MongoDB Alternative on Postgres stack allows you to run Mongo workloads directly on Postgres while keeping API compatibility with Mongo. This is powered in collaboration with FerretDB.

FerretDB launch blog: https://blog.ferretdb.io/run-mongodb-workloads-ferretdb-tembo/
Tembo launch blog: https://tembo.io/blog/mongo-on-postgres

Documentation: https://tembo.io/docs/tembo-stacks/mongo-alternative