Best Offline-First Databases of 2026

Ditto is a mobile database designed with an offline-first approach, ensuring that data remains accessible locally and consistently across various devices, even in completely disconnected scenarios. At its foundation, Ditto leverages Conflict-Free Replicated Data Types (CRDTs) to manage conflicts automatically and provide robust eventual consistency, eliminating the need for developers to create custom merge solutions. However, Ditto goes beyond the capabilities of typical offline-first databases. It innovates by enabling offline-first applications to synchronize seamlessly, even without an internet connection. Ditto stands out as the sole offline-first database that incorporates integrated peer-to-peer and mesh networking, allowing devices to connect and sync directly without relying on cloud or server infrastructure. In the absence of a network connection, Ditto-equipped devices can locate and synchronize with nearby devices using Bluetooth, peer-to-peer Wi-Fi, LAN, or cellular networks—ensuring timely updates, even in challenging environments.

RxDB is a NoSQL database designed for local-first use, particularly suited for contemporary web and mobile applications. It facilitates offline-first capabilities by saving data directly on the client side through various storage engines such as IndexedDB, OPFS, and SQLite. With real-time reactivity, RxDB allows developers to monitor changes in documents, fields, or queries, which means that UI components can reflect data updates instantly. Its adaptable replication engine offers synchronization with multiple backends and custom endpoints, providing flexibility for various use cases. Furthermore, RxDB easily integrates with different frameworks and environments, enhancing its usability. Key features include field-level encryption, schema validation, conflict resolution, backup and restoration options, as well as support for attachments and CRDTs. By minimizing server demands and enabling rapid local queries, RxDB significantly boosts performance and scalability, making it a prime choice for applications that need real-time updates, offline functionality, and uniformity across platforms. The combination of these capabilities positions RxDB as a forward-thinking solution for developers aiming to build efficient and responsive applications.

Utilize Core Data to store your application's persistent data for offline access, cache temporary information, and implement undo features on a single device. For syncing data across various devices linked to the same iCloud account, Core Data seamlessly replicates your schema into a CloudKit container. You can specify your data types and relationships using Core Data’s Data model editor, which also allows for the generation of corresponding class definitions. At runtime, Core Data is capable of managing object instances, enabling a variety of functionalities. It simplifies the process of connecting your objects to a storage solution, allowing for straightforward data saving from both Swift and Objective-C without requiring direct database management. The undo manager in Core Data monitors changes, offering the ability to revert them individually, collectively, or all at once, thus facilitating easy integration of undo and redo capabilities in your application. Additionally, it is advisable to execute potentially UI-blocking operations, such as converting JSON into objects, in the background to maintain a smooth user experience. By doing so, your application will not only enhance its performance but also ensure that users remain engaged without interruptions.

FairCom EDGE makes it easy to integrate sensor and machine data at their source - be that a factory, water treatment facility, oil platform, wind farm, or other industrial site. FairCom EDGE is the first converged IoT/Industrial IoT hub in the world. It unifies messaging and persistence with an all-in one solution. It also offers browser-based administration, configuration, and monitoring. FairCom EDGE supports MQTT, OPC UA and SQL for machine-tomachine (M2M), communication, and HTTP/REST for monitoring and real-time reporting. It constantly retrieves data from sensors and devices with OPC UA support and receives messages from machines with MQTT support. The data is automatically parsed and persisted, and made available via MQTT or SQL.