End-to-end SMS testing made simple
From OTPs to MFA, Mailosaur's SMS testing ensures every message is dispatched, delivered, and displayed exactly as you intend.
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Go beyond basic testing
Confirm every SMS reaches the right user, at the right time and contains the right information.
Test every SMS workflow reliably
Validate delivery timing, content accuracy, and message behaviour, including for one-time passcodes, verification codes, and security‑critical flows.
Automate your testing
Run SMS OTP testing, verification code flows, and SMS notification tests using Mailosaur’s API with Cypress, Playwright, Selenium, and more.
No real phones required
Test SMS using dedicated numbers across supported regions, without relying on phones or live SIMs. Perfect for reproducing regional delivery differences, and real‑world constraints.
Built for your team
From verification codes to notifications, Mailosaur is the most reliable SMS testing tool for development, QA automation, and product teams.
With options to set hierarchal permissions for your projects, it's never been easier to keep everyone on the same page.
Mailosaur allows you to
Protect access and security by testing OTPs, MFA, and time‑sensitive codes before users depend on them.
Maintain customer trust by preventing failed messages and broken verification flows.
Scale safely with high‑volume SMS testing that reflects real delivery constraints.
Designed for both manual validation and automation, with simple setup today and deeper integration when you need it.
What do our customers say
5.0
Mailosaur makes it incredibly easy to capture and inspect emails/SMS messages sent from staging or automated tests. No manual inbox juggling—everything is centralized and API-driven.
4.0
Great solution for our automated test suite to both handle real SMS and email testing programmatically.
4.5
The UI is really smooth and learning curve is minimal for this software. Even a beginner can get hold of the easy to use process and adapt very quickly.
Yes, you can automate that
By integrating Mailosaur's API with your stack, you can start high-volume, comprehensive testing in minutes, without the tedious manual checks.
With quickstart guides and documentation for most frameworks and languages, it's easy to see how Mailosaur can slot into your workflows and start saving you time.
Cover every message-driven journey
SMS testing is only part of the picture. To be confident in message‑driven experiences, teams also need to validate how emails behave, visually and functionally, across real conditions.
Mailosaur lets you test email and SMS together, so no part of the journey is left to chance.
Frequently asked questions
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