Ever Gauzy
Ever Gauzy adds full payroll and leave management modules in a single sprint
Comparison · HR
OpenCATS vs TimeTagger
A side-by-side editorial comparison of OpenCATS and TimeTagger — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:open-source
OpenCATS vs TimeTagger: at a glance
What is OpenCATS?
OpenCATS ships PHP 8.4/8.5 compatibility, utf8mb4 migration, and country support in its most significant release in years.
OpenCATS delivered two major releases in quick succession: v0.11.0 brought the long-deferred PHP 8 compatibility overhaul, utf8mb4 database migration, full country support across candidates/contacts/companies/job orders, CAPTCHA for career portal applications, and the replacement of the old Google ZIP lookup with OpenStreetMap Nominatim. v0.11.1 followed with a focused security hardening pass — SQL input validation, CSV import field mapping, mass-import file handling — plus Career Portal fixes and expanded contributor documentation.
What is TimeTagger?
A time tracker that ships twice a year and spends it on self-hosters.
TimeTagger is a self-hosted time tracker maintained by a small core with a steady stream of outside contributions. Releases land two or three times a year and bundle whatever community PRs arrived rather than a planned roadmap. Recent work concentrates on the deployment and integration surface — an API for external tooling, a hardened default binding, offline usage — rather than the tracking UI itself.
OpenCATS vs TimeTagger: editorial side-by-side
OpenCATS
6.3HR
OpenCATS ships PHP 8.4/8.5 compatibility, utf8mb4 migration, and country support in its most significant release in years.
◆ Current state
OpenCATS delivered two major releases in quick succession: v0.11.0 brought the long-deferred PHP 8 compatibility overhaul, utf8mb4 database migration, full country support across candidates/contacts/companies/job orders, CAPTCHA for career portal applications, and the replacement of the old Google ZIP lookup with OpenStreetMap Nominatim. v0.11.1 followed with a focused security hardening pass — SQL input validation, CSV import field mapping, mass-import file handling — plus Career Portal fixes and expanded contributor documentation.
◆ Where it's heading
OpenCATS is undergoing a systematic modernization of its technical foundation: InnoDB migration (v0.10.0), PHP 8 + utf8mb4 (v0.11.0), security hardening (v0.11.1). The project is not adding net-new capability so much as making what exists maintainable and secure enough to run in modern environments. The expanded contributing documentation and automated legacy database testing signal that maintainers are investing in the contributor pipeline.
◆ Prediction
After the modernization sprint, the next likely move is a modern email/rich text editor replacement (CKEditor 4 was pinned at the final open-source release as a placeholder) and further security audit work on endpoints that haven't been touched since the v0.9 era.
A time tracker that ships twice a year and spends it on self-hosters.
◆ Current state
TimeTagger is a self-hosted time tracker maintained by a small core with a steady stream of outside contributions. Releases land two or three times a year and bundle whatever community PRs arrived rather than a planned roadmap. Recent work concentrates on the deployment and integration surface — an API for external tooling, a hardened default binding, offline usage — rather than the tracking UI itself.
◆ Where it's heading
The center of gravity has moved from the timeline UI toward how an instance is run and scripted against. v25.12.1 added a version endpoint and server-side record filters, which are the pieces an operator needs to automate against a deployment; v24.12.2 moved the default bind to loopback after an auth gap. The app-facing changes in the same window are smaller and mostly contributed.
◆ Prediction
The next release will most likely extend the records API further, since that is where the last cycle of contributions concentrated. The two-releases-a-year cadence gives no basis for predicting when.
Alternatives to OpenCATS and TimeTagger
Other HR 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 OpenCATS or TimeTagger.
Lever
Lever leans into AI recruiting features while its changelog reads more like a blog feed than a release log.
Gem
Gem's public changelog is documentation articles, not product releases—its actual development velocity is not visible from these entries.
Envoy
Envoy moves ID verification in-house with proprietary AI, breaking from third-party scanning vendors.
Workyard
Workyard builds an AI-powered operations layer for construction crews: Time Assistant, geofence-triggered forms, and Shortcuts
Tanda
Tanda consolidates compliance and integrations with a high-frequency release cadence targeting AU and UK payroll markets
See all OpenCATS alternatives → · See all TimeTagger alternatives →
Recent activity from OpenCATS and TimeTagger
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 11d agoOpenCATSOpenCATS v0.11.1
- 18d agoOpenCATSOpenCATS v0.11.0 ⚡
- 2mo agoOpenCATSOpenCATS v0.10.0 ⚡
- 9mo agoTimeTaggerRecords API gains server-side filters and a version endpoint
- 1y agoTimeTaggerPassword-manager login, DST fixes, and a non-root image
- 1y agoTimeTaggerDefault bind moves to loopback after auth check gap
- 1y agoTimeTaggerNight-shift offsets and denser timeline clustering
- 2y agoTimeTaggerAndroid standalone display, multiple date formats, dark-mode fixes
- 2y agoOpenCATSv 0.9.7.4 Bugfixes and Security fixes
- 2y agoOpenCATS0.9.7.3: RussH patch cookies (#641)
- 2y agoOpenCATSSecurity release v0.9.7.2
- 2y agoTimeTaggerTotals now respect tag filters
Frequently asked questions
What is the difference between OpenCATS and TimeTagger?
Both compete on the same themes — open-source — within HR. OpenCATS is currently shipping more aggressively (velocity 6.3 vs 0.0), 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 OpenCATS better than TimeTagger?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. OpenCATS is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other HR products to evaluate alongside.
What are the best alternatives to OpenCATS?
Top OpenCATS alternatives in HR are ranked by recent ship velocity. Browse the "OpenCATS alternatives" section above for the current picks, or visit /alternatives/opencats for the full list with editorial commentary on each.
What are the best alternatives to TimeTagger?
Top TimeTagger alternatives in HR are ranked by recent ship velocity. Browse the "TimeTagger alternatives" section above for the current picks, or visit /alternatives/timetagger for the full list with editorial commentary on each.