Email & SMS testing for startups
Mailosaur helps startups safely test emails and SMS, like sign‑ups, password resets, and OTPs, so small errors don’t turn into customer‑visible problems.
Trusted by fast-growing teams
Stop worrying about what customers might see
Broken links, missing content, expired codes, or emails that look fine in an editor but break in real inboxes- these are easy to miss and very public when they happen.
Mailosaur gives you a safe place to catch those issues quietly, before customers ever notice. No workarounds. No checking personal inboxes. No crossed fingers after deploy.
Simple setup, even if it’s just you
Create test email addresses instantly, send messages from your app, and see exactly what arrives. No complex configuration, no infrastructure to maintain, and no need for a dedicated QA team.
Many startups use Mailosaur day one, even with a single developer or founder running the tests themselves.
Loved by startups
5.0
A great, affordable, digital marketing solution. Does email and SMS really well and doesn't break the bank.
Start manually. Automate later.
Create test email addresses instantly, send messages from your app, and see exactly what arrives.
No complex configuration, no infrastructure to maintain, and no need for a dedicated QA team.
Centralise message testing early
As products grow, message testing often becomes messy, with personal inboxes, shared phones, copy‑paste checks and forgotten edge cases taking centre stage.
Mailosaur gives you one clean place to test your email, SMS, OTPs, verification links, and confirmations, while also allowing you to generate device-accurate email previews- so all of your functional and visual checks can be done in one place.
Our products
Everything you need to test customer communication
Email testing
Create end-to-end tests that rely on email. Test account verification emails, password resets, email tracking, 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.
SMS testing
Build text messages that work. Create end-to-end tests that cover identity verification, alerting, promotional messages, and more
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