head to head · open source
Polar vs sossoldi
Polar has 10,270 GitHub stars, 787 forks, 141 open issues and last shipped yesterday. sossoldi has 1,395 stars, 214 forks, 37 open issues and last shipped 6 days ago. Polar leads on adoption by 636% (10,270 vs 1,395 stars). Polar is written in Python under Apache-2.0; sossoldi is written in Dart under MIT. Polar has attracted 8% as many forks as stars, sossoldi 15%. Polar 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
| Polar | sossoldi | |
|---|---|---|
| GitHub stars | ★ 10K | ★ 1.4K |
| License | Apache-2.0 | MIT |
| Written in | Python | Dart |
| Last push | 2026-09-17 | 2026-09-12 |
| Forks | ⑂ 787 | ⑂ 214 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Polar if
- You weight community size — 10K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick sossoldi if
- You want the sossoldi feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Dart
- You evaluated both and sossoldi fits your workflow better
About Polar
Polar is an open source billing platform and payment infrastructure project for digital products, SaaS applications, and AI workloads. It is written in Python, licensed under Apache 2.0, and built around FastAPI, Next.js, React, and Turborepo. The project positions itself as a financial layer for software that needs to charge for tokens, agents, compute, subscriptions, and usage based models.
read the full Polar overview →
About sossoldi
Sossoldi is a free and open source wealth management, personal finance, and net worth tracking app made with Flutter. It lives in the Dart and Flutter ecosystem, and its repository is licensed under MIT. The project targets mobile and desktop use from one codebase, covering Android, iOS, Windows, macOS, and Linux.
read the full sossoldi overview →
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Frequently asked questions
Is Polar or sossoldi more popular?
Polar has 10,270 GitHub stars and sossoldi has 1,395. Polar has the larger community by that measure.
Are Polar and sossoldi free?
Both are open source. Polar is licensed under Apache-2.0 and sossoldi under MIT. Neither carries a licence fee.
What is the difference between Polar and sossoldi?
Polar is written in Python and sossoldi in Dart. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Polar or sossoldi?
Choose Polar if you want the larger community (10,270 stars) or its Apache-2.0 licence terms. Choose sossoldi if its feature set, stack or MIT licence fits better. Both are self-hostable.