Assertible Alternatives

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

freemium

Biggest library of ready-made API collections for Postman

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.

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

The most intuitive cross-platform REST API Client 😴

RdpGuard allows you to protect your Remote Desktop (RDP), POP3, FTP, SMTP, IMAP, MSSQL, MySQL, VoIP/SIP from brute-force attacks by blocking attacker's IP address. Fail2Ban for Windows.

Paw is a REST client for Mac.

StopLight, providing engineering teams with the best way to document, test, and build web APIs.

Intrusion prevention framework

Syspeace is a Intrusion Detection and Prevention System prevents brute force attacks on Microsoft Windows Servers. Syspeace keeps your data safe.

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

RESTClient can be used to test variety of HTTP communications and RESTful webservices.