The best open source alternative to Redis is DiceDB. If that doesn't suit you, our users have ranked more than 50 alternatives to Redis and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Redis are Valkey, KeyDB, CouchDB and YDB.
DiceDB is an open-source, fast, reactive, in-memory database optimized for modern hardware. Commonly used as a cache, it offers a familiar interface while enabling real-time data updates through query subscriptions.
Valkey is an open source (BSD) high-performance key/value datastore that supports a variety of workloads such as caching, message queues, and can act as a primary database. Valkey can run as either a standalone daemon or in a cluster, with options for replication and high...
Apache CouchDB is a distributed, fault-tolerant and schema-free document-oriented database accessible via a RESTful HTTP / JSON API. It includes incremental map / reduce mechanics for queries and keeps data safe with an append-only datastore.
YDB is an open source Distributed SQL Database that combines high availability and scalability with strong consistency and ACID transactions.
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.
FerretDB (formerly MangoDB) is an open-source proxy, which converts MongoDB wire protocol queries to SQL, and uses PostgreSQL as a database engine.
Hazelcast is an in-memory Open Source data grid based on Java. By having multiple nodes form a cluster, data is evenly distributed among the nodes. This allows for horizontal scalability both in terms of available storage space and processing power.
Cockroach is a distributed key/value datastore which supports ACID transactional semantics and versioned values as first-class features. The primary design goal is global consistency and survivability, hence the name.
HyperDex is the next generation key-value store. It provides a rich API, strong consistency, fault-tolerance, and transactions.
Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.
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Fork of redis, pretty much the same thing