Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and mess...

Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from result...

Developed as an alternative to traditionally inflexible SQL databases, the Couchbase NoSQL database is buil...

Aerospike is an open-source, modern database built from the ground up to push the limits of flash storage, ...

FerretDB is an open-source MongoDB alternative. It enables you to ditch the SSPL license and go open source...