Azure Search vs Gatling: What are the differences?
Azure Search: Search-as-a-service for web and mobile app development. Azure Search makes it easy to add powerful and sophisticated search capabilities to your website or application. Quickly and easily tune search results and construct rich, fine-tuned ranking models to tie search results to business goals. Reliable throughput and storage provide fast search indexing and querying to support time-sensitive search scenarios; Gatling: open-source load testing framework based on Scala, Akka and Netty. Gatling is a highly capable load testing tool. It is designed for ease of use, maintainability and high performance Out of the box, Gatling comes with excellent support of the HTTP protocol that makes it a tool of choice for load testing any HTTP server. As the core engine is actually protocol agnostic, it is perfectly possible to implement support for other protocols. For example, Gatling currently also ships JMS support..
Azure Search belongs to "Search as a Service" category of the tech stack, while Gatling can be primarily classified under "Load and Performance Testing".
Gatling is an open source tool with 4.3K GitHub stars and 918 GitHub forks. Here's a link to Gatling's open source repository on GitHub.