1. 沙发座：
Couchbase Server 是一个开源、分布式、多模型 NoSQL 面向文档的数据库软件包，针对交互式应用程序进行了优化。它也被称为 Membase。它由 Couchbase, Inc. 开发，最初于 2010 年 8 月发布。
2. 沙发数据库：
Apache CouchDB 是一个开源的面向文档的 NoSQL 数据库，它使用多种格式和协议来存储、传输和处理其数据，它使用 JSON 存储数据，使用 MapReduce 作为其查询语言的 JavaScript，以及用于 API 的 HTTP。它由 Apache 软件基金会开发，最初于 2005 年发布。它是用 Erlang 编写的。
Couchbase 和 CouchDB 的区别：
| S.NO. | Couchbase | CouchDB |
|---|---|---|
| 1. | Developed by Couchbase, Inc. and initially released on August 2010. | Developed by Apache Software Foundation and initially released in 2005. |
| 2. | Couchbase is written in C++, Erlang, C and Go languages. | CouchDB is written in Erlang. |
| 3. | Couchbase have predefined datatypes such as boolean, string, number, etc. | In CouchDB there is no predefined datatypes. |
| 4. | Couchbase supports secondary indexes. | CouchDB supports secondary indexes via views only. |
| 5. | Couchbase supports Declarative query language (N1QL) that extends ANSI SQL to JSON. | CouchDB do not have SQL support. |
| 6. | Couchbase provides Eventual Consistency and Immediate Consistency methods to ensure consistency in a distributed system. | CouchDB only provides Immediate Consistency method to ensure consistency in a distributed system. |
| 7. | Couchbase supports ACID transactions. | CouchDB does not supports ACID transactions. |
| 8. | Couchbase has in-memory capabilities. | CouchDB does not have any in-memory capabilities. |
| 9. | Server operating systems for Couchbase are Linux, OS X and Windows. | Server operating systems for CouchDB are Android, BSD, Linux, OS X, Solaris and Windows |
| 10. | Famous companies like Lockwood Publishing, Code Weavers, MSLGROUP, The Doyle Group, etc uses Couchbase. | Famous companies like Akamai Technologies, Hothead Games, Inc., GenCorp Technologies, Vivint Solar, etc uses CouchDB. |