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Head-to-head · Document Databases

Azure Cosmos DB for NoSQL vs Couchbase Server

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Azure Cosmos DB for NoSQL #2 in Document Databases 9.2/10 Free plan · 30-day trial Free planFree trial✓ 3 of 3 features Visit site
Couchbase Server #6 in Document Databases 8.6/10 Free plan Free plan✓ 3 of 3 features Visit Couchbase

Azure Cosmos DB for NoSQL leads on 0 checks, Couchbase Server on 1, and 4 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAzure Cosmos DB for NoSQL · 9.2/10
  • Free planboth
  • Free trialonly Azure Cosmos DB for NoSQL

Azure Cosmos DB for NoSQL scores higher on our rubric for document databases: 9.2 against 8.6 out of 10; our editors rank them #2 and #6.

On deployment model, Couchbase Server gives you Both where Azure Cosmos DB for NoSQL offers Cloud. Couchbase Server leads on maximum document size: 20 MB versus 2 MB.

Azure Cosmos DB for NoSQL is the better fit for azure-native globally distributed applications. Couchbase Server is the better fit for self-hosted Couchbase-compatible deployments.

  • Azure Cosmos DB for NoSQL fits best

    Azure-native globally distributed applications

  • Couchbase Server fits best

    Self-hosted Couchbase-compatible deployments

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Azure Cosmos DB for NoSQL 9.2/10 Visit ↗ Couchbase Server 8.6/10 Visit ↗
At a glance
Editor score 9.2 8.6
Ranking #2 in Document Databases #6 in Document Databases
Best for Azure-native globally distributed applications Self-hosted Couchbase-compatible deployments
Pricing model Free plan + paid Free plan + paid
Starting price — —
Free plan ✓ ✓
Free trial 30 days —
Deployment Cloud Cloud, Self-hosted
Support Docs Community, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS SOC 2, HIPAA, PCI DSS
Built for Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Azure Cosmos DB for NoSQL 3/3 · Couchbase Server 3/3
Managed cloud ✓ ✓
Transactions ✓ ✓
Vector search ✓ ✓
Specs
Deployment model Cloud Both
Document formats JSON JSON, Binary
Maximum document size 2 MB 20 MB (best)
Our review
Pros
  • Global distribution with multi-region replication
  • Free tier plus a 30-day trial
  • Vector search, change feeds, and Azure integrations
  • Free Community Edition for development and production use
  • SQL++, ACID transactions, search, vector indexing, and replication
  • Runs across containers, Kubernetes, VMs, and supported operating systems
Cons
  • Paid costs vary by region and configuration
  • Transactions are limited to a logical partition
  • Cloud-only and not open source
  • Community Edition clusters are limited to five nodes from Server 7.0 onward
  • Enterprise pricing varies between marketplace and subscription models
  • Broad capabilities may exceed the needs of narrow document-storage projects
Our verdict

Azure Cosmos DB for NoSQL is a fully managed cloud database for applications that store and query schema-free JSON documents. It is aimed at Azure-native teams building SaaS platforms, IoT systems, real-time workloads, and AI applications.…

Read the review →

Couchbase Server is a distributed document database for organizations building applications around JSON and binary data. It combines key-value access with SQL++ querying, ACID transactions, full-text search, vector search and indexing,…

Read the review →
  1. Azure Cosmos DB for NoSQLDocument Databases 9.2Free plan · 30-day trial
  2. Couchbase ServerDocument Databases 8.6Free plan

Strengths and trade-offs

  • Azure Cosmos DB for NoSQL — where it wins

    • Global distribution with multi-region replication
    • Free tier plus a 30-day trial
    • Vector search, change feeds, and Azure integrations

    Where it doesn't

    • Paid costs vary by region and configuration
    • Transactions are limited to a logical partition
    • Cloud-only and not open source

  • Couchbase Server — where it wins

    • Free Community Edition for development and production use
    • SQL++, ACID transactions, search, vector indexing, and replication
    • Runs across containers, Kubernetes, VMs, and supported operating systems

    Where it doesn't

    • Community Edition clusters are limited to five nodes from Server 7.0 onward
    • Enterprise pricing varies between marketplace and subscription models
    • Broad capabilities may exceed the needs of narrow document-storage projects
  • Azure Cosmos DB for NoSQL9.2/10 · Free plan · 30-day trial

    A flexible Azure-native document database with global distribution and multiple throughput models.

    Visit siteFull verdict →
  • Couchbase Server8.6/10 · Free plan

    A broad Couchbase-compatible database with free community use and paid enterprise support.

    Visit CouchbaseFull verdict →

More comparisons

All document databases comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update