If you highly value the hosted PaaS aspects of Firebase then it's good to look at (they are one of the best in that space). If you're looking for an open-source

If you highly value the hosted PaaS aspects of Firebase then it's good to look at (they are one of the best in that space). If you're looking for an open-source alternative that can be hosted in your private or public cloud, check out Couchbase Mobile (full disclosure, I'm an architect at Couchbase). We're open-source under Apache 2 and have all the database and sync functionality of Firebase. Many of our customers/users evaluate us against Firebase, it really depends on where you place the most value: PaaS, controlling your own data, open-source, etc. http://developer.couchbase.com/mobile http://developer.couchbase.com/mobile