AFFiNE
A nightly canary train where the AI platform work hides between dependency bumps
Comparison · Collab
Double vs Komga
A side-by-side editorial comparison of Double and Komga — release velocity, themes, recent moves, and the top alternatives to consider.
Double vs Komga: at a glance
What is Double?
Double is turning its accounting assistant into the way the work gets done
Double ships weekly, and nearly every release extends Ask Double rather than the surrounding application. In the last two months it has learned to build workpapers by reconciling accounts against supporting documents, import accruals, create and manage client metrics through the MCP and API, take voice input, and — in private beta — reach into Slack, Notion, and HubSpot. The non-assistant work fills in what firms need to trust that: role-based restrictions on editing client properties, and check transactions in AI Transactions.
What is Komga?
Komga is rewriting its web UI in the open, shipping the beta alongside the old one.
Komga's release cadence is dominated by NextUI, a ground-up rewrite of the web interface that landed in beta with 1.26.0 and is served next to the existing UI at /next rather than replacing it. The three patch releases that followed within 48 hours were almost entirely NextUI shakedown work — scroll restoration, selection behavior, stylesheets failing to load under Tomcat. Underneath the interface work the server keeps widening format support, with rar5 handling in plain Java and solid rar4 archives earlier in the summer.
Double vs Komga: editorial side-by-side
Double
6.3COLLAB
Double is turning its accounting assistant into the way the work gets done
◆ Current state
Double ships weekly, and nearly every release extends Ask Double rather than the surrounding application. In the last two months it has learned to build workpapers by reconciling accounts against supporting documents, import accruals, create and manage client metrics through the MCP and API, take voice input, and — in private beta — reach into Slack, Notion, and HubSpot. The non-assistant work fills in what firms need to trust that: role-based restrictions on editing client properties, and check transactions in AI Transactions.
◆ Where it's heading
The assistant is moving from answering questions to performing the billable work — tie-out, accrual setup, metric standardization across a whole book of clients. Each release pairs that with an access or permissions control, which is the pattern of a vendor that knows the objection is liability rather than capability. The accounting engine itself keeps advancing underneath, most recently with prepaid contracts paid in installments.
◆ Prediction
Given the review-and-signoff question these features raise, the likely next step is an approval or audit trail around what Ask Double produces rather than another task it can perform.
Komga
6.3COLLAB
Komga is rewriting its web UI in the open, shipping the beta alongside the old one.
◆ Current state
Komga's release cadence is dominated by NextUI, a ground-up rewrite of the web interface that landed in beta with 1.26.0 and is served next to the existing UI at /next rather than replacing it. The three patch releases that followed within 48 hours were almost entirely NextUI shakedown work — scroll restoration, selection behavior, stylesheets failing to load under Tomcat. Underneath the interface work the server keeps widening format support, with rar5 handling in plain Java and solid rar4 archives earlier in the summer.
◆ Where it's heading
The project is running a long, deliberately cautious frontend migration: both UIs ship in the same binary, the feature gap is tracked publicly in an issue, and users opt in by URL. That arrangement should persist across several minor versions before the old WebUI is retired. The parallel v2 referential API suggests the rewrite is also being used to revise the server contract rather than only restyle the client.
◆ Prediction
Near-term releases should keep closing the NextUI feature gap issue by issue, with patch releases landing within days of each other. The old WebUI is unlikely to be removed before NextUI reaches parity and browser refresh stops falling back to it.
Alternatives to Double and Komga
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 Double or Komga.
pagedown
pagedown is down to one small fix a year, mostly absorbing changes from elsewhere.
tufte
After three quiet years, tufte 0.15 finally lets Tufte-style documents cross-reference.
xaringan
xaringan has settled into theme upkeep and Pandoc-era compatibility patches.
litedown
litedown grows from a lean renderer into a book and site generator
bookdown
bookdown's output is mature; its free hosting destination is being switched off.
See all Double alternatives → · See all Komga alternatives →
Recent activity from Double and Komga
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 8h agoDoubleAccruals handles prepaid contracts paid in installments
- 1d agoKomgaTranslation updates and a release tooling fix
- 1d agoKomgaNextUI beta fixes: scroll, selection, and loading states
- 3d agoKomgaNextUI beta: a parallel rewrite of the Komga web interface ⚡
- 3d agoKomgaFix missing NextUI stylesheets when served from Tomcat
- 7d agoDoubleRole-based restrictions on editing client properties
- 14d agoDoubleAsk Double reaches Slack, Notion and CRM data in private beta ⚡
- 21d agoDoubleVoice input for Ask Double
- 28d agoDoubleCreate and manage client metrics via Ask Double and MCP
- 1mo agoDoubleAsk Double builds workpapers by reconciling accounts to documents ⚡
- 1mo agoKomgaSolid RAR4 archive support
- 3mo agoKomgaFixes for EPUB parsing, Kobo, KOReader, and OPDS2
Frequently asked questions
What is the difference between Double and Komga?
They serve adjacent needs but don't currently overlap on shipped themes. Double and Komga are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Double better than Komga?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Double and Komga are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.
What are the best alternatives to Double?
Top Double alternatives in Collab are ranked by recent ship velocity. Browse the "Double alternatives" section above for the current picks, or visit /alternatives/double for the full list with editorial commentary on each.
What are the best alternatives to Komga?
Top Komga alternatives in Collab are ranked by recent ship velocity. Browse the "Komga alternatives" section above for the current picks, or visit /alternatives/komga for the full list with editorial commentary on each.