
SpecialistShare and access study materials worldwide — with AI study tools built in
SpecialistShare and access study materials worldwide — with AI study tools built in
Capacities records 339,396 monthly visits with +5.7% month-over-month growth and Freemium, Paid pricing. SoBrief.com records 726,812 monthly visits with +12.2% growth and Freemium, Free Trial pricing.

A studio for your mind: object-based notes that stay connected
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | capacities.io | sobrief.com |
| Pricing Model | Freemium, Paid | Freemium, Free Trial |
| Monthly Visits | 339.4K (339,396) | 726.81K (726,812) |
| MoM Traffic Delta | +18.16K (+5.7%) | +79.11K (+12.2%) |
| Primary Market & Share | 🇺🇸 United States (29.5%) | 🇺🇸 United States (28.4%) |
| Direct Visits / mo | 249.6K | 150.12K |
| User Rating | 4.5 | 4.3 |
| Supported Platforms | Website | Website |

A studio for your mind: object-based notes that stay connected
Model people, books, projects and meetings as typed objects with their own properties, instead of forcing them into folders.
See every link to a note at a glance, and let Capacities surface unlinked mentions where you already wrote about the same thing.
Capture thoughts without deciding where they belong first, then link and refine them later.
On paid plans, an AI assistant works alongside your notes, and image, PDF and weblink analysis turns outside material into usable content.

Read more books, easier — key ideas from thousands of titles.
Each book is condensed into a short summary that captures its main ideas and takeaways, so you get the gist in minutes rather than hours.
Summaries come in multiple formats, including text, downloadable PDF and EPUB files, and audio, so you can read, save, or listen.
Browse by genre, author, trending, new, and themed lists, with dedicated Fiction and Nonfiction sections and a personally curated For You feed.
A personal library and import options let you save summaries, organise reading, and pick up where you left off across devices.

SpecialistShare and access study materials worldwide — with AI study tools built in
SpecialistShare and access study materials worldwide — with AI study tools built in
SpecialistAI flashcards that turn note dumps and PDFs into addictive quiz sessions
SpecialistAI flashcards that turn note dumps and PDFs into addictive quiz sessions

SpecialistAn AI agent that summarizes, transcribes, and turns your ideas into slides, docs, and media
SpecialistAn AI agent that summarizes, transcribes, and turns your ideas into slides, docs, and media
Offers professional audio and text book summaries, but lacks SoBrief's interactive AI chat features and fiction coverage.
Offers professional audio and text book summaries, but lacks SoBrief's interactive AI chat features and fiction coverage.

Provides much more comprehensive analytical book guides, but has fewer casual audio digests and shorter summaries.
Provides much more comprehensive analytical book guides, but has fewer casual audio digests and shorter summaries.
Delivers a cleaner document editing experience with beautiful typography, but lacks network graph views and typed object modeling.
Delivers a cleaner document editing experience with beautiful typography, but lacks network graph views and typed object modeling.

SpecialistConverts books into personalized audio lessons, but emphasizes microlearning over comprehensive chapter-by-chapter book summaries.
SpecialistConverts books into personalized audio lessons, but emphasizes microlearning over comprehensive chapter-by-chapter book summaries.
SpecialistOffline visual note-taking on an infinite canvas
SpecialistOffline visual note-taking on an infinite canvas

SpecialistADHD-friendly AI assistant for notes, email and tasks
SpecialistADHD-friendly AI assistant for notes, email and tasks

Offers superior visual whiteboarding and spatial structuring for complex research, but lacks Capacities' typed object database system.
Offers superior visual whiteboarding and spatial structuring for complex research, but lacks Capacities' typed object database system.

SpecialistYour files, notes and meetings in one drive — with an AI that knows all of it.
SpecialistYour files, notes and meetings in one drive — with an AI that knows all of it.
Automates note organization and retrieval via conversational AI, but lacks Capacities' manual typed object structure and calendar views.
Automates note organization and retrieval via conversational AI, but lacks Capacities' manual typed object structure and calendar views.