Capacities
Capacities ships API 2.0, pivoting from self-contained PKM toward a connected AI memory layer
Comparison · Collab
Guru vs Readwise
A side-by-side editorial comparison of Guru and Readwise — release velocity, themes, recent moves, and the top alternatives to consider.
Guru vs Readwise: at a glance
What is Guru?
Guru is tightening the leash on the Knowledge Agent it just handed the keys to.
Everything recent is the Knowledge Agent. It already writes to the knowledge base — creating collections, bulk-archiving cards, running drafts through to publish — and the newest work narrows where and how it acts: per-channel behaviour in Slack, and skills pinned to a named document instead of searching for one. Around that sit guardrails, skill permissions, recoverable drafts and scheduled automations.
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.
Guru vs Readwise: editorial side-by-side
Guru
5.0COLLAB
Guru is tightening the leash on the Knowledge Agent it just handed the keys to.
◆ Current state
Everything recent is the Knowledge Agent. It already writes to the knowledge base — creating collections, bulk-archiving cards, running drafts through to publish — and the newest work narrows where and how it acts: per-channel behaviour in Slack, and skills pinned to a named document instead of searching for one. Around that sit guardrails, skill permissions, recoverable drafts and scheduled automations.
◆ Where it's heading
The arc is autonomy first, then control. Having given the agent write access and a schedule, Guru is now spending releases on determinism and scoping — making the agent's behaviour predictable per channel and its grounding exact per skill. That is the work required before customers let an agent run unsupervised on a knowledge base, and it suggests trust, not answer quality, is the constraint being engineered against.
◆ Prediction
The scoping controls point toward auditability as the next gap: some record of what the agent did to the knowledge base, and per-skill or per-channel review of those actions, to match the permissions and guardrails already shipped.
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 Guru 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 Guru or Readwise.
SiYuan
SiYuan v3.8.2 brings mobile marketplace, editor customization, and remote kernel support
Kavita
Kavita overhauls its Kavita+ premium tier and integrates Hardcover for book recommendations, its most significant monetization move in three years.
Teable
Teable agents now deduplicate artifacts and webhooks gain synchronous response support for platform verification flows.
GitHub
Copilot earns PR approval authority — the agentic developer workflow is no longer hypothetical.
Slack
Slack raises the Marketplace bar back to ten installs while the agent platform consolidates.
See all Guru alternatives → · See all Readwise alternatives →
Recent activity from Guru and Readwise
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 6d agoReadwiseApple Books EPUBs, chart embeds, and non-Latin Kindle titles
- 13d agoReadwiseAuto-scroll preference persists and Kindle disconnect works properly
- 14d agoGuruTune how your Slack agent joins the conversation, channel by channel
- 14d agoGuruGround a skill in the exact document it should use, every time
- 20d agoReadwiseFaster manual highlight entry and steadier highlight scanning
- 27d 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 agoGuruHand your knowledge base upkeep to your Knowledge Agent ⚡
- 1mo agoGuruNever lose a draft to employee turnover again
- 1mo agoGuruOperator Mode
- 2mo agoGuruMicrosoft Work IQ
Frequently asked questions
What is the difference between Guru and Readwise?
They serve adjacent needs but don't currently overlap on shipped themes. Readwise is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Guru 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 5.0), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.
What are the best alternatives to Guru?
Top Guru alternatives in Collab are ranked by recent ship velocity. Browse the "Guru alternatives" section above for the current picks, or visit /alternatives/guru 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.