#email otp automation

What's the best email testing API in 2026? Compare FreeCustom.Email, Mailosaur, MailSlurp, Mailsac, and Mailinator on pricing, OTP extraction, WebSockets, SDK quality, and CI/CD support. Make the right choice for your team.

Need a Mailinator alternative for developers? Compare FreeCustom.Email vs Mailinator on API access, OTP extraction, SDK quality, pricing, and CI/CD support. Full code examples in JavaScript and Python.