Mailosaur is an email testing API that mimics some of MailSlurp's abilities. It is a small product with a small team but how does it compare to MailSlurp?
Mailosaur uses a server system based on traditional SMTP mail server model. MailSlurp on the other hand uses a REST API to abstract away MailServer limitations.
Send and receive email in code and tests
MailSlurp has integrations for languages and frameworks large and small. Some highlights include:
For a full review of Mailosaur alternatives guide.