head to head · open source
SolidTime vs Kimai
SolidTime has 9,102 GitHub stars, 532 forks, 32 open issues and last shipped yesterday. Kimai has 5,129 stars, 878 forks, 350 open issues and last shipped yesterday. SolidTime leads on adoption by 77% (9,102 vs 5,129 stars). SolidTime is written in PHP under AGPL-3.0; Kimai is written in PHP under AGPL-3.0. SolidTime has attracted 6% as many forks as stars, Kimai 17%. Kimai was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (self-hosted, time-tracker, time-tracking, timetracker), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| SolidTime | Kimai | |
|---|---|---|
| GitHub stars | ★ 9.1K | ★ 5.1K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | PHP | PHP |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 532 | ⑂ 878 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SolidTime if
- You weight community size — 9.1K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches PHP
- You value the larger contributor base for long-term maintenance
pick Kimai if
- You want the Kimai feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches PHP
- You evaluated both and Kimai fits your workflow better
About SolidTime
solidtime The modern Open Source TimeTracker solidtime is a modern open source time tracking application for Freelancers and Agencies. Features Time tracking: Track your time with a modern and easy to use interface Projects: Create and manage projects and assign project members Tasks: Create and manage tasks and assign tasks to projects Clients: Create and manage clients and assign clients to projects Billable rates: Set billable rates for projects, project members, organization members and organizations Multiple organizations: Create and manage multiple organizations with one account Roles and permissions…
read the full SolidTime overview →
About Kimai
Kimai 1 Open Source Time Tracker Kimai is a professional grade time tracking application, free and open source. It handles use cases of freelancers as well as companies with dozens or hundreds of users. Kimai was build to track your project times and ships with many advanced features, including but not limited to: JSON API, invoicing, data exports, multi timer and punch in punch out mode, tagging, multi user multi timezones multi language (over 30 translations existing!), authentication via SAML/LDAP/Database, two factor authentication (2FA) with TOTP, customizable role and team permissions, responsive design…
read the full Kimai overview →
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Frequently asked questions
Is SolidTime or Kimai more popular?
SolidTime has 9,102 GitHub stars and Kimai has 5,129. SolidTime has the larger community by that measure.
Are SolidTime and Kimai free?
Both are open source. SolidTime is licensed under AGPL-3.0 and Kimai under AGPL-3.0. Neither carries a licence fee.
What is the difference between SolidTime and Kimai?
SolidTime is written in PHP and Kimai in PHP. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, SolidTime or Kimai?
Choose SolidTime if you want the larger community (9,102 stars) or its AGPL-3.0 licence terms. Choose Kimai if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.