head to head · open source
Firefly III vs Monetr
Firefly III has 25,061 GitHub stars, 2,361 forks, 169 open issues and last shipped yesterday. Monetr has 690 stars, 47 forks, 88 open issues and last shipped yesterday. Firefly III leads on adoption by 3,532% (25,061 vs 690 stars). Firefly III is written in PHP under AGPL-3.0; Monetr is written in Go under a custom or non-standard licence. Firefly III has attracted 9% as many forks as stars, Monetr 7%. Monetr 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
| Firefly III | Monetr | |
|---|---|---|
| GitHub stars | ★ 25K | ★ 690 |
| License | AGPL-3.0 | Custom / other |
| Written in | PHP | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 2.4K | ⑂ 47 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Firefly III if
- You weight community size — 25K 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 Monetr if
- You want the Monetr feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Go
- You evaluated both and Monetr fits your workflow better
About Firefly III
[![Packagist][packagist shield]][packagist url] [![License][license shield]][license url] [![Stargazers][stars shield]][stars url] [![Donate][donate shield]][donate url] Firefly III A free and open source personal finance manager Explore the documentation View the demo · Report a bug · Request a feature · Ask questions Billionaires and fascists are breaking democracies and international alliances. Their profits are costing us our safety. (Digital) sovereignty is more important than ever. Firefly III is free open source software and originates from, and lives in the European Union (🇳🇱). Support your local…
read the full Firefly III overview →
About Monetr
monetr monetr is a budgeting application that aims to make it easier for people to budget around recurring expenses. While making it absolutely clear how much you have left over to budget or use for other unplanned spending. It is based off of the now defunct Simple. It is also completely free to self host. Contributing In order to run monetr locally you will need sandbox credentials for Plaid, you can obtain your own credentials here: Plaid Sign Up. Once you have a Client ID and a Client Secret you can run the following command in the monetr project directory to start a local environment. To start working on…
read the full Monetr overview →
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Frequently asked questions
Is Firefly III or Monetr more popular?
Firefly III has 25,061 GitHub stars and Monetr has 690. Firefly III has the larger community by that measure.
Are Firefly III and Monetr free?
Both are open source. Firefly III is licensed under AGPL-3.0, and Monetr has no licence declared in this registry. Both are free to self-host.
What is the difference between Firefly III and Monetr?
Firefly III is written in PHP and Monetr in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Firefly III or Monetr?
Choose Firefly III if you want the larger community (25,061 stars) or its AGPL-3.0 licence terms. Choose Monetr if its feature set, stack or Custom / other licence fits better. Both are self-hostable.