head to head · open source
Polar vs invoicerr
Polar has 10,454 GitHub stars, 811 forks, 141 open issues and last shipped yesterday. invoicerr has 733 stars, 67 forks, 41 open issues and last shipped yesterday. Polar leads on adoption by 1,326% (10,454 vs 733 stars). Polar is written in Python under Apache-2.0; invoicerr is written in TypeScript under AGPL-3.0. Polar has attracted 8% as many forks as stars, invoicerr 9%. invoicerr was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (react), 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
| Polar | invoicerr | |
|---|---|---|
| GitHub stars | ★ 10K | ★ 733 |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 811 | ⑂ 67 |
| 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 invoicerr if
- You want the invoicerr 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 invoicerr 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 invoicerr
Invoicerr Invoicerr is a simple, open source invoicing application designed to help freelancers manage their quotes and invoices efficiently. It provides a clean interface for creating, sending, and tracking quotes and invoices — so you get paid faster, with less hassle. 📢 Maintainer availability I no longer have enough personal time to work on Invoicerr full time (studies + job). The project is still open, and I can continue to review and manage community pull requests, but development speed from my side will be slower. ✨ Features Create and manage invoices Create and manage quotes (convertible to invoices)…
read the full invoicerr overview →
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Frequently asked questions
Is Polar or invoicerr more popular?
Polar has 10,454 GitHub stars and invoicerr has 733. Polar has the larger community by that measure.
Are Polar and invoicerr free?
Both are open source. Polar is licensed under Apache-2.0 and invoicerr under AGPL-3.0. Neither carries a licence fee.
What is the difference between Polar and invoicerr?
Polar is written in Python and invoicerr 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, Polar or invoicerr?
Choose Polar if you want the larger community (10,454 stars) or its Apache-2.0 licence terms. Choose invoicerr if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.