth paying for?

For most individuals, the honest answer is that you may never need to pay — and that is a point in its favour. The free plan covers unlimited objects and blocks, offline access, custom object types, full-text search and 5GB of media (costbench), which is enough to run a serious personal knowledge base indefinitely.

Pro, from around $9.99 a month and about 16% cheaper billed yearly (Capacities), adds the productivity layer: task management, the AI assistant, calendar integrations, smart queries, table formulas, API access and effectively unlimited media uploads. It is worth it if you lean on those features daily — particularly the AI and integrations — and not otherwise.

Believer, from around $12.49 a month, matches Pro but adds early access to new features — it is really for enthusiasts who want to support development (costbench). A student discount is also available. The sensible path: start free, and upgrade to Pro only when you hit a feature you genuinely miss.

Capacities vs the alternatives

Short version: choose Capacities if you want structure that links itself without building databases; choose Notion if collaboration and all-in-one workspaces matter most; choose Obsidian if owning local files is non-negotiable; and choose Tana if you live in outlines and want maximum power. Capacities wins on the middle ground between free-form and rigid.

FAQ

Is Capacities free? Yes — there is a genuinely useful free plan with unlimited objects and blocks, offline access and 5GB of media. You only pay for Pro features like the AI assistant, integrations and task management.

Does Capacities have a mobile app? Yes. Alongside web and desktop, it has dedicated iOS and Android apps, and it works offline with syncing.

Is it good for teams? No. Capacities is individual-first with no real-time co-editing, so teams that need shared, simultaneous editing are better served by Notion.

How hard is it to switch from Notion or Obsidian? The object model takes a few days to learn, and importing existing notes is still clunky — plan for some manual tidying if you are migrating a large library.

The bottom line — should you buy it?

If you are an individual who thinks in connections — a researcher, writer or dedicated note-keeper — Capacities is well worth trying, and you should start on the free plan today: it is generous enough to run a real second brain at no cost. Upgrade to Pro only once you find yourself reaching for the AI assistant, integrations or task features. Skip it entirely if you need live team collaboration, where Notion remains the better home.

Capacities scores a solid 7.7/10 — held back by import friction and the absence of collaboration, but distinctive, beautifully made and unusually generous where it counts.

Sources: pricing structure verified against Capacities’ official pricing page and costbench’s Capacities pricing breakdown; annual discount and plan detail cross-checked against spotsaas; features, user sentiment, pros and cons synthesised from fahimai’s Capacities review and AIapps’ Capacities review.