head to head · open source
SolidTime vs Ziit
SolidTime has 8,923 GitHub stars, 507 forks, 32 open issues and last shipped yesterday. Ziit has 254 stars, 12 forks, 11 open issues and last shipped 27 days ago. SolidTime leads on adoption by 3,413% (8,923 vs 254 stars). SolidTime is written in PHP under AGPL-3.0; Ziit is written in TypeScript under AGPL-3.0. SolidTime has attracted 6% as many forks as stars, Ziit 5%. SolidTime was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (self-hosted, time-tracker, time-tracking), 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 | Ziit | |
|---|---|---|
| GitHub stars | ★ 8.9K | ★ 254 |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | PHP | TypeScript |
| Last push | 2026-09-17 | 2026-08-22 |
| Forks | ⑂ 507 | ⑂ 12 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SolidTime if
- You weight community size — 8.9K 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 Ziit if
- You want the Ziit feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and Ziit fits your workflow better
About SolidTime
SolidTime is a modern open source time tracking application built for freelancers and agencies. It is written in PHP on the Laravel framework, with a Vue front end, and it lives in the Laravel and Vue ecosystems that its topic list names. The project is licensed under the GNU Affero General Public License v3.0 and is developed in the solidtime io/solidtime repository. It ships with 8,923 stars, 508 forks, and 32 open issues at the time of writing, and it presents itself as a self hosted alternative with an optional hosted service.
read the full SolidTime overview →
About Ziit
Ziit is an open source, self hostable code time tracker written in TypeScript and released under the AGPL 3.0 license. It lives in the developer productivity ecosystem as a drop in alternative to WakaTime, and its own documentation describes it as "the Swiss army knife of code time tracking." A hosted instance is offered at ziit.app, but the project is designed so that a developer or a team can run the whole service on their own infrastructure instead, keeping coding data on a server they control. The dashboard is deliberately minimal and is inspired by Plausible Analytics, which is to say it favors a small numbe…
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Frequently asked questions
Is SolidTime or Ziit more popular?
SolidTime has 8,923 GitHub stars and Ziit has 254. SolidTime has the larger community by that measure.
Are SolidTime and Ziit free?
Both are open source. SolidTime is licensed under AGPL-3.0 and Ziit under AGPL-3.0. Neither carries a licence fee.
What is the difference between SolidTime and Ziit?
SolidTime is written in PHP and Ziit in TypeScript. 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 Ziit?
Choose SolidTime if you want the larger community (8,923 stars) or its AGPL-3.0 licence terms. Choose Ziit if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.