Arti 2.5.1 released

by opara | August 4, 2026

Arti is our ongoing project to create a next-generation Tor implementation in Rust. We're happy to announce the latest release, Arti 2.5.1.

This release consists mostly of internal improvements and bug fixes, as well as our ongoing development towards using Arti as a relay and as a directory authority. For onion service hosts, onion services can now be configured to connect to unix socket addresses. Arti also now has experimental support for congestion control and Counter Galois Onion cryptography on onion service circuits, which we hope to make stable soon.

For full details on what we've done, including API changes, and for information about many more minor and less-visible changes, please see the CHANGELOG.

For more information on using Arti, see our top-level README, and the documentation for the arti binary.

Thanks to everybody who's contributed to this release, including Andrew Kloet, Jérôme Charaoui, hjrgrn, pryty26, ramdoys, and syphyr.

Also, our deep thanks to our sponsors for funding the development of Arti!

Comments

We encourage respectful, on-topic comments. Comments that violate our Code of Conduct will be deleted. Off-topic comments may be deleted at the discretion of the moderators. Please do not comment as a way to receive support or to report bugs on a post unrelated to a release. If you are looking for support, please see our FAQ, user support forum or ways to get in touch with us.