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It's a split decision.
CouchDB is a JSON database with an HTTP API and replication protocol built for syncing across servers, browsers and mobile devices, including offline-first applications. CockroachDB is distributed SQL: use it when PostgreSQL wire-protocol compatibility, automatic rebalancing and multi-region resilience matter more than CouchDB-style replication. CouchDB keeps software costs low when you self-host, but you own operations. CockroachDB offers managed and self-hosted deployment, with metered usage and separately billed storage, backups and transfer. Choose by data model and failure model, not scale claims alone.
01Side by side
| Apache CouchDB | CockroachDB | |
|---|---|---|
| Pricing model | Free software; hosting and operations are yours | Usage-based plans; compute, storage and other charges |
| Free access | Free to download and self-host | 30-day trial with $400 credit; no free plan |
| Open source | Open source; verify applicable license terms | Vendor does not state open-source status |
| Self-hosting | Run on your own servers or cloud provider | Self-host on Kubernetes, on-premises or hybrid |
| API | HTTP and JSON; optional MapReduce queries | PostgreSQL wire protocol and most SQL syntax |
| Integrations | PouchDB replication; HTTP proxies and load balancers | PostgreSQL drivers and ORMs |
| Deployment | Single node or clustered database | Managed, customer-cloud, self-hosted or hybrid |
| Scaling | Cluster capacity and high availability across nodes | Add nodes; automatic rebalancing and hotspot detection |
Apache CouchDB Choose Apache CouchDB if
- Choose Apache CouchDB if offline-first replication is central.
- Choose Apache CouchDB if your app works with HTTP and JSON.
- Choose Apache CouchDB if you want open-source software to self-host.
CockroachDB Choose CockroachDB if
- Choose CockroachDB if your application uses PostgreSQL drivers or ORMs.
- Choose CockroachDB if you need distributed SQL across regions.
- Choose CockroachDB if you want automatic rebalancing as nodes change.
02Pricing at real usage
CouchDB is free to download and self-host; the vendor does not publish a hosted plan or usage price. Infrastructure, operations and any cloud-provider charges are separate costs. CockroachDB has no free plan, but offers a 30-day trial with $400 credit. Its Standard example is $203/month for 2 vCPU and 100 GB, with shared infrastructure and a listed rate of $0.092 per vCPU-hour; the feature table separately lists from $0.057 per vCPU-hour. Mission Critical is $1,528/month for 12 vCPU and 100 GB at $0.162 per vCPU-hour. Storage, backups and data transfer are billed separately. Usage is metered by the minute: pay-as-you-go bills in arrears, while annual or committed-use contracts buy credits upfront. Budget for compute and variable storage, not just the example price.
03API, SDKs and integration
CouchDB exposes an HTTP/JSON API, so applications can work with it through software that supports those protocols. Its Couch Replication Protocol syncs data among server clusters, mobile phones and web browsers; PouchDB is one listed integration. The homepage links to documentation and a technical overview, and lists MapReduce as an optional query method. CockroachDB accepts PostgreSQL wire-protocol connections and supports most PostgreSQL syntax, data types, drivers and ORMs, which can reduce application changes for existing PostgreSQL clients. The homepages do not name language-specific SDKs or a CLI. Check the current driver and ORM compatibility for your language before choosing an integration path. Neither database’s homepage gives a language-by-language SDK matrix; CouchDB’s protocol-based interface and CockroachDB’s PostgreSQL compatibility are the documented integration contracts.
04Open source, self-hosting and lock-in
CouchDB is open source and can run on your own servers or with a cloud provider. Its replication protocol supports data movement between clusters and client environments, which can help when applications need offline sync. Verify the license terms that apply to your deployment. CockroachDB can be self-hosted, including on Kubernetes, on-premises or in a hybrid setup, or run as a managed service or in your cloud account. CockroachDB's homepage does not state its open-source status, so confirm license and redistribution rights before adopting it. PostgreSQL protocol support can reduce application migration work, but does not make the database identical to PostgreSQL. The vendors do not describe export formats or a full migration path on their homepages; ask about supported export formats, backups and restore procedures before committing.
Questions people ask
What is the main difference between Apache CouchDB and CockroachDB?
CouchDB stores JSON and exposes an HTTP API, with replication designed to sync data across servers and client devices. CockroachDB is a distributed SQL database that supports the PostgreSQL wire protocol and most PostgreSQL syntax, data types, drivers and ORMs. The practical choice is between CouchDB-style replication and a PostgreSQL-compatible SQL model.
What language is CockroachDB written in?
Cockroach Labs does not state CockroachDB's implementation language on its homepage. For application integration, the published compatibility detail is its PostgreSQL wire protocol and support for most PostgreSQL syntax, data types, drivers and ORMs. Check the vendor's technical documentation if the implementation language matters for your evaluation.
What are the disadvantages of Apache CouchDB?
CouchDB is a less direct fit if your application depends on a relational SQL model or PostgreSQL drivers and ORMs; its documented interface is HTTP/JSON, with optional MapReduce queries. Self-hosting also means your team handles infrastructure and operations. Its replication model is useful for offline-first sync, but it is not the same integration contract as PostgreSQL.
Which database should I choose for a globally distributed application?
Choose CockroachDB when the application needs distributed SQL, PostgreSQL compatibility, automatic rebalancing and resilience across regions. Choose CouchDB when clients need to replicate JSON data across servers, mobile devices or browsers, including through offline periods. Define whether the main requirement is SQL availability across regions or client-side replication before selecting.