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Astra DB is a serverless, multi-cloud DBaaS built on Apache Cassandra.

Developer friendly APIs and limitless scale in minutes.


Start coding in 5 min. No credit card required.

  • GraphQL, REST, JSON/Document APIs
  • Zero-ops Cassandra compatible DBaaS
  • Up to 80GB storage and 20 million read/write operations (using free $25/mo credit)
  • Chat and community support


Enterprise discounts and expert support for mission critical apps.

  • All of the benefits of the Pay As You Go plan plus:
  • Volume discounts with annual commits
  • Health checks for optimal sizing and performance
  • 24x7 Enterprise Support
  • Option to add Premium Support for 15 minute response times and access to a Named Engineer / Technical Account Manager

Please for enhanced support needs, migrations or other help you might need.

Astra DB can also be purchased through the , or marketplaces. →

Supported Cloud Providers
Cloud Provider
Cloud Provider
Cloud Provider


Support Type


Support Goals

Low Response Time

24 hours

Normal Response Time

24 hours

High Reponse Time

4 hours

Urgent Response Time

1 hour


15% of monthly usage

How Astra DB Billing Works

Pricing is simple from start to scale.

Pay as you go

Pay as you go

Astra DB’s pricing is simple and transparent, based on the volume of data, and the numbers of operations.



No more sizing your database to match your application workload. Astra DB auto-scales up and down based on actual usage.

Zero Ops

Zero Ops

Save significant engineering and operations effort typically spent on sizing, provisioning, monitoring, and tuning.

Metering Details

Billing Unit
Metering Details

Read requests

A “Read Request Unit” (RRU) is the unit of measure for billing database reads.

It is based on the payload of each read query response.

A read request that returns up to 4KB of data is considered one RRU. If the request returns more than 4KB of data, additional RRUs are required. If the read request involves an ALLOW FILTERING query the data is measured prior to in-memory filtering.

Write requests

A “Write Request Unit” (WRU) is the unit of measure for billing database writes.

It is based on the payload size of each write request.

A write request with up to 1KB of data or a DELETE request are each considered one WRU. If the request has more than 1KB of data, additional WRUs are required.

A write index SAI is considered as a write request. The write index SAI size (and the number of WRUs required) is based on the size of each indexed column (not the size of the index), regardless of the column type.

Note: Writes in a multi-region configuration are billed for each region written to.


“Data Storage” means all data stored into the Database including the data, indexes and metadata.

Storage is calculated based on logical storage consumption. Data Storage is measured in GB per month, using the maximum data stored in the given month for the usage calculation.

You are not billed extra for standard backups of your data (It is included in the base storage costs).

Data Transfer

“Data Transfer” means the transfer of Customer Data out of the database. Billable units and pricing vary depending on whether the Data Transfer occurs within the same region of a cloud provider network (“Data Transfer - Same Region”), across regions within the same cloud provider network (“Data Transfer - Cross Region Within Cloud Provider Network”), or leaves the cloud provider network over the internet (“Data Transfer - Internet”).

Data Transfer charges are measured in GB.

Optional Features
Metering Details

Private Endpoint

Creating a “Private Endpoint” allows users to securely connect applications and third party SaaS offerings to Astra DB.

Users are billed at a fixed rate per hour plus data transfer charges per GB. Data transfer charges using private endpoints are for the transfer of Customer Data into and out of the database.

Cloud providers will also bill for use of private endpoint capabilities.


“Multi-Region” means replicating the database between multiple cloud regions enabling users to write to and read from multiple regions.

Additional charges include network egress between regions which is billed per GB. This cost is based on the source region. Users will also incur a one-time data transfer charge to replicate all data to the newly added region.

See additional pricing and billing information

Metering Unit Rates



Write Request Units (per 1M)




Read Request Units (per 1M)




Data Storage (GB/month)




Data Transfer (GB) - Same Region




Data Transfer (GB) - Cross Region Within Cloud Provider Network




Data Transfer (GB) - Internet




Private Endpoint ($0.01/hr and data transfer charge of $0.01/GB ingress and egress)

Please note that DataStax may charge a higher rate for a specific region (by cloud provider) than what is shown in the pricing table.

See our full list of regions

Pricing Examples

Example 1
Example 2

Ready to see how Astra DB pricing will work for you?

Pricing FAQ

Here is a list of the most frequent questions we get about pricing.

1 Astra DB service credit is valued at $1. For example, if you have 100 Astra DB service credits, you have $100 worth of credits that can be used for Astra cloud services.

The Astra DB service credit list price is $1. Discounts are available if you purchase an annual commitment.

No, the Astra DB service credits will burn down as they are consumed. We will help you size your app(s) but the actual usage is based on the categories mentioned above and may vary from the estimated usage numbers.

Yes, the Astra DB service credits (associated with enterprise plans) expire 365 days after the plan start date. However, you may extend the expiry date for 3 months by paying a 10% fee on the amount paid for the remaining Astra DB service credits to be extended.

We have built-in volume discounts with deeper discounts for annual commits. .

No, this is totally in your control - your database, your choice. We are available on Google Cloud, Amazon Web Services & Microsoft Azure.

Yes, for AWS, Google Cloud, and Azure, 100% of the Astra DB subscription cost will count towards the committed spend.

Details including available credits can be found .

This information is publicly available and can be found .

Chat and community support are included for free with the Astra DB free plan.

Chat and community support, plus one Enterprise support ticket, are included for free with the Astra DB Pay As You Go plan, which can be upgraded to 24x7 Enterprise support with unlimited tickets for a fee.

24x7 Enterprise support is available for the Astra DB Annual plan, which is priced as a percentage of monthly Astra usage.

Customers with Enterprise support can purchase the add-on for 15 minute (versus 1 hour) urgent response times and access to a Named Engineer/Technical Account Manager.

You receive your invoice via email once a month. You will be able to see your consumption in the Astra console.

You can pay for Astra DB via credit card, through your preferred cloud marketplace, or purchase Astra DB service credits via a direct contract with DataStax.

If you run out of credits, your database will be temporarily paused until you resolve your payment issue. If you are on an Enterprise plan, you will be notified and will have 30 days to resolve your payment issue or your database will be suspended.

You will be notified and will have 30 days to resolve your payment issue or your database will be suspended.

Have a Question?

Our team is standing by to answer anything that is on your mind.

Request an Astra DB demo and see how it can make Cassandra easier!

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DataStax, is a registered trademark of DataStax, Inc.. Apache, Apache Cassandra, Cassandra, Apache Pulsar, and Pulsar are either registered trademarks or trademarks of the Apache Software Foundation.