Comparison
The short version
Capacities calls itself a studio for the mind, and the idea is elegant: every note is a typed object, a person, a book, a meeting, an idea, each with its own properties, all connected into a network. Mindly takes a different path. It is a native Mac second brain where one shortcut captures anything and AI organizes it for you, so you never design an object model in the first place.
The trade is structure versus automation. In Capacities you decide how knowledge is shaped: object types, fields, links, and views. That structure is the appeal if you enjoy modeling your thinking. In Mindly the structure forms on its own. Every save is tagged, summarized, and connected in seconds, and a mind map shows how it all fits, with nothing to configure first.
There is also the matter of where things live. Capacities is a cloud tool that syncs across web, desktop, and mobile. Mindly is Mac-native, and your library sits in a folder on your own machine. If you want a polished object system you build yourself, Capacities is a fine choice. If you want a second brain that organizes the moment you press the shortcut, Mindly is the fit.
Capacities at a glance: Capacities is the right call when you enjoy modeling knowledge as typed objects with properties and want that system on web, desktop, and mobile.
The context
Capacities deserves its reputation. The object model is genuinely thoughtful: people, books, meetings, and ideas each get their own type, and the design around them is calm and pleasant to use. If modeling your knowledge feels like part of the thinking, few tools do it with as much care. Most people who consider leaving are not leaving because Capacities is bad. They are leaving because of what the model asks of them.
The friction is the model itself. Every save invites a decision: what type is this, which properties does it need, where should it link. That is rewarding for deliberate notes and heavy for the everyday stream of links, screenshots, and half-formed thoughts. When saving something takes thought, some things never get saved. And your library lives in the Capacities cloud, which not everyone is comfortable with for a personal archive.
Mindly removes both decisions. One shortcut, ⌘M, captures notes, links, PDFs, files, screenshots, and voice, and AI tags, summarizes, and connects each save on its own. There are no types to choose and no properties to fill in. Your library lives in a folder on your Mac, exportable to standard formats, with no account needed. The structure still emerges. You just do not have to build it.
Side by side
| Topic | Mindly | Capacities |
|---|---|---|
| Built for | One person on a Mac who wants capture and organization to be automatic. | People who like a structured, object-based way of organizing knowledge in the cloud. |
| Capture | One shortcut captures notes, links, files, voice, video, and screenshots. Everything lands as items in one library. | Create a note or a typed object, then fill in its properties. Capture is tied to the object model. |
| Organization | AI tags, summarizes, and connects every save automatically. No model to design. | You define object types and properties and link them into a network. The structure is yours to build. |
| Where your library lives | On your Mac, in a folder you own and can export. | In the Capacities cloud, synced across web, desktop, and mobile. |
| Visualization | Interactive mind map for the ideas that actually connect | A network of linked objects. No spatial mind map of ideas. |
| Chat with your documents | Open any note or PDF and chat with it. Answers are grounded in that item, and related saves are surfaced. | Offers AI assistance, but not document-grounded chat across a mixed library the same way. |
| Mixed media | Notes, links, PDFs, screenshots, and voice memos all live and connect in one library. | Strong for typed notes and references. Less of a catch-all for voice, screenshots, and files. |
| Platforms | macOS, built native | Web, desktop, and mobile. Cross-platform by design. |
Beyond the table
In Capacities, capture starts with a classification. Is this a note, a person, a meeting, an idea? Which object type, which properties? For a considered entry that question is useful. For the fortieth save of the week it is a small tax, and small taxes change behavior: the interesting link stays in the tab, the screenshot stays on the desktop. In Mindly, capture is one keystroke. ⌘M takes whatever you have, a note, a link, a PDF, a screenshot, a voice memo, and files it as an item. The decision about what it is happens after the save, and not by you.
Capacities gives you a well-designed kit and lets you build: object types, properties, links between them, views over the result. The structure is exactly as good as the effort you put in, and for people who enjoy that work it can be very good. Mindly inverts the arrangement. AI tags each save, writes a summary, transcribes voice, runs OCR on screenshots, and links related items together automatically. You can adjust what it produces, but you never start from a blank model. The honest trade: Capacities gives you precision you designed, Mindly gives you organization you did not have to design.
Object-based systems retrieve well along the lines you drew: find every book, every meeting with this person. The catch is that you had to draw the lines first, and search inherits the gaps in your model. Mindly's search is semantic and works in plain language. You can ask for 'that article about sleep and memory' without remembering the title, the tag, or where you put it, and because AI transcribes voice memos and runs OCR on screenshots at capture, those become searchable too. You can also open any saved item and chat with it, asking questions grounded in that document.
Capacities is a cloud service. Your notes sync across web, desktop, and mobile, which is convenient, and they live on Capacities' servers, which is the part that gives some people pause. Mindly keeps your library in a folder on your Mac, and you can export it to standard formats whenever you want. AI processing does travel over encrypted channels to cloud models, and content is not retained after the request, so the trade is not zero, but the canonical copy of everything you have saved stays on hardware you own. No account is needed to use the app.
An object model is a garden. Types drift, properties go stale, and the elegant system from month one needs pruning by month twelve or it quietly stops reflecting how you think. Some people find that maintenance satisfying. Many discover they have stopped doing it and their studio has become a storage unit. Mindly has no model to maintain. Ten years of saves are just items with AI-generated tags and links, and the upkeep rounds to zero, because nothing depends on you keeping a schema current. If your notes should outlast your enthusiasm for organizing them, that matters.
Which one for you
Choose Mindly when
Choose Capacities when
Making the move
Capacities exports your content as Markdown, so moving is a matter of curation rather than conversion. You do not need to bring everything, and you do not need to do it in one sitting.
Common questions
For the right person, yes. If you enjoy modeling knowledge as typed objects and want that system on web, desktop, and mobile, Capacities is one of the most thoughtfully designed tools in the category. It is less worth it if you mainly want to save things quickly and find them later, because then the object model is overhead you pay on every capture.
Capacities is a cloud studio where you structure knowledge yourself: typed objects, properties, and links you define. Mindly is a Mac-native second brain where AI does that work: one shortcut captures notes, links, PDFs, screenshots, and voice, and each save is tagged, summarized, and connected automatically. Capacities rewards deliberate modeling. Mindly rewards saving things without thinking about structure at all.
Yes, manually. Capacities exports Markdown, and Mindly accepts files by ⌘M or drag and drop, so the path is export, bring in what matters, and let AI tag and link it. There is no automated Capacities importer in Mindly, so treat it as curation: most people move the notes they still use and leave the rest in Capacities as an archive.
Capacities is cloud-based. Your notes live on its servers and sync across web, desktop, and mobile, which is what makes cross-device access work. Mindly takes the opposite position: the library lives in a folder on your Mac and can be exported to standard formats. AI processing runs over encrypted channels, and content is not retained after the request.
No. Mindly is a native app for macOS 14 and later, and there is no web, Windows, or mobile version. If cross-platform access is a hard requirement, Capacities is a better fit. If your serious capture and thinking happen on a Mac, the trade buys a faster app and a library stored locally rather than in a cloud.
Mindly is free for your first 25 items, with no account needed, and Pro is €7.99 a month or €44.99 a year. Capacities has a free plan with paid tiers for AI and advanced features; check its site for current pricing. The practical difference is that you can try Mindly's full capture and AI flow on real notes before paying anything.
If this comparison resonates, try Mindly on your Mac. One shortcut for mixed saves, a library that lives on your device, and AI that organizes everything automatically.
Free to start. macOS 14.0+. No credit card required.