Google Storage, Amazon S3 and OpenStack are supported online Cloud storage services. There are two branches of S3QL – S3QL-1.x and 2.x. The latter being the current active branch, with more features than the former. The 1.x branch does not get new features, only bugfixes. The other difference between the two branches is that the 1.x branch is compatible with Python 2.7, while the 2.x branch is compatible with Python 3.3.