Postman is an API platform for building and using APIs. Postman simplifies each step of the API lifecycle and streamlines collaboration so you can create better APIs—faster.

Datadog is a cloud-based monitoring and analytics platform that provides observability and security for cloud-scale applications

Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.

Simulate APIs, integrations, and environments at enterprise scale.

Don’t just observe. Take action. The only app monitoring platform built for developers that gets to the root cause for every issue.

Selenium automates browsers. That's it! What you do with that power is entirely up to you.