RavenDB

RavenDB is a document-oriented NoSQL database designed for storing and querying JSON documents. Developed by Hibernating Rhinos and led by Oren Eini, it emphasizes developer productivity and operational simplicity, offering ACID guarantees within a single database, a built-in indexing system, and a HTTP-based API for interacting with data.

In RavenDB, data is stored as JSON documents organized into collections. Each document has a unique identifier and can contain nested objects and arrays. Queries are performed through RavenDB’s query language options, including Raven Query Language (RQL) and LINQ, with support for map/reduce operations. The database uses indexes to speed up queries, and it provides auto-indexing to create common indexes automatically. Full-text search is built on an integrated Lucene-based indexing mechanism, enabling powerful search capabilities over document fields.

Key features include multi-database deployments, built-in clustering with replication and failover, and scalable indexing. RavenDB also offers a web-based administration UI known as RavenDB Studio, which helps manage databases, indexes, security, and monitoring. Security options include authentication and authorization controls, with support for TLS and certificates in deployment scenarios. Client libraries are officially maintained for multiple languages, including .NET, Java, Node.js, and Go, enabling applications to interact with RavenDB from various platforms.

RavenDB supports deployments on premises, in the cloud, or in containers, and runs on Windows and Linux environments. It is distributed under a dual-licensing model, providing an open-source community edition along with enterprise features for larger deployments. The database is commonly used in microservices, modern web applications, and other workloads that require transactional integrity, flexible schemas, and real-time querying.