Catch booking issues before your users do
Ensure flawless communication across the full journey, from booking confirmations and travel alerts to check-in reminders.
Trusted by businesses of all sizes
Be prepared for all journeys
Whether you’re sending an SMS update to a US phone, or a booking confirmation to a customer in Germany, consistency matters.
Mailosaur gives you numbers from around the world and unlimited test email addresses, so you can test things just as your customers experience them. No hacks, no forwarding, no personal accounts.
Communication is the backbone of every booking
Your customers travel for all sorts of reasons. Be it for a sunny holiday or family emergency, the last thing they need is to be guessing when it comes to where they should be, what to do when they arrive, and how to check in.
Mailosaur helps travel platforms test the entire journey, from booking to check-in, across email and SMS. So your team can send confidently, fix fast, and ensure guests stay informed.
How have other customers used Mailosaur?
Department for Education
Dept for Education ensured secure, reliable 2FA testing and met UK data residency needs with Mailosaur’s robust infrastructure and EU/UK-based storage options.
UpBup
UpBup saved time testing parent accounts and delivered a high-quality, custom-built platform with faster, smoother testing using Mailosaur.
Domino's
Domino's Pizza streamlined QA workflows and increased test efficiency by integrating Mailosaur into their automation stack.
Ready to learn more?
Get started with a free demo or 14-day trial
With a free trial and easy integration, you're minutes away from seeing how Mailosaur could be the answer to your testing needs.
Empower your team to test every unique booking journey
Your guests don’t all use the same phone, or the same language, so why should your QA team? Mailosaur lets you preview transactional emails and SMS across devices, email clients, and light and dark modes. From boarding passes to regional promotions, ensure every message renders as intended.
Automate more than you ever thought possible
Not all workflows benefit from the repetitive nature of manual testing.
Mailosaur allows you to automate more than you ever thought you could, including both email and SMS, covering booking confirmations, itinerary changes, and even time-sensitive alerts like gate changes.
See how crucial emails render before you hit send
From journey updates to travel insurance invoices and account setup flows, your emails may 'work' as they should, but will they render properly for every user?
Preview your emails across devices, email clients, and even light and dark modes and ensure a smooth journey for every customer.
Don't just take our word for it...
We would definitely recommend Mailosaur to other businesses looking to improve their email automations, mainly for its ease of use, and the speed at which you can adopt the platform into your automations through its API access.
QA team at Coupa
Security you can rely on
With the highest standard of physical security and environmental controls, all of our systems are protected by up-to-date encryption protocols, cipher suites, and encrypted at rest using AES-256. Mailosaur is also ISO27001 certified, and PCI DSS compliant.
Works with any stack
Mailosaur provides official libraries and plugins for all major programming languages and test frameworks.
Our products
Email testing
Create end-to-end tests that rely on email. Test account verification emails, password resets, email tracking, and more
SMS testing
Build text messages that work. Create end-to-end tests that cover identity verification, alerting, promotional messages and more
Email previews
Instantly see how your email will look to any recipient, no matter what email client they use, so there are no nasty surprises
Frequently asked questions
Yes, Mailosaur is unique in its ability to test both email and SMS.
This means that you can test product messaging functionality end to end, for example if a flow requires you to go from an email, to then get an OTP code through SMS, and then an email confirmation.
This allows you the greatest visibility of your customer journey and to optimise both email and SMS communications.
Yes. Mailosaur is designed for testing sensitive workflows like account verification, password resets, payment alerts, and two-factor authentication notifications.
You can test safely in development or staging, control data retention, and avoid using real customer data, making it suitable for teams with strict security or compliance requirements.
Yes, we will work with you to build a solution tailored to you and your team's needs, which may include things like access to phone numbers in any of our supported countries, extra seats, high volume SMS capabilities and hands-on onboarding along with support throughout.
Reach out to our team in order to discuss the possibilities.
We are completely transparent when it comes to security, so your first port of call is to take a look at our 'Security and Trust' page.
Beyond that, you are welcome to reach out to our friendly team, especially if you require something like a Security Assessment Pack.
Yes. You can start with a 14‑day free trial to explore Mailosaur on your own.
If you’d prefer guidance, you can also book a demo to discuss your specific use case, whether that’s marketing email QA, automated transactional testing, or authentication workflows, before making a decision.
Our documentation pages will show how quick and easy it is to integrate Mailosaur with your existing stack.
There are specific guides for popular test frameworks as well as for our official API client libraries.
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Book a demo or start your 14 day free trial and see what all the fuss is about.