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General availability for Azure Search S3, S3 High Density, and new regions

Azure Search announces general availability of the S3 and S3 HD pricing tiers as well as availability in two new regions.

Today, we are excited to announce general availability of the S3 tier of service! The S3 tier of Azure Search is designed to handle large volumes of documents and heavy traffic. Identically priced and backed by the same high performance CPUs and SSD storage, the S3 tier comes in two configurations: S3 and S3 High Density (HD).


The standard S3 tier of Azure Search is suited for customers with large numbers of documents and can handle many hundreds of queries per second. With each partition supporting 120 million documents (or 200 GB), it is possible to search up to 1.4 billion documents (or 2.4TB) in a single search service while still maintaining low latency for high query volumes.

S3 High Density

The S3 HD tier is targeted at ISVs and SaaS providers who build applications which support a large number of relatively small indexes in a single search service. In fact, Microsoft Dynamics 365 has been using Azure Search’s S3 HD tier to power its search experience for thousands of its online customers:

“Dynamics 365 (online) took a huge leap forward and paved the way for significant future search innovation by leveraging Azure Search. Delivering a high level of performance and functionality, the S3 HD SKU makes it straightforward and cost-effective to manage Azure Search for thousands of Dynamics 365 customers.”

– Mike Carter, Principal Program Manager, Dynamics 365

In a single S3 HD service, there can be up to 3,000 indexes which can each support 1 million documents which makes it an attractive option to support numerous smaller applications with many low-cost indexes. You can read more about multitenant applications and Azure Search.

  Free Basic Standard S1 Standard S2 Standard S3 Standard S3 HD
SLA No Yes Yes Yes Yes Yes
Storage 50MB 2GB 25GB/partition 100GB/partition 200GB/partition 200GB/partition (max 600GB/service)
Max Indexes 3 5 50 200 200 1000/partition (max 3000/service)
Documents Hosted 10000 1 million 15 million/partition (max 180 million/service) 60 million/partition (max 720 million/service) 120 million/partition (max 1.4 billion/service) 1 million/index (max 200 million/partition)
Scale-out Limits n/a Up to 3 replicas/service Up to 36 units/service Up to 36 units/service Up to 36 units/service Up to 12 replicas/service and 3 partitions/service

S3 HD does not currently support indexers. Pricing information can be found here.

New Regions: Canada Central and West Central US

With a truly global presence, Azure Search makes it possible to serve applications across the world with minimal latency. Now available in Canada Central and West Central US, Azure Search can be provisioned in 14 regions: East US, West US, North Central US, South Central US, West Central US, North Europe, West Europe, East Asia, Southeast Asia, Japan West, Brazil South, Australia East, Central India, and Canada Central.

Try it out!

For more information on these new Azure Search tiers and pricing, please visit our pricing page or create your own Search service.

Learn more about Azure Search and view documentation.