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Comparison · Collab
Capacities vs Readwise
A side-by-side editorial comparison of Capacities and Readwise — release velocity, themes, recent moves, and the top alternatives to consider.
Capacities vs Readwise: at a glance
What is Capacities?
AI stopped being a bundled feature at Capacities and became the thing you buy more of
Capacities ships a numbered release every few weeks across its knowledge-base app — objects, tabs, the editor, presentation mode — with AI threaded through most of them. Recent releases added a choice of AI model provider, chat connectors, image analysis for Pro users, and in July a full public API. The newest release introduces Pro+ and Believer+, optional paid add-ons that raise the monthly AI budget and sell top-ups on top of it.
What is Readwise?
Two big swings in July and August, and since then Readwise has been paying the bill.
Readwise shipped a full mobile rewrite in late July and library-wide Ghostreader a fortnight later, and the weekly changelogs since have been almost entirely repair. The August 28 week is typical: thirteen fixes against five real improvements, spread across EPUB handling, chart and video embeds, Ghostreader chat on both mobile platforms, and Boox e-ink devices. The one consistent addition each week is parsing coverage for more publishers.
Capacities vs Readwise: editorial side-by-side
Capacities
3.8COLLAB
AI stopped being a bundled feature at Capacities and became the thing you buy more of
◆ Current state
Capacities ships a numbered release every few weeks across its knowledge-base app — objects, tabs, the editor, presentation mode — with AI threaded through most of them. Recent releases added a choice of AI model provider, chat connectors, image analysis for Pro users, and in July a full public API. The newest release introduces Pro+ and Believer+, optional paid add-ons that raise the monthly AI budget and sell top-ups on top of it.
◆ Where it's heading
Two arcs are converging. The first opened the product up: API 2.0 made the knowledge base programmable, and connectors let outside assistants reach it. The second is now closing around cost — AI has moved from a bundled capability to a budgeted one, and the new tiers charge for consumption rather than for features. Read together, Capacities is treating the knowledge base as the durable asset and inference as a metered resource priced separately from it.
◆ Prediction
Expect AI budget to become an explicit dimension of the plan comparison, with limits and top-up sizing tuned in follow-up releases. The entries do not show how the budget is measured, so the unit being sold remains unclear.
Readwise
6.3COLLAB
Two big swings in July and August, and since then Readwise has been paying the bill.
◆ Current state
Readwise shipped a full mobile rewrite in late July and library-wide Ghostreader a fortnight later, and the weekly changelogs since have been almost entirely repair. The August 28 week is typical: thirteen fixes against five real improvements, spread across EPUB handling, chart and video embeds, Ghostreader chat on both mobile platforms, and Boox e-ink devices. The one consistent addition each week is parsing coverage for more publishers.
◆ Where it's heading
The fix list is a map of where the rewrite is still settling — pagination and layout stability on Android tablets, chat sheets and message sending on mobile, exports arriving with page CSS attached. Underneath that, small capabilities keep arriving quietly: Apple Books folder-EPUBs now upload, interactive charts render as linked images instead of an import notice, non-Latin titles survive the trip to Kindle. The company is broadening what it can ingest and export while stabilising what it rebuilt.
◆ Prediction
Expect the weekly cadence to hold with fixes still outnumbering additions, and the remaining Boox and Android tablet issues to keep appearing until the mobile rewrite fully settles.
Alternatives to Capacities and Readwise
Other Collab products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Capacities or Readwise.
Hive
Hive is building the plumbing its Buzz AI snippets need to run on real team data
Mattermost
Mattermost is selling sovereignty and air-gapped AI, with releases buried in the argument
Paperless-ngx
Paperless-ngx is patching hard behind a 3.1 release that made AI a workflow step
Read the Docs
Read the Docs ships a dated release every week, and this one is documentation and dependencies
Zoho Sign
Zoho Sign is clearing the exit path off Docusign while stacking up regional legal assurance
See all Capacities alternatives → · See all Readwise alternatives →
Recent activity from Capacities and Readwise
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 5d agoReadwiseApple Books EPUBs, chart embeds, and non-Latin Kindle titles
- 12d agoReadwiseAuto-scroll preference persists and Kindle disconnect works properly
- 16d agoCapacitiesCapacities Pro+ and Believer+ ⚡
- 19d agoReadwiseFaster manual highlight entry and steadier highlight scanning
- 26d agoReadwiseGlobal Ghostreader reads and acts across your whole library ⚡
- 1mo agoReadwiseMastery cards, Discards, and multilingual scanning restored on mobile
- 1mo agoReadwiseReadwise 2.0 rebuilds the mobile apps from scratch ⚡
- 1mo agoCapacitiesReliability polish across dates, tabs, editor, and presentation mode
- 1mo agoCapacitiesCapacities API 2.0, Weblink Analysis, and Presentation Mode ⚡
- 2mo agoCapacitiesAI Chat Connectors 2.0 + Many improvements
- 3mo agoCapacitiesBulk Import for Everyone, Image Analysis for Pro, and Continuous Improvements
- 4mo agoCapacitiesRecurring Tasks and Choose Your Capacities AI Model Provider
Frequently asked questions
What is the difference between Capacities and Readwise?
They serve adjacent needs but don't currently overlap on shipped themes. Readwise is currently shipping more aggressively (velocity 6.3 vs 3.8), with 1 editorial sparks in the last 30 days against 1. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Capacities better than Readwise?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Readwise is currently shipping more aggressively (velocity 6.3 vs 3.8), with 1 editorial sparks in the last 30 days against 1. For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.
What are the best alternatives to Capacities?
Top Capacities alternatives in Collab are ranked by recent ship velocity. Browse the "Capacities alternatives" section above for the current picks, or visit /alternatives/capacities for the full list with editorial commentary on each.
What are the best alternatives to Readwise?
Top Readwise alternatives in Collab are ranked by recent ship velocity. Browse the "Readwise alternatives" section above for the current picks, or visit /alternatives/readwise for the full list with editorial commentary on each.