FerretDB - An open-source alternative to MongoDB is now released version 2.0. Co-founder and CEO of FerretDB, Peter Farkas, writes: 

FerretDB 2.0 represents a leap forward in terms of performance and compatibility. Thanks to changes under the hood, FerretDB is now up to 20x faster for certain workloads, making it as performant as leading alternatives on the market. Users who may have encountered compatibility issues in previous versions will be pleased to find that FerretDB now supports a wider range of applications, allowing more apps to work seamlessly.

FerretDB as an open-source and MongoDB-compatible database aimed to free users from the constraints of proprietary databases. It's perfect for users who want the flexibility of MongoDB without being tied to a specific vendor.

FerretDB latest version 2.x is leveraging Microsoft's DocumentDB PostgreSQL extension. This open-source extension, licensed under MIT, introduces the BSON data type and related operations to PostgreSQL. The solution includes two PostgreSQL extensions: pg_documentdb_core for BSON optimization and pg_documentdb_api for data operations.

According to the FerretDB team, maintaining compatibility between DocumentDB and FerretDB allows users to run document database workloads on Postgres with improved performance and better support for existing applications. Describing the engine behind the vCore-based Azure Cosmos DB for MongoDB, Abinav Rameesh, principal product manager at Azure, explains:

Users looking for a ready-to-use NoSQL database can leverage an existing solution in FerretDB (...) While users can interact with DocumentDB through Postgres, FerretDB 2.0 provides an interface with a document database protocol.

In the official blog, FerretDB team says the latest version brings an increasing in performance up to 20x for certain workloads than the previous version. 

As part of the FerretDB 2.0 launch, FerretDB Cloud is in development phase. This managed database-as-a-service option will initially be available on AWS and GCP, with support for Microsoft Azure planned for a later date. 

You can find more about the latest version statement on their blog post: FerretDB Releases 2.0: A Faster, More Compatible MongoDB Alternative.