What is the difference between MongoDB Atlas and CockroachDB?

MongoDB Atlas is best for Teams wanting managed NoSQL database in the cloud, while CockroachDB is best for Teams wanting distributed SQL that survives anything. MongoDB Atlas starts at Free and CockroachDB starts at Free.

Is MongoDB Atlas or CockroachDB cheaper?

MongoDB Atlas starts at Free with a free tier. CockroachDB starts at Free with a free tier.

Is there a free alternative to CockroachDB?

Both MongoDB Atlas and CockroachDB offer free tiers.

MongoDB Atlas vs CockroachDB

MongoDB Atlas is Managed MongoDB service with auto-scaling, full-text search, and multi-cloud support, while CockroachDB is Distributed SQL database designed for global scale, resilience, and strong consistency. CockroachDB is open source and can be self-hosted, giving you full control over your data. MongoDB Atlas is built for teams wanting managed nosql database in the cloud, whereas CockroachDB targets teams wanting distributed sql that survives anything.

At a glance

	MongoDB Atlas	CockroachDB
Best for	Teams wanting managed NoSQL database in the cloud	Teams wanting distributed SQL that survives anything
Starting price	Free	Free
Free tier	✓	✓
Open source	—	✓
Free tier available	✓	✓
Open source	—	✓
Charts	✓	—
Distributed SQL	—	✓
Document DB	✓	—
Multi-Cloud	✓	—
Multi-Region	—	✓
PostgreSQL Compatible	—	✓
Search	✓	—
Serverless	—	✓

MongoDB Atlas

Strengths

Includes Document DB as a core feature, purpose-built for database workflows
Includes Search as a core feature, purpose-built for database workflows
Free M0 cluster — generous enough for most small teams to get real work done
Includes charts alongside the core feature set — fewer separate tools needed

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Ecosystem of third-party integrations is smaller than the market leaders in database
Mobile experience lags behind the desktop version in features and polish

Try MongoDB Atlas → Full review

CockroachDB

Strengths

Open source and transparent
Includes Distributed SQL as a core feature, purpose-built for database workflows
Fully open-source — you can self-host, audit the code, and avoid vendor lock-in
Free 10 GiB — generous enough for most small teams to get real work done

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Enterprise-focused design means the interface can feel heavy for smaller teams
Ecosystem of third-party integrations is smaller than the market leaders in database
Community support can be slower than the dedicated support teams at commercial alternatives

Try CockroachDB → Full review

The bottom line

Pricing: Both tools offer free tiers, so you can test each before committing. MongoDB Atlas's free plan: Free M0 cluster. CockroachDB's free plan: Free 10 GiB.

Feature gaps: MongoDB Atlas offers Charts, Document DB and Multi-Cloud that CockroachDB lacks. CockroachDB brings Distributed SQL, Multi-Region and PostgreSQL Compatible that MongoDB Atlas does not have.

Team fit: MongoDB Atlas is geared toward any size teams, while CockroachDB is aimed at enterprise teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Open source: CockroachDB is open source, meaning you can self-host, audit the code, and avoid vendor lock-in. MongoDB Atlas is proprietary — you are trusting the vendor with your data and uptime.

Where each tool shines: MongoDB Atlas's biggest strengths are: includes document db as a core feature, purpose-built for database workflows. includes search as a core feature, purpose-built for database workflows. CockroachDB's biggest strengths are: open source and transparent. includes distributed sql as a core feature, purpose-built for database workflows.

Watch out for: With MongoDB Atlas, users commonly note that free plan exists but key features are locked behind the paid upgrade. With CockroachDB, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose MongoDB Atlas if...

Your profile matches its sweet spot: teams wanting managed nosql database in the cloud
You specifically need Charts and Document DB
You care about includes search as a core feature, purpose-built for database workflows
Your team size fits the any size profile MongoDB Atlas is designed for
The free tier works for you: free m0 cluster

Choose CockroachDB if...

Your profile matches its sweet spot: teams wanting distributed sql that survives anything
You need self-hosting, data sovereignty, or the ability to audit source code
You specifically need Distributed SQL and Multi-Region
You care about includes distributed sql as a core feature, purpose-built for database workflows
Your team size fits the enterprise profile CockroachDB is designed for