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Azure Cosmos DB alternatives: 4 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave Azure Cosmos DB: request-unit pricing is hard to predict, and costs grow quickly with multi-region writes. We ranked 4 alternatives by how directly each one replaces Azure Cosmos DB, then by reviews, real visits and how recently each app's facts were checked against its own website. Amazon DynamoDB currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1Amazon DynamoDB logoAmazon DynamoDBFree plan + paidNoWeb3 of 366.5
2MongoDB Atlas logoMongoDB AtlasFree plan + paidNoWeb4 of 462.6
3Firebase logoFirebaseFree plan + paidNoWeb, iOS, Android4 of 459.6
4CockroachDB logoCockroachDBPaidNoWeb, Self-hosted4 of 457.2
  1. Amazon DynamoDB logo

    1. Amazon DynamoDBTop pick

    Best for: AWS-based teams building serverless apps that need predictable performance at scale

    Free plan + paidWeb

    66.5

    score / 100

    Why switch from Azure Cosmos DB

    AWS's serverless NoSQL equivalent.

    Pros

    • Serverless scaling without capacity planning on on-demand mode
    • Multi-region global tables and point-in-time recovery
    • Integrates tightly with Lambda and other AWS services

    Cons

    • Data model must be designed around access patterns in advance
    • Limited ad-hoc querying compared with SQL
    • Only available on AWS
    Visit Amazon DynamoDB Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Amazon DynamoDB a good Azure Cosmos DB alternative?

    Verified facts

    3 of 3 verified
    Pricing options
    On-demand and provisioned
    Checked Oct 25, 2026aws.amazon.com(opens source in a new tab)
    Free tier
    Yes
    Checked Oct 25, 2026aws.amazon.com(opens source in a new tab)
    Database type
    NoSQL key-value
    Checked Oct 25, 2026aws.amazon.com(opens source in a new tab)
  2. MongoDB Atlas logo

    2. MongoDB Atlas

    Best for: Teams building on MongoDB who want it managed on their preferred cloud

    Free plan + paidWeb

    62.6

    score / 100

    Why switch from Azure Cosmos DB

    Managed MongoDB on Azure or other clouds, with the full MongoDB feature set.

    Pros

    • Run by the MongoDB company on AWS, Google Cloud or Azure
    • Built-in full-text and vector search
    • Free cluster for learning and prototypes

    Cons

    • Dedicated clusters get expensive as data grows
    • Database only, with no end-user auth or storage layer
    • Document modelling can be awkward for heavily relational data
    Visit MongoDB Atlas Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is MongoDB Atlas a good Azure Cosmos DB alternative?

    Verified facts

    4 of 4 verified
    Free cluster
    512MB storage, free forever
    Checked Oct 25, 2026mongodb.com(opens source in a new tab)
    Flex cluster
    Up to $30/month
    Checked Oct 25, 2026mongodb.com(opens source in a new tab)
    Dedicated cluster
    From $56.94/month
    Checked Oct 25, 2026mongodb.com(opens source in a new tab)
    Search
    Full-text and vector search built in
    Checked Oct 25, 2026mongodb.com(opens source in a new tab)
  3. Firebase logo

    3. Firebase

    Best for: Mobile and web teams who want realtime sync, auth and push messaging from one vendor

    Free plan + paidWeb, iOS, Android

    59.6

    score / 100

    Why switch from Azure Cosmos DB

    Managed NoSQL with client-side SDKs and auth included.

    Pros

    • Mature SDKs for Android, iOS, Flutter and web
    • Realtime sync and offline support built into the client libraries
    • Wide set of mobile services such as crash reporting and push messaging

    Cons

    • Ties your app closely to Google Cloud
    • NoSQL query limits often force data duplication
    • Pay-as-you-go bills can spike with heavy reads
    Visit Firebase Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Firebase a good Azure Cosmos DB alternative?

    Verified facts

    4 of 4 verified
    Free plan
    Spark plan (no-cost)
    Checked Oct 25, 2026firebase.google.com(opens source in a new tab)
    Paid plan
    Blaze, pay as you go
    Checked Oct 25, 2026firebase.google.com(opens source in a new tab)
    Database
    Firestore, a NoSQL document database
    Checked Oct 25, 2026firebase.google.com(opens source in a new tab)
    SQL option
    PostgreSQL via Firebase SQL Connect
    Checked Oct 25, 2026firebase.google.com(opens source in a new tab)
  4. CockroachDB logo

    4. CockroachDB

    Best for: Teams running critical, multi-region workloads that need consistent SQL and high availability

    PaidSelf-hostableWeb, Self-hosted

    57.2

    score / 100

    Why switch from Azure Cosmos DB

    Globally distributed SQL if you need relational data across regions.

    Pros

    • Survives node, zone and region failures
    • Postgres wire compatibility for drivers and ORMs
    • Fine-grained control over where data lives

    Cons

    • Not every Postgres feature or extension is supported
    • Higher write latency than single-node databases
    • Costly compared with simple managed Postgres for small apps
    Visit CockroachDB Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is CockroachDB a good Azure Cosmos DB alternative?

    Verified facts

    4 of 4 verified
    Free trial
    30 days with $400 credit
    Checked Oct 25, 2026cockroachlabs.com(opens source in a new tab)
    Standard tier
    $0.092 per vCPU-hour
    Checked Oct 25, 2026cockroachlabs.com(opens source in a new tab)
    Postgres compatibility
    Yes
    Checked Oct 25, 2026cockroachlabs.com(opens source in a new tab)
    Advanced tier SLA
    99.999% on AWS, GCP and Azure
    Checked Oct 25, 2026cockroachlabs.com(opens source in a new tab)

The best Azure Cosmos DB alternative for…

The highest-ranked app in this list for each need.

Amazon DynamoDB logo

Best Azure Cosmos DB alternative for most people

Amazon DynamoDB

AWS's serverless NoSQL equivalent.

MongoDB Atlas logo

Best Azure Cosmos DB alternative for a free plan you can upgrade

MongoDB Atlas

Managed MongoDB on Azure or other clouds, with the full MongoDB feature set.

CockroachDB logo

Best Azure Cosmos DB alternative for self-hosting

CockroachDB

Globally distributed SQL if you need relational data across regions.

Firebase logo

Best Azure Cosmos DB alternative for iPhone and Android

Firebase

Managed NoSQL with client-side SDKs and auth included.

Amazon DynamoDB logo

Best Azure Cosmos DB alternative for working in the browser

Amazon DynamoDB

AWS's serverless NoSQL equivalent.

Azure Cosmos DB alternatives: common questions

What is the best alternative to Azure Cosmos DB?

Amazon DynamoDB ranks first right now. AWS's serverless NoSQL equivalent. MongoDB Atlas and Firebase follow it in our ranking.

Is there a free alternative to Azure Cosmos DB?

Yes. Amazon DynamoDB (free plan + paid), MongoDB Atlas (free plan + paid) and Firebase (free plan + paid) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Azure Cosmos DB?

None of the 4 alternatives in this list is open source.

Why do people switch from Azure Cosmos DB?

The complaints we hear most: request-unit pricing is hard to predict; costs grow quickly with multi-region writes; only available on Azure.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Azure Cosmos DB, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.