What is the difference between PlanetScale and MongoDB Atlas?

PlanetScale is best for Teams running MySQL at scale who need safe schema migrations, while MongoDB Atlas is best for Teams wanting managed NoSQL database in the cloud. PlanetScale starts at $39/mo and MongoDB Atlas starts at Free.

Is PlanetScale or MongoDB Atlas cheaper?

PlanetScale starts at $39/mo. MongoDB Atlas starts at Free with a free tier.

Is there a free alternative to PlanetScale?

Yes, MongoDB Atlas offers a free tier (Free M0 cluster).

PlanetScale vs MongoDB Atlas

PlanetScale is Serverless MySQL platform with branching, non-blocking schema changes, and unlimited scalability, while MongoDB Atlas is Managed MongoDB service with auto-scaling, full-text search, and multi-cloud support. The biggest difference up front: MongoDB Atlas is free, while PlanetScale starts at $39/mo. PlanetScale is built for teams running mysql at scale who need safe schema migrations, whereas MongoDB Atlas targets teams wanting managed nosql database in the cloud.

At a glance

	PlanetScale	MongoDB Atlas
Best for	Teams running MySQL at scale who need safe schema migrations	Teams wanting managed NoSQL database in the cloud
Starting price	$39/mo	Free
Free tier	—	✓
Open source	—	—
Free tier available	—	✓
Open source	—	—
Auto-scaling	✓	—
Charts	—	✓
Database Branching	✓	—
Document DB	—	✓
Multi-Cloud	—	✓
Query Insights	✓	—
Schema Migrations	✓	—
Search	—	✓

PlanetScale

Strengths

Git-like branching for safe schema changes
Non-blocking schema migrations with zero downtime
Built on Vitess for proven horizontal scalability
Excellent developer experience and CLI tools

Weaknesses

No free tier — minimum $39/month commitment
No foreign key constraint support by default
MySQL only — no Postgres option
Vendor lock-in with proprietary branching features

Try PlanetScale → Full review

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

The bottom line

Pricing: MongoDB Atlas is completely free (Free M0 cluster), which makes it the obvious pick if budget is the top concern. PlanetScale starts at $39/mo. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.

Feature gaps: PlanetScale offers Auto-scaling, Database Branching and Query Insights that MongoDB Atlas lacks. MongoDB Atlas brings Charts, Document DB and Multi-Cloud that PlanetScale does not have.

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

Where each tool shines: PlanetScale's biggest strengths are: git-like branching for safe schema changes. non-blocking schema migrations with zero downtime. 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.

Watch out for: With PlanetScale, users commonly note that no free tier — minimum $39/month commitment. With MongoDB Atlas, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose PlanetScale if...

Your profile matches its sweet spot: teams running mysql at scale who need safe schema migrations
You specifically need Auto-scaling and Database Branching
You care about non-blocking schema migrations with zero downtime
Your team size fits the small teams profile PlanetScale is designed for

Choose MongoDB Atlas if...

Your profile matches its sweet spot: teams wanting managed nosql database in the cloud
Budget is a hard constraint — MongoDB Atlas is free, PlanetScale is not
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