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PlanetScale vs DataStax

PlanetScale logo

PlanetScale

Software

The MySQL-compatible serverless database

From
$15/month
Rated
-
Full reviewWebsite
DataStax logo

DataStax

Software

The real-time data company for AI applications

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only DataStax has a free tier, so it costs nothing to try first.
  • Each has a real cost: PlanetScale eBS High Availability requires 3-node configuration with replication overhead; DataStax dataStax's own Astra DB documentation states the Enterprise plan is an annual, contract-based plan with negotiated pricing, meaning list prices are not published for that tier
  • They diverge on capability: PlanetScale covers Database Branching, DataStax covers Cassandra Compatible.

Where they differ

Only the attributes on which PlanetScale and DataStax actually diverge.

Attributes where PlanetScale and DataStax differ
AttributePlanetScaleDataStax
Starting price$15/monthFree
Pricing modelsubscriptionfreemium
Free tierNoYes
PlatformsCloud-hosted (AWS, GCP, Azure)Web, Aws, Azure, Gcp
Founded20182010

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 PlanetScale

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

Only in DataStax

  • Cassandra Compatible
  • Vector Search
  • Serverless
  • Multi-cloud
  • Streaming
  • CDC
  • GraphQL API
  • LangChain

Both cover

  • Web support

What people use each for

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

PlanetScale

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

DataStax

  • Real-time applicationsnot PlanetScale
  • Content managementnot PlanetScale
  • User profilesnot PlanetScale
  • Mobile backendsnot PlanetScale
  • Cachingnot PlanetScale

Where each one falls short

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

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

DataStax

  • DataStax's own Astra DB documentation states the Enterprise plan is an annual, contract-based plan with negotiated pricing, meaning list prices are not published for that tier
  • DataStax's Astra DB documentation directs Standard plan customers to IBM's watsonx.data pricing for exact consumption-based rates following the DataStax/IBM deal, rather than publishing them on DataStax's own site

Pricing, plan by plan

PlanetScale

$15/month

No published plan breakdown. See the PlanetScale review.

DataStax

Free
  • FreeFree
    • 5GB storage
    • 40M read/write ops
    • Vector search
  • Pay As You GoFree
    • Usage-based pricing
    • Multi-region
    • Enterprise support

Which should you pick?

Choose PlanetScale if

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

Choose DataStax if

  • You need cassandra compatible.
  • You want to start without paying.
  • You work on Web, Aws, Azure, Gcp.
  • You also want vector search.
DataStax review

Questions people ask

Is PlanetScale or DataStax better?
Neither clearly leads. PlanetScale starts at $15/month and DataStax at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PlanetScale or DataStax?
DataStax has a free tier; the other does not. Paid plans start at $15/month for PlanetScale and Free for DataStax.
Does PlanetScale or DataStax run on more platforms?
PlanetScale runs on Cloud-hosted (AWS, GCP, Azure). DataStax runs on Web, Aws, Azure, Gcp.
Can I use DataStax for free?
Yes. DataStax has a free tier, so you can try it without paying. PlanetScale starts at $15/month.
What is PlanetScale best used for?
PlanetScale is most often used for mysql database hosting with automatic failover and replication, vitess-based sharding for horizontal scaling across large datasets, cloud provider flexibility across aws, gcp, azure with 60+ regions, cost-effective database clusters using arm64 architecture options. Of those, mysql database hosting with automatic failover and replication and vitess-based sharding for horizontal scaling across large datasets are not what DataStax is typically brought in for.
What can PlanetScale do that DataStax cannot?
PlanetScale covers Database Branching, Non-blocking Schema Changes, Insights, Horizontal Scaling. DataStax covers Cassandra Compatible, Vector Search, Serverless, Multi-cloud. Both handle Web support.
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