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Azure web PubSub pricing

Easily build real-time messaging web applications using WebSockets and the publish-subscribe pattern

Azure Web PubSub service is a fully-managed service that allows developers to focus on building real-time web experiences without worrying about capacity provisioning, reliable connections, scaling, encryption or authentication. The service makes it easier to deliver experiences such as chat, live broadcasting, and IoT dashboards.

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Prices are estimates only and are not intended as actual price quotes. Actual pricing may vary depending on the type of agreement entered with Microsoft, date of purchase, and the currency exchange rate. Prices are calculated based on US dollars and converted using London closing spot rates that are captured in the two business days prior to the last business day of the previous month end. If the two business days prior to the end of the month autumn on a bank holiday in major markets, the rate setting day is generally the day immediately preceding the two business days. This rate applies to all transactions during the forthcoming month. Sign in to the Azure pricing calculator to see pricing based on your current programme/offer with Microsoft. Contact an Azure sales specialist for more information on pricing or to request a price quote. See frequently asked questions about Azure pricing.

Web PubSub service is currently available in Free and Standard tiers. These tiers are differentiated by the number of concurrent connections, messages and maximum units allowed.

The following table summarises the difference between the two tiers:

Free Standard Premium
Concurrent Connections per Unit 20 1,000 1,000
Messages / Unit / Day 20,000 unlimited (free for the first 1,000,000 messages)1 unlimited (free for the first 1,000,000 messages)1
Price / Unit / Day Free $- $-
Max Units 1 100
SLA 99.9% 99.9% 99.95%
Availability Zone Support - - Yes
Fully Managed Auto Scaling - - Yes2
Customised Domain Name - - Yes
11 million messages is equivalent to 2 GB outbound traffic. 2Auto-scaling is calculated similar to manual scaling: Billing is calculated according to the time (in seconds), times the actual units in use, as a portion of daily price.


Messages may be purchased for the Premium and Standard tier.

This price is estimated based on 30.5 days of usage. Your final note will be calculated based on actual usage, on a per second basis.

Messages - Standard $- per million messages
Messages - Premium $- per million messages

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Additional resources

Azure web PubSub

Learn more about Azure web PubSub features and capabilities.

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Review the Service Level Agreement for Azure web PubSub.


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  • The instance usage for billing depends on the actual time (seconds) the instance is used per day. For example, if the instance is created and used 12 hours in a specific day, the billing will be $- (1* $- Unit/Day * 12 hours / 24 hours) in this day.
  • For billing purpose, only outbound messages from Azure Web PubSub service are counted. Ping messages between clients and servers are ignored. Message sent into the service is inbound message. Message sent out of the service is outbound message. Traffic is calculated in bytes.
  • For billing purpose, the messages larger than 2 KB are counted as multiple messages of 2 KB each, and the messages less than 2 KB are accumulated together. For example, imagine that there are 100 million outbound messages and 0.1 KB each. In this case, the billing will be $- (100 million * 0.1 KB / 2 KB * $- per million messages).
  • There are server connections and client connections with Azure Web PubSub service. By default, each application server starts with five initial connections per hub, and each client has one client connection.

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