Mailosaur vs Testmail.app
On the evidence we track, Testmail.app leads this comparison with a composite score of 82/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for email testing dev. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Mailosaur
Provides tools for validating emails and SMS messages through dedicated inboxes and phone numbers, with rendering previews across devices and email clients, integration into CI/CD pipelines, and automation via APIs and testing framework support.
Testmail.app
LeaderProvides temporary, addressable mailboxes and APIs enabling developers to capture and verify emails in automated test workflows and CI/CD pipelines without contacting real users.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Mailosaur
From $20/month (billed annually). Free 14-day trial.
- Personal$20/month (billed annually)
- Email compatibility testing
- API for test automation
- Forward emails to external addresses
- Core$50/month (popular)
- Team access
- Multiple inboxes
- Email accessibility testing
- Mail rules
- POP3/IMAP connectivity
- +1 more
- EnterpriseContact sales
- Custom users and inboxes
- SSO (SAML2/OIDC)
- Separate permissions
- Enterprise security
- Account manager
- +1 more
Testmail.app
LeaderFrom free to $299/month. Free tier with 100 emails/month. 14-day trial.
- FreeFree
- 100 emails/month
- Unlimited users, email addresses, and mailboxes
- Essential$12/month or $9/month billed annually
- 10,000 emails/month
- Full API access
- Pro$39/month or $29/month billed annually
- 50,000 emails/month
- Unlimited custom namespaces
- Visual email viewer
- Priority support
- Enterprise$129/month or $89/month billed annually
- 1,000,000 emails/month
- SSO with SAML 2.0 or OIDC
- SCIM support
- Enterprise invoicing
- 99.99% uptime SLA
- Unlimited$299/month or $269/month billed annually
- 10,000,000 emails/month
- All Enterprise features
- Unlimited custom domains
- Custom contracts with enterprise compliance support
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- Okta
Mailosaur
- Selenium
- Playwright
- Cypress
- TestCafe
- WebdriverIO
- Cucumber
- Robot Framework
- Ghost Inspector
- Postman
- Insomnia
- PowerShell
- Node.js
- Java
- Python
- Ruby
- .NET
- PHP
- Go
- JavaScript
- Microsoft Entra
Testmail.app
Leader- Microsoft Entra ID
- OneLogin
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.