head to head · open source
Polar vs sossoldi
Polar has 10,454 GitHub stars, 811 forks, 141 open issues and last shipped yesterday. sossoldi has 1,414 stars, 216 forks, 37 open issues and last shipped 14 days ago. Polar leads on adoption by 639% (10,454 vs 1,414 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 | 2026-11-02 | 2026-10-20 |
| Forks | ⑂ 811 | ⑂ 216 |
| 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
Website • Docs • API Reference Polar: A billing platform for the intelligence era Turn usage into revenue. Polar is the financial layer for a new generation of intelligent software, built for AI startups that need to charge for tokens, agents, and compute without building billing infrastructure from scratch. Ship any pricing model in an afternoon. Usage billing, subscriptions, seats, credits, trials, and discounts. Compose them however your product charges. Meter what matters. Bill tokens, API calls, agent runs, GPU seconds, and storage with precision down to the event. Checkouts that convert , realtime metrics…
read the full Polar overview →
About sossoldi
Sossoldi Wealth management app Sossoldi (Wealth management app) Sossoldi is a free and open source wealth management / personal finance / Net Worth tracking app, made with Flutter. ❓ What problem we are solving & why Mr. Rip is a blogger that has a spreadsheet in which he tracks his net worth. Sossoldi is a Mobile + Desktop app that aims at replacing that spreadsheet and make it easier for everyone to track their net worth even if they are not as skilled with Google Sheets or Excel. The app is being developed using the Flutter framework which makes it possible to have one codebase for different platforms…
read the full sossoldi overview →
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Frequently asked questions
Is Polar or sossoldi more popular?
Polar has 10,454 GitHub stars and sossoldi has 1,414. 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 (10,454 stars) or its Apache-2.0 licence terms. Choose sossoldi if its feature set, stack or MIT licence fits better. Both are self-hostable.