head to head · open source
ImageToolbox vs Concat
ImageToolbox has 15,296 GitHub stars, 659 forks, 0 open issues and last shipped yesterday. Concat has 13,787 stars, 1,701 forks, 44 open issues and last shipped yesterday. ImageToolbox leads on adoption by 11% (15,296 vs 13,787 stars). ImageToolbox is written in Kotlin under Apache-2.0; Concat is written in Rust under AGPL-3.0. ImageToolbox has attracted 4% as many forks as stars, Concat 12%. ImageToolbox 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
| ImageToolbox | Concat | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 14K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Kotlin | Rust |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 659 | ⑂ 1.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ImageToolbox if
- You weight community size — 15K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Kotlin
- You value the larger contributor base for long-term maintenance
pick Concat if
- You want the Concat feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Rust
- You evaluated both and Concat fits your workflow better
About ImageToolbox
Image Toolbox 🗺️ Project Overview ImageToolbox is a versatile image editing tool designed for efficient photo manipulation. It allows users to crop, apply filters, edit EXIF data, erase backgrounds, and even enhance images with AI. Ideal for both photographers and developers, the tool offers a simple interface with powerful capabilities. 📔 Wiki Check out Image Toolbox Wiki for FAQ and useful info ✈️ Telegram Links [ ](
read the full ImageToolbox overview →
About Concat
Concat The truly free, and open source cross platform CapCut replacement. Your logo here Sponsor Concat and your name, logo and link take this slot Your logo here Sponsor Concat and your name, logo and link take this slot Your logo here Sponsor Concat and your name, logo and link take this slot Your logo here Sponsor Concat and your name, logo and link take this slot Your logo here Sponsor Concat and your name, logo and link take this slot Your logo here Sponsor Concat and your name, logo and link take this slot About Concat is a free, open source video editor and a CapCut alternative for macOS, Windows, Linux…
read the full Concat overview →
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Frequently asked questions
Is ImageToolbox or Concat more popular?
ImageToolbox has 15,296 GitHub stars and Concat has 13,787. ImageToolbox has the larger community by that measure.
Are ImageToolbox and Concat free?
Both are open source. ImageToolbox is licensed under Apache-2.0 and Concat under AGPL-3.0. Neither carries a licence fee.
What is the difference between ImageToolbox and Concat?
ImageToolbox is written in Kotlin and Concat in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, ImageToolbox or Concat?
Choose ImageToolbox if you want the larger community (15,296 stars) or its Apache-2.0 licence terms. Choose Concat if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.