head to head · open source
rembg vs OpenImageIO
rembg has 24,991 GitHub stars, 2,430 forks, 3 open issues and last shipped 18 days ago. OpenImageIO has 2,378 stars, 707 forks, 143 open issues and last shipped yesterday. rembg leads on adoption by 951% (24,991 vs 2,378 stars). rembg is written in Python under MIT; OpenImageIO is written in C++ under Apache-2.0. rembg has attracted 10% as many forks as stars, OpenImageIO 30%. OpenImageIO 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 | OpenImageIO | |
|---|---|---|
| GitHub stars | ★ 25K | ★ 2.4K |
| License | MIT | Apache-2.0 |
| Written in | Python | C++ |
| Last push | 2026-09-20 | 2026-10-07 |
| Forks | ⑂ 2.4K | ⑂ 707 |
| 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 OpenImageIO if
- You want the OpenImageIO feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C++
- You evaluated both and OpenImageIO 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 OpenImageIO
OpenImageIO is a C++ toolset and format agnostic image I/O library for reading, writing, and processing images across the file formats used in visual effects and animation, built for VFX studios and the developers of renderers, compositors, viewers, and other production pipeline software.
read the full OpenImageIO overview →
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Frequently asked questions
Is rembg or OpenImageIO more popular?
rembg has 24,991 GitHub stars and OpenImageIO has 2,378. rembg has the larger community by that measure.
Are rembg and OpenImageIO free?
Both are open source. rembg is licensed under MIT and OpenImageIO under Apache-2.0. Neither carries a licence fee.
What is the difference between rembg and OpenImageIO?
rembg is written in Python and OpenImageIO in C++. 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 OpenImageIO?
Choose rembg if you want the larger community (24,991 stars) or its MIT licence terms. Choose OpenImageIO if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.