When comparing Azure Search vs SearchStax, the Slant community recommends SearchStax for most people. In the question“What are the best hosted Search Engine as a Service providers?” SearchStax is ranked 10th while Azure Search is ranked 12th.
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Pros
Pro Easy to scale
Azure Search can easily be scaled up or down through the admin panel. Users can choose to allocate or de-allocate resources how they see fit.
Pro Guaranteed search performance
Azure Search provides dedicated capacity guarantees which ensure that search performance will be steady for your application.
Pro Free tier available
There's a free tier available with up to 10000 documents and 3 indices.
Pro Multi-Cloud (Available on all major public cloud providers)
Pro Includes comprehensive Solr monitoring
Pro Includes search analytics
Provides real-time feedback and insights to developers.
Pro Dedicated clusters
Gain full performance by utilizing VM offerings of underlying cloud providers.
Pro Easy setup
Developers can setup their environment using automation with client of a few buttons.
Pro Support available anytime
Pro Based on open source
Pro Available across the globe
Pro Fully dedicated VM's
All VM compute, memory, and SSD resources are dedicated to my application unlike others.
Pro Private cloud capable (available)
Can utilize private clouds within public clouds e.g. can leverage private clouds on Microsoft Azure via VNet and VNet Peering for higher security and performance.
Cons
Con Does not integrate with many environments
Azure Search supports only .NET, NodeJS and iOS out of the box at the moment.