Hive
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Comparison · Collab
Komga vs SOGo
A side-by-side editorial comparison of Komga and SOGo — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
Komga vs SOGo: at a glance
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.
What is SOGo?
SOGo's release notes have become a vulnerability disclosure channel with a version number attached.
SOGo is a self-hosted groupware suite — webmail, calendaring and contacts — maintained by Alinto. Four of the last six releases exist primarily to fix security vulnerabilities: XSS through malicious mail, SQL injection, OpenID impersonation, script execution via theme and hint query parameters. The newest, 5.12.10, fixes four more and states that all previous versions are affected, with CVE identifiers still pending at publication.
Komga vs SOGo: editorial side-by-side
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.
SOGo
2.5COLLAB
SOGo's release notes have become a vulnerability disclosure channel with a version number attached.
◆ Current state
SOGo is a self-hosted groupware suite — webmail, calendaring and contacts — maintained by Alinto. Four of the last six releases exist primarily to fix security vulnerabilities: XSS through malicious mail, SQL injection, OpenID impersonation, script execution via theme and hint query parameters. The newest, 5.12.10, fixes four more and states that all previous versions are affected, with CVE identifiers still pending at publication.
◆ Where it's heading
The pattern is a codebase whose input-handling surface is being systematically probed, largely by the community reporting to the project's bug address, and patched in batches. Release numbering has stopped being reliable as a timeline — 5.12.7 shipped after 5.12.8 — so version order tells you nothing about what a deployment contains. The two non-security releases in this window were both regression repairs from the security releases that preceded them, which is the cost of shipping fixes at this cadence.
◆ Prediction
Given four security batches in five months and CVE identifiers still being assigned retroactively, another batch on the same cadence is the most likely next release, with a regression patch following it.
Alternatives to Komga and SOGo
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 Komga or SOGo.
GitHub
GitHub is standardising the agent layer it doesn't own, while the model roster churns underneath.
Staffbase
Staffbase's public feed is employer branding, not product — the release signal isn't here.
AFFiNE
A nightly canary train where the AI platform work hides between dependency bumps
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.
Recent activity from Komga and SOGo
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoSOGoFour more vulnerabilities patched; all prior versions affected
- 2d agoKomgaTranslation updates and a release tooling fix
- 2d agoKomgaNextUI beta fixes: scroll, selection, and loading states
- 4d agoKomgaNextUI beta: a parallel rewrite of the Komga web interface ⚡
- 4d agoKomgaFix missing NextUI stylesheets when served from Tomcat
- 1mo agoKomgaSolid RAR4 archive support
- 2mo agoSOGoPatch undoes 5.12.8 regressions in preferences and mail display
- 2mo agoSOGoTwo CVEs fixed for PostgreSQL user sources
- 3mo agoSOGoFour vulnerabilities: XSS, SQL injection, OpenID impersonation
- 3mo agoKomgaFixes for EPUB parsing, Kobo, KOReader, and OPDS2
- 4mo agoSOGoTOTP silently disabled for new users, now fixed
- 5mo agoSOGoInjection fixes in hint queries, theme queries and categories
Frequently asked questions
What is the difference between Komga and SOGo?
Both compete on the same themes — self-hosted — within Collab. Komga is currently shipping more aggressively (velocity 6.3 vs 2.5), 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 Komga better than SOGo?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Komga is currently shipping more aggressively (velocity 6.3 vs 2.5), 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 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.
What are the best alternatives to SOGo?
Top SOGo alternatives in Collab are ranked by recent ship velocity. Browse the "SOGo alternatives" section above for the current picks, or visit /alternatives/sogo for the full list with editorial commentary on each.