Apache CouchDB™ lets you access your data where you need it. The Couch Replication Protocol is implemented in a variety of projects and products that span every imaginable computing environment from globally distributed server-clusters, over mobile phones to web browsers.
Store your data safely, on your own servers, or with any leading cloud provider. Your web- and native applications love CouchDB, because it speaks JSON natively and supports binary data for all your data storage needs.
The Couch Replication Protocol lets your data flow seamlessly between server clusters to mobile phones and web browsers, enabling a compelling offline-first user-experience while maintaining high performance and strong reliability. CouchDB comes with a developer-friendly query language, and optionally MapReduce for simple, efficient, and comprehensive data retrieval.
CouchDB is a terrific single-node database that works just like any other database
behind an application server of your choice.
Most people start with a single node CouchDB instance. More demanding projects can seamlessly upgrade to a cluster.
CouchDB is also a clustered database that allows you to run a single logical
database server on any number of servers or VMs.
A CouchDB cluster improves on the single-node setup with higher capacity and high-availability without changing any APIs.
CouchDB makes use of the ubiquitous HTTP protocol and JSON data format and is compatible with any software that supports them. CouchDB also works great with external tools like HTTP proxy servers, load balancers.
CouchDB is built for servers (from a Raspberry Pi to big cloud installations), while
PouchDB is built for mobile & desktop web-browsers and Couchbase Lite is built for
native iOS & Android apps.
And all of them can seamlessly replicate data with each other.
CouchDB is serious about data reliability.
Individual nodes use a crash-resistent append-only data structure. A multi-node CouchDB cluster saves all data redundantly, so it is always available when you need it.
We welcome your contributions. CouchDB is an open source project. Everything, from this website to the core of the database itself, has been contributed by helpful individuals. The time and attention of our contributors is our most precious resource, and we always need more of it. Our primary goal is to build a welcoming, supporting, inclusive and diverse community. We abide by Code of Conduct and a set of Project Bylaws. Come join us!
We run community chat channels on Freenode IRC network and Slack. IRC is open and very common, but Slack is more user-friendly. We have a Slack/IRC bridge so you can use what you prefer and your messages will be relayed.
Search all of our mailing lists at once.
This is a low-traffic list for release announcements and security disclosures.
This is a general discussion and support forum for all CouchDB users.
This is where people working on CouchDB itself discuss things.
This is where all source code and wiki change notifications are sent.