Capacities

Capacities is a note-taking tool that rethinks the foundational unit of personal knowledge management. Instead of treating every entry as a free-form text document, it introduces object types—customizable schemas that let you define what a piece of information is, not just what it says. This shift from unstructured notes to structured objects makes Capacities particularly compelling for users who want to build a lasting, queryable knowledge base rather than a dumping ground for fleeting thoughts. At its core, Capacities is a studio for your mind, as the company puts it, but that studio is less about artistic mess and more about architectural precision.

Where Capacities stands out is in its commitment to structure without sacrificing connection. The tool offers networked note-taking through contextual backlinks and block linking. Unlike many apps that simply show a list of backlinks, Capacities displays the surrounding text, saving you the cognitive load of reopening a note to remember why you linked it. Block linking goes a step further, allowing you to reference a specific paragraph or idea across multiple contexts. This granularity is a boon for researchers and writers who need to weave together disparate sources without losing the thread. The graph view, while not unique, feels purposeful here because objects—like a person, a book, or a project—have defined properties that make nodes in the graph meaningful, not just random titles.

Custom object types are the headline feature. You can create a type called 'Book' with fields for author, pages, and reading status, or a type called 'Meeting' with attendees and action items. This turns Capacities into a lightweight database, and for users who crave structure—founders tracking business ideas, managers organizing projects, developers documenting APIs—this is transformative. The learning curve is real: you have to think in schemas before you start typing. But once the framework is set, retrieval and synthesis become far more efficient than in a flat notebook. The free plan offers unlimited custom object types, which is generous, but it caps media uploads at 5 GB total and 100 MB per month thereafter—a limitation that may frustrate heavy media users.

The AI assistant, available only on the Pro plan at SGD 12.99 per month, can generate content and suggest connections. In practice, it's useful for drafting quick notes or surfacing related objects, but it's not a game-changer. The assistant lacks the deep integration of, say, a dedicated AI writing tool, and its suggestions can feel generic. The Pro plan also unlocks calendar integration, smart queries, task actions, and unlinked mentions—features that move Capacities closer to a full project management hub. However, the calendar integration is basic compared to dedicated tools like Notion or Todoist; it's fine for lightweight scheduling but won't replace a proper task manager for complex workflows.

Capacities fits best into the workflow of someone who values structure over speed. If you're a researcher building a knowledge graph of papers and authors, a writer mapping character arcs and plot points, or a founder tracking business entities and decisions, the object-oriented approach pays dividends. The daily notes feature, combined with calendar sync, makes it viable for daily planning, but the tool's strength is in long-term knowledge accumulation, not rapid capture. For that reason, it's less suited for quick-capture enthusiasts or those who prefer organic, folderless systems like Roam or Logseq.

Who benefits most? Writers and researchers who need to connect ideas across projects will find the contextual backlinks and block linking indispensable. Founders and managers can use custom object types to model their business—clients, products, tasks—and link them to daily notes for context. Developers will appreciate the API access on the Pro plan, enabling custom integrations. Students on a budget can use the free plan indefinitely, but they'll miss the AI assistant and calendar sync. The Believer tier at SGD 16.99 per month offers no extra features beyond beta access and supporting the team—a donation more than an upgrade.

Limits matter. The AI assistant is paywalled, the free plan has media caps, and the Believer tier is a hard sell. More importantly, the object-first paradigm can feel rigid if you prefer freeform writing. Import and export are supported, but migrating from a text-heavy system may require restructuring. Capacities also lacks the collaborative features of Notion or the plugin ecosystem of Obsidian. It's a focused tool for individual knowledge work, not team collaboration.

For a practical buyer, the decision hinges on whether you want to invest in schema design upfront. If you're willing to define your knowledge types and link them intentionally, Capacities offers a calm, structured environment that reduces the friction of rediscovery. If you prefer to dump first and organize later, it may feel like extra work. The free plan is a full-featured trial, so the best way to evaluate is to build a small knowledge base—say, a reading list with custom types for books and articles—and see if the structure liberates or constrains your thinking.