Appwrite - ~15.7K stars
- Docker based
- Realtime support across all services
- Advanced security features (virus-scanning, data encryption, auto SSL, rate-limiting)
- Cross-platform: supports Web, Flutter, Desktop, Mobile and backend - over 10 SDKs: https://appwrite.io/docs/sdks
- Cloud Functions with +15 runtimes in multiple languages
Parse Server - ~16K stars
- javascript based
- mongodb or postgres database
- Has dockerfile
nakama - ~2.2k stars
- go based
- cockroach db
- designed for use with games
Apache Usergrid - ~900 stars
- Java based
- cassandra database
kuzzle - ~600 stars
- javascript based
- custom db? elasticsearch storage?
- maybe no asset storage (unless can use the persistent data api)
CloudBoost - ~1.3k stars
- JS based
- mongodb database
SkyGear - ~300 stars
- Seems v. complete but not many users (harder to fix issues)
- Go based
para - ~300 stars
- database agnostic
- java based
loopback 4 - ~1.6k stars
- More of an api development platform than a BaaS, added here because could be good starting point if developing own BaaS
- Javascript based
Platform as a service? Is one needed alongside BaaS? Dokku markets itself as mini heroku, maybe a good one to try first (e.g. Flynn, tsuru, openshift, dokku, cloud foundry)