Ever Gauzy
Ever Gauzy patches registration UX and table polish while a full payroll module lands beneath the release noise.
Comparison · HR
OpenCATS vs Kombo
A side-by-side editorial comparison of OpenCATS and Kombo — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:ats
OpenCATS vs Kombo: 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 Kombo?
Kombo expands its unified HR API into Payroll data models, opening a new data category for integration builders.
Kombo is a unified HR integration API shipping on a weekly changelog cadence, covering ATS, HRIS, LMS, and — as of August 30 — Payroll data models. Recent releases have a dual rhythm: graduating integrations from beta to General Availability in bulk while simultaneously adding new ones (Atlas, Skello, Zellis, Talent360). Integration depth is also growing, with Workday performance overhauls, Lever high-performance sync modes, and Greenhouse scorecard sync all landing in August.
OpenCATS vs Kombo: 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.
Kombo
7.5HR
Kombo expands its unified HR API into Payroll data models, opening a new data category for integration builders.
◆ Current state
Kombo is a unified HR integration API shipping on a weekly changelog cadence, covering ATS, HRIS, LMS, and — as of August 30 — Payroll data models. Recent releases have a dual rhythm: graduating integrations from beta to General Availability in bulk while simultaneously adding new ones (Atlas, Skello, Zellis, Talent360). Integration depth is also growing, with Workday performance overhauls, Lever high-performance sync modes, and Greenhouse scorecard sync all landing in August.
◆ Where it's heading
The product is expanding its data model surface area (Payroll is the newest) while tightening the reliability of existing connections. AI-assisted formula generation for custom field mapping reduces the configuration burden for complex data transformations. The trajectory is toward a comprehensive HR data fabric that covers the full employment data stack rather than just ATS/HRIS connectors.
◆ Prediction
Payroll data model launch typically precedes specific payroll integrations — expect Gusto, ADP, or Paychex connectors in the next 30-60 days. Advanced Mappings AI assistance will likely expand to more formula types and field contexts as adoption grows.
Alternatives to OpenCATS and Kombo
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 Kombo.
HavaHR
HavaHR ships a one-step MCP install, putting Malaysia payroll data inside any AI agent.
TriNet
TriNet is automating HR data flows with steady integration additions — Salesforce, Voya, and Slack — reducing manual updates for SMB customers.
Ashby
Ashby adds native WhatsApp messaging as its recruiting communication stack goes omnichannel.
Tanda
Tanda ships a dense cluster of payroll accuracy and reporting improvements aimed at Australian compliance depth.
Teamtailor
Teamtailor's Co-pilot is quietly automating the full recruiting pipeline, one trigger at a time.
See all OpenCATS alternatives → · See all Kombo alternatives →
Recent activity from OpenCATS and Kombo
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 9d agoKomboATS API Updates - September 6, 2026
- 9d agoKomboHRIS API Updates - September 6, 2026
- 9d agoKomboAssessment API Updates - September 6, 2026
- 12d agoOpenCATSOpenCATS v0.11.1
- 16d agoKomboKombo launches Payroll data models, adds Skello and Zellis integrations ⚡
- 16d agoKomboATS API Updates - August 30, 2026
- 16d agoKomboPlatform: AI formula assist, Candidate Sync page, webhook performance
- 19d agoOpenCATSOpenCATS v0.11.0 ⚡
- 2mo agoOpenCATSOpenCATS v0.10.0 ⚡
- 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
Frequently asked questions
What is the difference between OpenCATS and Kombo?
Both compete on the same themes — ats — within HR. Kombo is currently shipping more aggressively (velocity 7.5 vs 6.3), with 1 editorial sparks in the last 30 days against 1. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is OpenCATS better than Kombo?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Kombo is currently shipping more aggressively (velocity 7.5 vs 6.3), with 1 editorial sparks in the last 30 days against 1. 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 Kombo?
Top Kombo alternatives in HR are ranked by recent ship velocity. Browse the "Kombo alternatives" section above for the current picks, or visit /alternatives/kombo for the full list with editorial commentary on each.