It's being driven by Sentryopens in a new tab, and it's not formally launching until October this year (2024), but HTTP Toolkit along with a selection of other open source-focused businesses like Astralopens in a new tab, Scalaropens in a new tab and Val Townopens in a new tab are signing up in advance as part of the first wave. On top of that, all of HTTP Toolkit's own code is 100% open source, I personally maintain plenty of other projects (I'm one of the maintainers of Node.js, plus various smaller libraries like loglevelopens in a new tab) and there's been a long series of code contributions from HTTP Toolkit back to upstream projects along the way too.