Membase Server is Now Couchbase Server
In January 2012, Couchbase Server replaced Membase Server as the Couchbase database offering. Users looking for Membase Server should upgrade to Couchbase Server 2.0 to take advantage of great new features: a flexible data model, easy scalability, consistent high performance, and always-on capability. Information on upgrading to Couchbase Server 2.0 can be found here.
Couchbase Server 2.0 has client libraries for Java, C#/.NET, C/C++, Ruby and PHP. For more details, visit our Develop page. Like Membase Server, Couchbase Server also maintains 100% protocol compatibility with memcached for which there are hundreds of client libraries supporting many languages.
For more detail on the background behind the product name change, please refer to Couchbase CEO Bob Wiederhold's blog.