Several document databases are popular in the industry for their robust features and scalability:
MongoDB: Known for its flexibility and scalability, MongoDB is one of the most widely used document databases. Couchbase: Offers high performance and scalability, making it ideal for real-time applications. Amazon DocumentDB: Fully managed service designed to be compatible with MongoDB, offering high availability and scalability. RavenDB: Focuses on performance and ease of use, offering features like automatic indexing and real-time alerts.