Is Otter Browser open source?

Yes. Otter Browser is open source under the GPL-3.0 licence. Its source code is on GitHub at OtterBrowser/otter-browser and is written mainly in C++.

Is Otter Browser free?

Yes. Otter Browser is open source, so the software itself is free to use.

Can I self-host Otter Browser?

Yes. Otter Browser can be self-hosted on your own server or infrastructure.

What is Otter Browser an alternative to?

Otter Browser is an open-source alternative to ChatGPT Atlas and Safari. Other open-source alternatives to ChatGPT Atlas include Min, Brave Browser and Firefox.

Is Otter Browser actively maintained?

Yes. The most recent commit to Otter Browser was on 13 October 2026, and the latest release is v1.0.03, published on 22 February 2022. The project has 2k stars on GitHub.

Otter Browser: open-source alternative to ChatGPT Atlas

About Otter Browser

Otter Browser is a web browser that aims to recreate the best aspects of the classic Opera (12.x) user interface. It is built using the Qt5 framework.

Key features

Recreates the classic Opera (12.x) UI
Built with Qt5

Built with: C++ tools
Tags: web browser; opera ui; qt5; classic opera

Otter Browser: questions and answers

What is Otter Browser?: Otter Browser aims to recreate the best aspects of the classic Opera (12.x) UI using Qt5.
Is Otter Browser open source?: Yes. Otter Browser is open source under the GPL-3.0 licence. Its source code is on GitHub at OtterBrowser/otter-browser and is written mainly in C++.
Is Otter Browser free?: Yes. Otter Browser is open source, so the software itself is free to use.
Can I self-host Otter Browser?: Yes. Otter Browser can be self-hosted on your own server or infrastructure.
What is Otter Browser an alternative to?: Otter Browser is an open-source alternative to ChatGPT Atlas and Safari. Other open-source alternatives to ChatGPT Atlas include Min, Brave Browser and Firefox.
Is Otter Browser actively maintained?: Yes. The most recent commit to Otter Browser was on 13 October 2026, and the latest release is v1.0.03, published on 22 February 2022. The project has 2k stars on GitHub.