head to head · open source
rembg vs pymatting
rembg has 25,019 GitHub stars, 2,434 forks, 3 open issues and last shipped yesterday. pymatting has 1,921 stars, 227 forks, 11 open issues and last shipped 1 months ago. rembg leads on adoption by 1,202% (25,019 vs 1,921 stars). rembg is written in Python under MIT; pymatting is written in Python under MIT. rembg has attracted 10% as many forks as stars, pymatting 12%. rembg was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (image-processing), 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
| rembg | pymatting | |
|---|---|---|
| GitHub stars | ★ 25K | ★ 1.9K |
| License | MIT | MIT |
| Written in | Python | Python |
| Last push | 2026-10-10 | 2026-09-08 |
| Forks | ⑂ 2.4K | ⑂ 227 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick rembg if
- You weight community size — 25K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick pymatting if
- You want the pymatting feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and pymatting fits your workflow better
About rembg
Rembg is an MIT licensed Python tool for removing image backgrounds, usable as a CLI, a Python library, an HTTP server, or a Docker container, and aimed at developers, designers, and automated image pipelines that need background removal without depending on a hosted service.
read the full rembg overview →
About pymatting
PyMatting is a Python library for alpha matting that lets developers and researchers estimate a foreground object's alpha channel from an image and a hand drawn trimap.
read the full pymatting overview →
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Frequently asked questions
Is rembg or pymatting more popular?
rembg has 25,019 GitHub stars and pymatting has 1,921. rembg has the larger community by that measure.
Are rembg and pymatting free?
Both are open source. rembg is licensed under MIT and pymatting under MIT. Neither carries a licence fee.
What is the difference between rembg and pymatting?
rembg is written in Python and pymatting 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, rembg or pymatting?
Choose rembg if you want the larger community (25,019 stars) or its MIT licence terms. Choose pymatting if its feature set, stack or MIT licence fits better. Both are self-hostable.