Apache CouchDB: Features, Replication and Alternatives (2026)

Vendor

Apache Software Foundation

Price

Free

Platforms

Linux, Windows, macOS

Licence

Apache License 2.0

Product type

Open source project (Apache 2.0)

Official site

couchdb.apache.org

Works with

PouchDB (browser and Node.js)Any HTTP clientApache Lucene (Nouveau search)

At a glance

Data model	Document (JSON documents with revisions)
Query language	HTTP API with MapReduce views, Mango queries and Nouveau search; no SQL
Consistency model	Eventually consistent between replicas; conflicts kept as revisions for the application to resolve
Replication	Multi-primary, continuous or one-off, between any CouchDB-compatible databases including PouchDB
Partitioning or sharding	Clustering across nodes; partitioned databases for grouping documents by partition key
Transactions	Single-document atomic updates; no multi-document transactions
Deployment and cloud availability	Self-managed on Linux, Windows or macOS; no managed service from the project
Licensing	Apache License 2.0, free

Short answer

CouchDB is a good fit when replication and offline sync matter more than query power: any copy can accept writes and sync later, and PouchDB brings the same protocol to browsers and mobile apps. It is free and simple to talk to over HTTP, but queries rely on MapReduce views, Mango indexes or search indexes rather than SQL, and conflicts are yours to resolve.

How we know: This profile is research-based: the current release, features, requirements and licence were checked on 7 November 2026 against the Apache CouchDB home page and the CouchDB documentation (release notes index and 3.5.x release notes). We have not run CouchDB for this profile.

Overview

Apache CouchDB stores JSON documents and exposes every operation through an HTTP/JSON API, so it works with standard HTTP tools, proxies and load balancers. Its replication protocol lets copies of a database on different clusters, servers, phones or browsers accept writes independently and sync later, keeping conflicting revisions for the application to resolve. A CouchDB cluster runs one logical database across several servers for capacity and availability.

Version 3.5 added parallel reads, QuickJS improvements (alongside SpiderMonkey 102, 115 and 128, switchable at runtime), upgrades to the Lucene-based Nouveau search, new reducers and on-by-default xxHash file checksums. 3.5.3, released on 12 October 2026, raised the minimum Erlang/OTP version to 27 and added performance fixes. PouchDB, a JavaScript database for browsers and Node.js, replicates with CouchDB for offline-first applications.

Key features

HTTP/JSON API for all operations, usable from any language or tool that speaks HTTP
Multi-primary replication between clusters, servers, browsers and devices, with conflict detection by revision
Clustering that spreads one logical database across many servers
MapReduce views written in JavaScript, plus Mango declarative queries with indexes
Nouveau full-text search based on Apache Lucene
Offline-first sync with PouchDB in browsers and mobile apps

Integrations and ecosystem

PouchDBHTTP clients and reverse proxiesNouveau search (Apache Lucene)Partitioned databasesIBM IAM API key auth plugin for the replicator (3.5.3)

Pros and cons

Pros

Replication and offline sync are core features, not add-ons
Plain HTTP/JSON API is easy to use and to put behind standard infrastructure
Permissive Apache 2.0 licence and an active release line (3.5.3 in October 2026)
PouchDB gives the same data model in the browser

Cons

No SQL and no joins; queries need views or indexes designed in advance
Conflicting revisions must be handled by the application
Single-document atomicity only
No managed service from the project; hosting is up to you or third parties

Pricing

Apache CouchDB is free open source software under the Apache License 2.0, with no paid edition from the project. Hosting and support come from your own team or third parties, priced separately.

Pricing checked on the vendor's official page on 7 November 2026. Prices change; confirm before buying.

Who it is best for

Offline-first web and mobile applications, and multi-site deployments, that need reliable two-way sync of JSON documents.

Typical use cases

Offline-first field service, inspection or retail apps that sync when connected
Replicating data between branch offices, edge sites and a central cluster
Browser applications that keep a local PouchDB copy of user data
Simple document storage behind HTTP for internal tools

Who should look elsewhere

Workloads that need ad-hoc queries, joins or multi-document transactions: see relational vs document databases.
Teams that want a managed document database with a richer query language: see MongoDB.

Verdict

Our take

Apache CouchDB remains the simplest open source way to build reliable multi-device and multi-site sync around JSON documents, and the project still ships regular releases. Choose it for replication and offline use, not for rich querying or transactions.

Frequently asked questions

What is the latest version of CouchDB?

CouchDB 3.5.3, released on 12 October 2026. It requires Erlang/OTP 27 or later and follows 3.5.0, which added parallel reads, QuickJS improvements and Nouveau search upgrades.

What is the difference between CouchDB and Couchbase?

They are separate products with a shared history. Apache CouchDB is an Apache 2.0 project with an HTTP API and multi-primary replication. Couchbase is a commercial database from Couchbase, Inc. with a key-value API, SQL++ queries and a BSL-licensed source.

Can CouchDB work offline?

Yes, through replication. Each copy, including PouchDB in a browser or app, can accept writes while disconnected and sync later; conflicts are kept as revisions for your code to resolve.

Sources

Checked November 2026.

Listed in: NoSQL & Distributed Databases.

How we research reviews and what star ratings mean: our editorial method.