Apps similar to Apache Cassandra include PostgreSQL, which is free and open source. Other options are MySQL Community Edition, MongoDB, MariaDB and Redis. There's no shortage of Relational Databases like Apache Cassandra, with more than 50 alternatives for Linux, Windows, Mac, 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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Free GPL database software for relational and NoSQL applications, combining InnoDB and other pluggable storage engines with replication, group replication, clustering, partitioning, stored procedures, triggers, views, monitoring, connectors, and cross-platform tools.
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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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SQL Server delivers on Microsoft’s Data Platform vision by helping your organization manage your data by enabling you to store data from structured, semi-structured, and unstructured documents within the database.
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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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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...
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).
Filesystem-backed document DBMS in Rust where every record is a Git-versionable JSON file with automatic cryptographic integrity for compliance-critical systems.
Azure Cosmos DB is a NoSQL document database service designed from the ground up to natively support JSON and JavaScript directly inside the database engine. It’s the right solution for web and mobile applications when predictable throughput, low latency, and flexible query are...
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