← Back to home
Comparison · Collab

Contractbook vs Komga

A side-by-side editorial comparison of Contractbook and Komga — release velocity, themes, recent moves, and the top alternatives to consider.

Contractbook vs Komga: at a glance

FeatureContractbookKomga
SectorCollabCollab
Velocity score5.06.3
Sparks · 30d01
Top themescontract-automation, permissions, two-factor-auth, ai-extractionfrontend-rewrite, beta, self-hosted, ebook-formats
Last editorial update7d ago1d ago
WebsiteVisit →

What is Contractbook?

Contract automation grows up: admin permission maps, 2FA, and forms that do their own arithmetic.

Contractbook released a batch of six changes on a single day covering three areas at once. Administration gets a company-wide Spaces access page answering who can reach which space and with what permission, plus OTP two-factor authentication at login. Contract creation gets calculation fields in forms that compute totals and pro-rated amounts and insert them into the document automatically. The AI side gets a new extraction model and a dedicated place to manage AI upload contract types, with built-in defaults now editable per company.

Read the full Contractbook trajectory →

What is Komga?

After two years of quiet fixes, Komga puts a whole new web UI in front of users.

Komga's recent history is almost entirely maintenance — archive-format edge cases, EPUB table-of-contents parsing, Kobo and OPDS compatibility, and a long tail of dependency bumps and translations. Release 1.26.0 breaks that pattern by shipping NextUI, a rewritten web interface, in beta and served alongside the existing one from the same server. The old UI remains the default, and the new one is reached from a sidebar link or a /next path, with a published list of what is still missing.

Read the full Komga trajectory →

Contractbook vs Komga: editorial side-by-side

C5.0

Contract automation grows up: admin permission maps, 2FA, and forms that do their own arithmetic.

◆ Current state

Contractbook released a batch of six changes on a single day covering three areas at once. Administration gets a company-wide Spaces access page answering who can reach which space and with what permission, plus OTP two-factor authentication at login. Contract creation gets calculation fields in forms that compute totals and pro-rated amounts and insert them into the document automatically. The AI side gets a new extraction model and a dedicated place to manage AI upload contract types, with built-in defaults now editable per company.

◆ Where it's heading

The pattern is a product being fitted for larger customers: the access-visibility page is gated to Accelerate and Enterprise plans, group-level company permissions landed earlier in the year, and 2FA closes the obvious procurement objection. Meanwhile the AI features are moving from fixed behaviour toward configurable behaviour — extraction types are now a company's own list rather than the vendor's. Calculations remove the last common reason to edit a generated .docx by hand.

◆ Prediction

The admin thread points toward more permission surface — audit trails or per-space delegation would follow naturally from a page that already explains where each permission comes from. Nothing in these entries indicates how much extraction accuracy actually improved.

K
Komga
COLLAB
6.3

After two years of quiet fixes, Komga puts a whole new web UI in front of users.

◆ Current state

Komga's recent history is almost entirely maintenance — archive-format edge cases, EPUB table-of-contents parsing, Kobo and OPDS compatibility, and a long tail of dependency bumps and translations. Release 1.26.0 breaks that pattern by shipping NextUI, a rewritten web interface, in beta and served alongside the existing one from the same server. The old UI remains the default, and the new one is reached from a sidebar link or a /next path, with a published list of what is still missing.

◆ Where it's heading

This is a staged frontend replacement rather than a cutover: two UIs on one web server, a v2 referential API landing in the same release to back the new client, and a hotfix a few hours later for NextUI CSS layers under Tomcat. The backend is simplifying in parallel — RAR5 support moved to plain Java and libarchive was dropped from the Docker image and the tray app, removing a native dependency from the build. Feature work outside the UI stays narrow and format-focused.

◆ Prediction

Expect a run of point releases closing the gaps in NextUI's feature list and hardening the two-UI serving path, with the beta label staying on until parity is reached. A default switch is unlikely before the missing features land.

Alternatives to Contractbook 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 Contractbook or Komga.

See all Contractbook alternatives → · See all Komga alternatives →

Recent activity from Contractbook and Komga

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 2d agoKomgaKomga 1.26.0 ships NextUI, a rewritten web interface, in beta
  2. 2d agoKomgaRelease 1.26.1
  3. 9d agoContractbook🧮 Calculations in forms
  4. 9d agoContractbook🔑 OTP two-factor authentication
  5. 9d agoContractbook🖼️ AI upload: contract types
  6. 9d agoContractbook🗺️ Spaces access
  7. 9d agoContractbook🔎 Search results revamp
  8. 9d agoContractbook✨ AI extraction model upgrade
  9. 1mo agoKomgaRelease 1.25.0
  10. 3mo agoKomgaRelease 1.24.4
  11. 4mo agoKomgaRelease 1.24.3
  12. 4mo agoKomgaRelease 1.24.2

Frequently asked questions

What is the difference between Contractbook and Komga?

They serve adjacent needs but don't currently overlap on shipped themes. Komga 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 Contractbook better than Komga?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Komga 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 Contractbook?

Top Contractbook alternatives in Collab are ranked by recent ship velocity. Browse the "Contractbook alternatives" section above for the current picks, or visit /alternatives/contractbook 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.