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  "path": "/arti_2_4_0_released/",
  "publishedAt": "2026-06-03T10:59:27.796Z",
  "site": "https://blog.torproject.org",
  "tags": [
    "flow control and congestion control",
    "1960",
    "CHANGELOG",
    "README",
    "arti binary",
    "sponsors",
    "announcements",
    "releases"
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  "textContent": "Arti is our ongoing project to create a next-generation Tor implementation in Rust. We're happy to announce the latest release, Arti 2.4.0.\n\nThis release continues our ongoing development towards using Arti as a relay and as a directory authority. It also contains fixes for a number of bugs affecting onion service client connectivity.\n\nAdditionally, as of this release, flow control and congestion control is considered stable, and can be enabled by compiling Arti with the `flowctl-cc` feature.\n\nUsers of the `arti-client` crate should note that there are multiple breaking changes to the `TorClient` APIs, and that the `use_obsolete_software` option has been removed (see #1960).\n\nAs usual, this release also contains a number of bugfixes, cleanups, and improvements to our CI infrastructure.\n\nFor 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.\n\nFor more information on using Arti, see our top-level README, and the documentation for the arti binary.\n\nThanks to everybody who's contributed to this release, including Aaron Dewes, Andrew Kloet, Boris Nagaev, Neel Chauhan, Nihal, syphyr.\n\nAlso, our deep thanks to our sponsors for funding the development of Arti!\n\n  * \n          announcements\n        \n  * \n          releases\n        \n\n",
  "title": "Arti 2.4.0 released: Relay and directory authority development; flowctl-cc stable",
  "updatedAt": "2026-06-01T00:00:00.000Z"
}