Apps similar to Amazon DynamoDB include PostgreSQL, which is free and open source. Other options are MongoDB, MariaDB, Redis and CouchDB. You're spoiled for choice with Relational Databases like Amazon DynamoDB: we list more than 50 alternatives for Linux, Mac, Windows, self-hosting and the web.
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.
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MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need
MariaDB is a backward compatible, drop-in replacement of the MySQL® Database Server. It includes all major open source storage engines.
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The in-memory data store used by millions of developers as a cache, vector database, document database, streaming engine, and message broker.
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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.
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The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.
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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.
You can think of Neo4j as a high-performance graph engine with all the features of a mature and robust database.
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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...
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).
A fast, local-first DynamoDB GUI with real SQL: JOINs, GROUP BY and aggregates, PartiQL, and an AI agent on your own Bedrock keys.
ArangoDB database is an open-source NoSQL solution with a flexible data model for documents, graphs, and key-values.
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