Assertible Alternatives

HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.

freemium

The Collaboration Platform for API Development

Log, monitor and measure your API usage to solve API problems fast.

SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.

See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.

freemium $15.0 / Monthly (per host)

GoReplay is an open-source tool for capturing and replaying live HTTP traffic into a test environment.

The most intuitive cross-platform REST API Client 😴

API performance, accuracy, and uptime testing. Without code.

Open source API development ecosystem

freemium

Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality in your API lifecycle, all with an easy, enjoyable developer experience.

freemium

Bugzilla, MantisBT and Subversion Hosting Software Development - Simplified

Secure REST API Rapid Development Platform

Fix data security risks before you release