head to head · open source
Invoice Ninja vs TimeTracker
Invoice Ninja has 10,580 GitHub stars, 2,805 forks, 945 open issues and last shipped 3 days ago. TimeTracker has 641 stars, 82 forks, 5 open issues and last shipped yesterday. Invoice Ninja leads on adoption by 1,551% (10,580 vs 641 stars). Invoice Ninja is written in PHP under a custom or non-standard licence; TimeTracker is written in Python under GPL-3.0. Invoice Ninja has attracted 27% as many forks as stars, TimeTracker 13%. TimeTracker was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| Invoice Ninja | TimeTracker | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 641 |
| License | Custom / other | GPL-3.0 |
| Written in | PHP | Python |
| Last push | 2026-11-10 | 2026-11-12 |
| Forks | ⑂ 2.8K | ⑂ 82 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Invoice Ninja if
- You weight community size — 11K stars and counting
- You want the Custom / other license terms
- Your stack matches PHP
- You value the larger contributor base for long-term maintenance
pick TimeTracker if
- You want the TimeTracker feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Python
- You evaluated both and TimeTracker fits your workflow better
About Invoice Ninja
Invoice Ninja 5 Invoice Ninja Version 5 is here! We've taken the best parts of version 4 and added the most requested features to create an invoicing application like no other. Check the Invoice Ninja YouTube Channel to get up to speed, or try the Demo now. Choose your setup Hosted: Our hosted version is a Software as a Service (SaaS) solution. You're up and running in under 5 minutes, with no need to worry about hosting or server infrastructure. Self Hosted: For those who prefer to manage their own hosting and server infrastructure. This version gives you full control and flexibility. All Pro and Enterprise…
read the full Invoice Ninja overview →
About TimeTracker
TimeTracker Self hosted time tracking, invoicing and Peppol e invoicing for freelancers and teams — with no per seat fees. Live demo · Website · Docs · Changelog Quick start (60 seconds) No git clone, no certificate warning — plain HTTP on port 8080 with bundled PostgreSQL: Latest release: v5.18.0 — see CHANGELOG.md. More install paths (HTTPS production, NAS UI paste, cloud): Install options. Why TimeTracker? Peppol & EN 16931 e invoicing — Send invoices yourself via the bundled Peppol Bridge; embed Factur X / ZUGFeRD XML in PDFs. No paid SaaS middleman for e invoicing. Self hosted — Your timers, clients, and…
read the full TimeTracker overview →
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Frequently asked questions
Is Invoice Ninja or TimeTracker more popular?
Invoice Ninja has 10,580 GitHub stars and TimeTracker has 641. Invoice Ninja has the larger community by that measure.
Are Invoice Ninja and TimeTracker free?
Both are open source. Invoice Ninja has no licence declared in this registry, and TimeTracker is licensed under GPL-3.0. Both are free to self-host.
What is the difference between Invoice Ninja and TimeTracker?
Invoice Ninja is written in PHP and TimeTracker in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Invoice Ninja or TimeTracker?
Choose Invoice Ninja if you want the larger community (10,580 stars) or its Custom / other licence terms. Choose TimeTracker if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.