FerretDB is a truly open-source, MongoDB-compatible database that supports MongoDB workloads using the MongoDB wire protocol, drivers, and tools, with PostgreSQL as a backend
FerretDB is a truly open-source, MongoDB-compatible database that supports MongoDB workloads using the MongoDB wire protocol, drivers, and tools, with PostgreSQL as a backend. It offers an alternative for teams seeking open-source database infrastructure and reduced vendor lock-in; the available sources note that it does not provide full MongoDB feature parity.