Mailosaur review
A strong choice for automated email and SMS validation across clients, devices, and test frameworks.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Mailosaur is a cloud platform for testing email and SMS workflows, aimed at individual testers, collaborative QA teams, and enterprises validating end-to-end messaging journeys. Virtual inboxes and unlimited test email addresses support checks for delivery, content, links, codes, attachments, authentication flows, and replies. Teams can also capture and search email and SMS messages, inspect rendering across clients and devices, and extract links or codes for automated assertions.
Automation and ecosystem fit are central to the product. Mailosaur offers a REST API, official client libraries, and integrations with Cypress, Selenium, Playwright, Cucumber, Robot Framework, Postman, Insomnia, WebdriverIO, TestCafe, and Ghost Inspector. CI support includes GitHub Actions, Jenkins, and TeamCity. The feature set extends beyond message capture with WCAG 2.2 AA accessibility checks, compatibility checks across 90+ email clients, SpamAssassin-based spam and deliverability analysis, and rules for forwarding, replies, and external sending. That makes it suitable for teams embedding message validation into broader automated test workflows.
The published plans show Personal at $20 per month billed annually, with one user, support for up to three users, one inbox with unlimited email addresses, email compatibility testing, and API access for test automation. Core costs $50 per month billed annually and adds five included seats, multiple inboxes, accessibility testing, mail rules and auto-forwarding, plus POP3 and IMAP connectivity. Enterprise adds custom users and inboxes, separate permissions, SAML2 and OIDC SSO, SCIM, custom session timeouts, advanced support, and SLAs. Mailosaur fits teams that need programmable testing across email and SMS; teams seeking only basic manual inbox checks may not need its wider automation scope.
Mailosaur pros and cons
- Where it wins
- Virtual inboxes support unlimited test email addresses.
- Checks accessibility, spam, links, and compatibility across 90+ clients.
- Integrates with major test frameworks, CI tools, and a REST API.
- Where it doesn't
- There is no free plan.
- Displayed Personal and Core prices use annual billing.
- Advanced permissions, SSO, and account controls require Enterprise.
Mailosaur fact sheet, pricing and score →
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