Mailosaur

Mailosaur provides email and SMS testing infrastructure designed for developers and QA teams building automated test suites. It offers programmatic access to inboxes via APIs and SDKs, allowing test scripts to send, receive, and inspect messages without manual checking. The platform integrates with testing frameworks like Selenium, Cypress, Playwright, and Puppeteer, enabling assertions on email content, links, and attachments as part of CI/CD pipelines. It also includes tools for previewing how emails render across different clients and devices, along with spam and deliverability checks. Teams building transactional email, authentication flows, or notification systems use the service to catch bugs before messages reach real users.