List of the Top 4 Distributed Databases for Apache Cassandra in 2025

Design flexible, decentralized systems that can leverage the totality of your vital data history instead of relying solely on the latest updates. You have the option to either enhance your existing infrastructure or make a direct shift to cloud-based solutions. To uncover essential insights, it's crucial to grasp the entire story of your data rather than focusing just on its most recent snapshot. Datomic offers a store of immutable facts, ensuring that your applications experience solid consistency while also providing horizontal read scalability and integrated caching functionalities. As facts are never altered directly and all data remains intact by default, you gain built-in auditing features and the ability to query historical data. Furthermore, this system is designed to support fully ACID-compliant transactions, ensuring reliability in data manipulations. The information architecture of Datomic is crafted to address a wide variety of use cases effectively. With the Datomic Peer library, you can distribute immutable data across your application nodes, guaranteeing in-memory data access. Alternatively, you can utilize the client library to set up lightweight nodes specifically designed for microservice frameworks, which enhances integration and boosts performance. By harnessing these features, you can develop a profound and comprehensive understanding of your data landscape, ultimately driving better decision-making and strategic planning. This approach not only enriches your data analysis but also positions your organization for future growth and adaptability.

GaussDB (for MySQL) is an advanced distributed database service designed specifically for enterprise use, maintaining compatibility with MySQL. Its unique architecture distinguishes itself by separating compute and storage components, employing data functions virtualization (DFV) storage that can dynamically expand to support up to 128 TB for each database instance. The architecture minimizes the risk of data loss while enabling the system to manage millions of queries per second (QPS) and facilitating cross-AZ deployments. This service combines the high efficiency and reliability found in commercial databases with the flexibility typically associated with open-source systems. By decoupling the compute and storage functions and linking them through RDMA, alongside adopting a “log as database” methodology, users can experience performance that is sevenfold greater than that of conventional open-source databases. Furthermore, for improved read capacity and performance, you can swiftly add up to 15 read replicas to a primary node in a matter of minutes. GaussDB (for MySQL) guarantees complete compatibility with MySQL, enabling businesses to migrate their existing MySQL databases seamlessly without requiring extensive application redesign or sharding, thus making it a prime option for organizations aiming to modernize their database infrastructure. Ultimately, this pioneering service delivers a powerful and effective solution tailored to the demands of contemporary database management. Additionally, its ease of use and robust scalability make it an attractive choice for enterprises of all sizes.

Smart DIH is a robust data management solution that efficiently provides applications with precise, up-to-date, and comprehensive data, ensuring excellent performance, minimal latency, and a continuously available digital experience. By separating APIs from systems of record, Smart DIH replicates essential data and makes it accessible through an event-driven framework. This innovative approach allows for significantly reduced development timelines for new digital services and enables the platform to effortlessly accommodate millions of simultaneous users, regardless of the underlying IT infrastructure or cloud configurations. On the other hand, XAP Skyline stands out as a distributed in-memory development platform that guarantees transactional integrity while delivering high-speed event-driven processing with microsecond response times. It powers critical business applications that depend on real-time data, such as online trading systems, immediate risk assessment, and data processing for artificial intelligence and advanced language models. This combination of capabilities makes both platforms essential for modern digital enterprises aiming for agility and efficiency.

JanusGraph is recognized for its exceptional scalability as a graph database, specifically engineered to store and query vast graphs that may include hundreds of billions of vertices and edges, all while being managed across a distributed cluster of numerous machines. This initiative is part of The Linux Foundation and has seen contributions from prominent entities such as Expero, Google, GRAKN.AI, Hortonworks, IBM, and Amazon. It offers both elastic and linear scalability, which is crucial for accommodating growing datasets and an expanding user base. Noteworthy features include advanced data distribution and replication techniques that boost performance and guarantee fault tolerance. Moreover, JanusGraph is designed to support multi-datacenter high availability while also providing hot backups to enhance data security. All these functionalities come at no cost, as the platform is fully open source and regulated by the Apache 2 license, negating the need for any commercial licensing fees. Additionally, JanusGraph operates as a transactional database capable of supporting thousands of concurrent users engaged in complex graph traversals in real-time, ensuring compliance with ACID properties and eventual consistency to meet diverse operational requirements. In addition to online transactional processing (OLTP), JanusGraph also supports global graph analytics (OLAP) through its integration with Apache Spark, further establishing itself as a versatile instrument for analyzing and visualizing data. This impressive array of features makes JanusGraph a compelling option for organizations aiming to harness the power of graph data effectively, ultimately driving better insights and decisions. Its adaptability ensures it can meet the evolving needs of modern data architectures.