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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.

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  • Always free*
  • GraphQL, REST, JSON/Document APIs
  • Zero-ops Cassandra compatible DBaaS
  • Deploy on AWS, Azure or Google Cloud
  • Up to 80GB storage and 20 million read/write operations (using free $25/mo credit)
  • Standard support


Enterprise discounts and expert support for mission critical apps.

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  • All of the benefits of the Pay As You Go plan plus:
  • Volume discounts with annual commits
  • Option to add additional Enterprise support including 15 minute initial response times

Estimate your costs with the pricing calculator

Please contact us for enterprise plans, enhanced support needs, migrations or any other help you might need.
*Free Tier is for an indefinite period of time which can be terminated upon written notice by DataStax.

Supported Cloud Providers





Support Type

Local Region

Local Region



Support SLAs

Low Response Time

24 hours

24 hours

24 hours

24 hours

Normal Response Time

24 hours

24 hours

24 hours

24 hours

High Reponse Time

12 hours

8 hours

4 hours

4 hours

Critical Response Time

8 hours

1 hour

1 hour

15 mins

Uptime SLA







6% of monthly usage

9% of monthly usage

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. If a write request requires an index update (SAI only), each index update is measured as 1 WRU.

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 actual data, indexes and metadata.

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

You are never 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 into and out of a cloud region.

Data Transfer charges are measured in GB per month.

Note: Does not apply to multi-region. See Optional Features section.

Optional Features
Metering Details

Private Link

Creating a “Private Link 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 standard data transfer charges per GB.

Cloud providers will also bill for use of private link 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.

Unit Rates


North America

Write Request Units (per 1M)




Read Request Units (per 1M)




Data Storage (GB/month)




Data Transfer (by GB/month)




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

Pricing Examples

This example demonstrates how Astra DB charges using serverless pricing

Example 1

You deploy a database in the AWS US East (North Virginia) region. For a period of 15 days, you receive little traffic to your application, resulting in 200,000 reads and 100,000 writes to your database each day. However, on day 16 your application traffic spikes to 600,000 reads and 300,000 writes until the end of the month. Astra DB scales to deliver a seamless experience to your users, with no manual intervention. Likewise your database starts at 5GB and grows to a total of 50GB by month end. Your pricing is based on writes and reads plus the peak storage used in the month. The following table summarizes your total bill of $21.26 for the month. All users get a monthly credit of $25, as a result you don’t have to pay DataStax for this month’s usage.

(Day of Month)
Total Reads Total Writes Storage
1-15 3,000,000 reads (200,000 reads x 15 days) 1,500,000 writes (100,000 writes x 15 days) 5 GB
16-30 9,000,000 reads (600,000 reads x 15 days) 4,500,000 writes (300,000 writes x 15 days) 50 GB
Monthly operations 12,000,000 reads 6,000,000 writes 50 GB (maximum size)
Itemized bill $2.88 ($0.24 per million reads x 12 million reads) $5.88 ($0.98 per million writes x 6 million writes) $12.50 (50 x $0.25)
Total Costs $21.26
Example 2

This example demonstrates Astra DB charges using multiple regions on Google Cloud for one month. You start with Astra DB deployed in Northern Virginia (NA) and expand to 2 additional regions, one in the Belgium (EMEA) region and another in Mumbai (APAC) region. When the user writes to the N Virginia region, that same write operation will be replicated in the Belgium region and Mumbai region so the user will be charged for 7 million writes (4M from NA, 2M from EMEA, 1 M from APAC ) along with the associated data transfer charges (1kb).

Operations NA EMEA APAC
Writes per Million 4M 2M 1M
Reads per Million 8M 4M 2M
One Time Data Transfer 250GB    
Ongoing Data Transfer 75GB 25GB 10GB
Storage 250GB 250GB 250GB
Write Charges $22.19 = (7 * $.98) + (7 * $1.16) + (7 * $1.03)
Read Charges $4.70 = (8 * $.33) + (4 * $.39) + (2 * $25)
One Time Data Transfer Charge $70 = (250 * 2 * $.14)
Ongoing Data Transfer Charge $31.8 = (75 * $.14 * 2) + (25 * 2 * $.16) + (10 * 2 * $.14)
Data Storage Charges $197.50 = (250 * 0.25) + (250 * 0.27) + (250 * 0.27)
Total Costs $326.19 (includes one time data transfer)

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 credits are valued at $1.

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 expire 365 days from the Order Schedule Effective Date. However, you may extend the expiry date by 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. Contact us.

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

For Google Cloud and Azure - 100% of the Astra DB Fees will count towards the committed spend. With AWS, it's 50%. So if you spend $100k, you would only retire $50k towards your AWS committed spend.

Details including available credits can be found here.

This information is publicly available and can be found here.

The basic level of support is included with all tiers of Astra DB. Support fees are subject to which level of support your business requires. More details can be found here.

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.

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.