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Technology · head to head

MongoDB vs PlanetScale

MongoDB logo

MongoDB

Technology

The developer data platform

From
Free
Rated
-
Full reviewWebsite
PlanetScale logo

PlanetScale

Database & Data Management

The MySQL-compatible serverless database

From
$15/month
Rated
-
Full reviewWebsite

The short version

  • Only MongoDB has a free tier, so it costs nothing to try first.
  • Each has a real cost: MongoDB 16 MB maximum document size limits large single objects; PlanetScale eBS High Availability requires 3-node configuration with replication overhead
  • They diverge on capability: MongoDB covers Document model, PlanetScale covers Database Branching.

Where they differ

Only the attributes on which MongoDB and PlanetScale actually diverge.

Attributes where MongoDB and PlanetScale differ
AttributeMongoDBPlanetScale
Starting priceFree$15/month
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsCloud (Atlas), Self-hosted, Multi-cloud (AWS, Google Cloud, Azure)Cloud-hosted (AWS, GCP, Azure)
CategoryTechnologyDatabase & Data Management
Founded20072018

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in MongoDB

  • Document model
  • Distributed architecture
  • ACID transactions
  • Real-time analytics
  • Full-text search
  • Time series data
  • Geospatial queries
  • Aggregation framework

Only in PlanetScale

  • Database Branching
  • Non-blocking Schema Changes
  • Insights
  • Horizontal Scaling
  • Connection Pooling
  • Query Caching
  • Automatic Backups
  • Global Replication

Both cover

  • Node.js

What people use each for

The jobs each tool is most often brought in to do.

MongoDB

  • Mobile applicationsnot PlanetScale
  • Content managementnot PlanetScale
  • Real-time analyticsnot PlanetScale
  • IoT applicationsnot PlanetScale
  • Gaming backendsnot PlanetScale

PlanetScale

  • MySQL database hosting with automatic failover and replicationnot MongoDB
  • Vitess-based sharding for horizontal scaling across large datasetsnot MongoDB
  • Cloud provider flexibility across AWS, GCP, Azure with 60+ regionsnot MongoDB
  • Cost-effective database clusters using ARM64 architecture optionsnot MongoDB

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

MongoDB

  • 16 MB maximum document size limits large single objects
  • No native JOIN support for relational data operations
  • Higher memory usage due to storing field names with each document
  • Eventual consistency in distributed deployments can cause data stale reads

PlanetScale

  • EBS High Availability requires 3-node configuration with replication overhead
  • EBS Non-HA single-node option lacks redundancy and automatic failover
  • Pricing varies by cloud provider and region, requiring queries for specific rates
  • ARM64 architecture only available on EBS tier, not Metal deployments

Pricing, plan by plan

MongoDB

Free
  • M0Free
    • 512 MB storage
    • Learning and exploration
  • M2$9/month
    • 2 GB storage
    • Development and testing
  • M5$25/month
    • 5 GB storage
  • M10+$56.94/month
    • Dedicated clusters for production

PlanetScale

$15/month

No published plan breakdown. See the PlanetScale review.

Which should you pick?

Choose MongoDB if

  • You need document model.
  • You want to start without paying.
  • You work on Cloud (Atlas), Self-hosted, Multi-cloud (AWS, Google Cloud, Azure).
  • You also want distributed architecture.
MongoDB review

Choose PlanetScale if

  • You need database branching.
  • You work on Cloud-hosted (AWS, GCP, Azure).
  • You also want non-blocking schema changes.
PlanetScale review

Questions people ask

Is MongoDB or PlanetScale better?
Neither clearly leads. MongoDB starts at Free and PlanetScale at $15/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, MongoDB or PlanetScale?
MongoDB has a free tier; the other does not. Paid plans start at Free for MongoDB and $15/month for PlanetScale.
Does MongoDB or PlanetScale run on more platforms?
MongoDB runs on Cloud (Atlas), Self-hosted, Multi-cloud (AWS, Google Cloud, Azure). PlanetScale runs on Cloud-hosted (AWS, GCP, Azure).
Can I use MongoDB for free?
Yes. MongoDB has a free tier, so you can try it without paying. PlanetScale starts at $15/month.
What is MongoDB best used for?
MongoDB is most often used for mobile applications, content management, real-time analytics, iot applications. Of those, mobile applications and content management are not what PlanetScale is typically brought in for.
What can MongoDB do that PlanetScale cannot?
MongoDB covers Document model, Distributed architecture, ACID transactions, Real-time analytics. PlanetScale covers Database Branching, Non-blocking Schema Changes, Insights, Horizontal Scaling. Both handle Node.js.

Answered from the vendors’ own pages

MongoDB: Does MongoDB offer a free tier?

Yes. MongoDB Atlas offers an M0 free tier with 512 MB storage for learning and exploration, plus paid options starting at $9/month for M2 with 2 GB storage.

Source
MongoDB: Can I self-host MongoDB?

Yes. You can run MongoDB Community Edition on your own servers, or use MongoDB Enterprise Advanced for self-managed production deployments with enterprise features.

Source
MongoDB: What is the maximum document size in MongoDB?

Documents are limited to 16 MB. For documents exceeding this limit, you can use MongoDB's GridFS API to store files larger than the maximum size.

Source
MongoDB: Does MongoDB support ACID transactions?

Yes. MongoDB supports ACID transactions within a single document by default, and multi-document ACID transactions are available for replica sets and sharded clusters in MongoDB 4.0+.

Source
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