Yes, CloudFlare has software, and I think that only further highlights the difference between a complex cloud provider and a piece of software. What good is CloudFlare's software without the vast global network to back it up? Pick a problem, though, and there's probably an open source solution though: CockroachDB for global HA dbs, there's a bunch of containerized drop-in S3 API replacements, etc. But something tying them all together requires a lot of ops work that you don't get through software alone.