FerretDB (formerly MangoDB) is an open-source proxy, which converts MongoDB wire protocol queries to SQL, and uses PostgreSQL as a database engine.
Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Mac
- Windows
- Linux
- Online
- Self-Hosted
Apps similar to FaunaDB include FerretDB, which is free and open source. Other options are Codehooks.io, OrbitDB and HarperDB. In total there are four Backend as a Service like FaunaDB for the web, Mac, Windows, Linux and self-hosting.
FerretDB (formerly MangoDB) is an open-source proxy, which converts MongoDB wire protocol queries to SQL, and uses PostgreSQL as a database engine.
Codehooks.io is a minimalistic approach to backend as a service which lets you get real quickly. Deploy an API using built-in NoSQL database storage, message queues & scheduled jobs. Perfect for Apps, JAMstack sites, IoT and automation.




OrbitDB is a serverless, distributed, peer-to-peer database. OrbitDB uses IPFS as its data storage and IPFS Pubsub to automatically sync databases with peers. It's an eventually consistent database that uses CRDTs for conflict-free database merges making OrbitDB an excellent...
HarperDB is a database that optimizes the data value chain for any size company without sacrificing features, functionality and stability. HarperDB is designed to handle most workloads on a single product.
