# BiglyBT (open-source file sync and transfer app)

> BiglyBT is a free, open-source file sync and transfer app for Windows and macOS. Feature-filled Bittorrent client based on the Azureus open source project. It has 1,961 GitHub stars and is released under the GPL-2.0 license. Its source code is on GitHub at BiglySoftware/BiglyBT.

Source for BiglyBT, a feature filled, open source, ad-free, bittorrent client. BiglyBT is forked from the original project and is being maintained by two of the original developers as well as members of the community. With over 20 years of development, there's a good chance we have the features you are looking for.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/BiglySoftware/BiglyBT |
| Platforms | macOS, Windows |
| Interface | desktop GUI |
| GitHub stars | 1,961 |
| License | GPL-2.0 (open source) |
| Replaces | n/a |
| Language | Java |
| Website | https://www.biglybt.com |
| Official | no |
| Category | File sync & transfer |
| Latest release | v4.1.0.0 (May 20, 2026) |
| Last commit | Oct 7, 2026 |

## Install

Download a build for your system from the project's releases (https://github.com/BiglySoftware/BiglyBT/releases) or website, or build it from source by following the README.

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