The best open source alternative to Amazon DynamoDB is PostgreSQL. If that doesn't suit you, our users have ranked more than 50 alternatives to Amazon DynamoDB and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Amazon DynamoDB are MariaDB, Redis, CouchDB and DiceDB.
PostgreSQL is a powerful, open source object-relational database system with over 35 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
MariaDB is a backward compatible, drop-in replacement of the MySQL® Database Server. It includes all major open source storage engines.
The in-memory data store used by millions of developers as a cache, vector database, document database, streaming engine, and message broker.
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.
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...
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.
A full-stack, syncing database that runs on both server and client. Pluggable storage (indexeddb, sqlite, durable objects), syncs over websockets, and works with your favorite framework (React, Solid, Vue, Svelte).
You can think of Neo4j as a high-performance graph engine with all the features of a mature and robust database.
Open-source document database integrating NoSQL flexibility with PostgreSQL reliability, offering CRUD operations on BSON, full-text and geospatial search, vector embeddings, and schema-less data modeling for complex, cloud-ready workloads supporting MongoDB use cases.
Filesystem-backed document DBMS in Rust where every record is a Git-versionable JSON file with automatic cryptographic integrity for compliance-critical systems.
FerretDB (formerly MangoDB) is an open-source proxy, which converts MongoDB wire protocol queries to SQL, and uses PostgreSQL as a database engine.
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