At twistedmatrix.com <http://twistedmatrix.com/>, we dogfood a bunch of Twisted software: our DNS server (primary and secondary!), our web server, even a little bit of email stuff here and there. And we have our own structured logging system to make it, ahem, "easy" to put logs into some kind of a system that can tell you what Twisted is doing. But uh… we don't get a lot of value from this because the tracebacks just go into disk files that nobody ever looks at. Does anyone know if, say, Sentry supports a free tier for open source projects, or something like that? Or any other error-tracking provider even vaguely compatible with Twisted might do something like that? It would be nice to surface and fix tracebacks that affect our own infrastructure before they hit our users. -g