Hi Sandyk,
Depending on your needs, if you think about tests that can be fully automated and not visual testing (such as email rendering), you can use such tools as SOAP UI and Postman to achieve some automated tests use cases, by using the SOAP API or JS API, you can do it directly on the server or remote connection allowed to call API (soaprouter.jsp service).
SOAP UI can also be used for Load performance use cases.
Regards
J-Serge