A few of the GitHub projects I contribute to use Travis CI for build testing. However, I've noticed that some projects use travis-ci.org for build testing, while others use travis-ci.com. Both sites seem to function identically, even down to using the same UI.
What's the difference between travis-ci.org and travis-ci.com? Why do some projects use one over the other?
Travis CI originally created two separated platforms to differentiate between private repos / paid (travis-ci.com) and public repos / free (travis-ci.org).
However, as of May 2018, new users and projects (both private and public) should only use travis-ci.com (see this blog post). Note that travis-ci.org will be closed down completely on December 31st, 2020 (see this newsletter).
Although still in beta—which is a bit weird since travis-ci.org will be shut down soon—Travis CI provides a well-documented migration guide.
As of May 2018, travis-ci.org is scheduled to shut down and should no longer be used. Please refer to beatngu13's answer for updated information.
From the FAQ page for Travis Pro
Why can’t I find information on pricing on travis-ci.org?
Travis CI is, and always will be, free for open source projects.
For a list of plans and prices for private repositories, look at travis-ci.com/plans.
There is one profound difference which is a bit hard to find:
Unfortunately the free OSS public repos at travis-ci.com are restricted to 1000 free build minutes after which one will have to beg for extra build minutes for the 'trial plan'.
Travis CI announced this new pricing model at 2020-11-02. Effectively this ends generous open source offering.
Read Jeff Geerlin's comprehensive experience of migration to travis-ci.com.
