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Software · head to head

Azure SQL vs PlanetScale

Azure SQL logo

Azure SQL

Software

Intelligent, scalable cloud database service from Microsoft

From
Free
Rated
-
Full reviewWebsite
PlanetScale logo

PlanetScale

Software

The MySQL-compatible serverless database

From
$15/month
Rated
-
Full reviewWebsite

The short version

  • Only Azure SQL has a free tier, so it costs nothing to try first.
  • Each has a real cost: Azure SQL ecosystem lock-in limits flexibility compared to open-source or multi-cloud solutions; PlanetScale eBS High Availability requires 3-node configuration with replication overhead
  • They diverge on capability: Azure SQL covers Intelligent Performance, PlanetScale covers Database Branching.

Where they differ

Only the attributes on which Azure SQL and PlanetScale actually diverge.

Attributes where Azure SQL and PlanetScale differ
AttributeAzure SQLPlanetScale
Starting priceFree$15/month
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsCloud (Microsoft Azure)Cloud-hosted (AWS, GCP, Azure)
Founded19752018

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

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 Azure SQL

  • Intelligent Performance
  • Advanced Security
  • Hyperscale
  • Serverless Compute
  • Geo-replication
  • Automatic Tuning
  • Built-in AI
  • Power BI

Only in PlanetScale

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

Both cover

  • Web support

What people use each for

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

Azure SQL

  • Transaction processingnot PlanetScale
  • Data storagenot PlanetScale
  • Application backendnot PlanetScale
  • Reportingnot PlanetScale
  • Data analyticsnot PlanetScale

PlanetScale

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

Where each one falls short

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

Azure SQL

  • Ecosystem lock-in limits flexibility compared to open-source or multi-cloud solutions
  • Managed service reduces control over database configuration and optimization tuning
  • Pricing complexity with consumption-based model can be unpredictable at scale
  • Less operational depth compared to Amazon RDS for advanced scaling scenarios
  • Azure PostgreSQL is less compelling than dedicated PostgreSQL providers outside Azure ecosystem

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

Azure SQL

Free

No published plan breakdown. See the Azure SQL review.

PlanetScale

$15/month

No published plan breakdown. See the PlanetScale review.

Which should you pick?

Choose Azure SQL if

  • You need intelligent performance.
  • You want to start without paying.
  • You work on Cloud (Microsoft Azure).
  • You also want advanced security.
Azure SQL 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 Azure SQL or PlanetScale better?
Neither clearly leads. Azure SQL 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, Azure SQL or PlanetScale?
Azure SQL has a free tier; the other does not. Paid plans start at Free for Azure SQL and $15/month for PlanetScale.
Does Azure SQL or PlanetScale run on more platforms?
Azure SQL runs on Cloud (Microsoft Azure). PlanetScale runs on Cloud-hosted (AWS, GCP, Azure).
Can I use Azure SQL for free?
Yes. Azure SQL has a free tier, so you can try it without paying. PlanetScale starts at $15/month.
What is Azure SQL best used for?
Azure SQL is most often used for transaction processing, data storage, application backend, reporting. Of those, transaction processing and data storage are not what PlanetScale is typically brought in for.
What can Azure SQL do that PlanetScale cannot?
Azure SQL covers Intelligent Performance, Advanced Security, Hyperscale, Serverless Compute. PlanetScale covers Database Branching, Non-blocking Schema Changes, Insights, Horizontal Scaling. Both handle Web support.

Answered from the vendors’ own pages

Azure SQL: Does Azure SQL Database offer a free tier?

Yes, Azure SQL Database includes a permanent free tier that provides 100,000 vCore seconds, 32 GB of data storage, and 32 GB of backup storage per month. This free tier is available for the lifetime of any Azure subscription with no expiration.

Source
Azure SQL: What pricing models does Azure SQL Database support?

Azure SQL Database offers consumption-based pricing where you pay for resources used, with no long-term commitments required. Database Savings Plans launched in March 2026 allow committing to a fixed hourly amount and save up to 35% across Azure database services.

Source
Azure SQL: Is Azure SQL Database compatible with on-premises SQL Server?

Yes, Azure SQL Database shares the same Database Engine as on-premises SQL Server. Existing databases maintain their compatibility level and continue to work after upgrades. Azure SQL Managed Instance provides even broader SQL Server compatibility dating back to SQL Server 2008.

Source
Azure SQL: What high availability features does Azure SQL Database provide?

Azure SQL Database provides automatic backups, geo-replication for disaster recovery, failover groups for automatic failover, and zone redundancy for enhanced availability. The service maintains a 99.99% availability SLA for Business Critical tier.

Source
Azure SQL: Can I use AI features with Azure SQL Database?

Yes, Azure SQL Database includes Copilot for database tasks, Intelligent Applications support, REST API endpoints for building applications, and GraphQL endpoints for modern app development.

Source
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