Mailosaur
Mailosaur: A strong choice for automated email and SMS validation across clients, devices, and test frameworks. Ranked #7 of 27 in Email Testing Software by our editors (7.8/10); pricing: 14-day trial; best for automated email and SMS test workflows.
At a glance
- Editor score7.8 / 10
- Pricing14-day trial
- Best forAutomated email and SMS test workflows
- Free planNo
- Paid from$20/mo
- Facts checked20 Sep 2026
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.
Our verdict on Mailosaur
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.
Your product? Our editors can test Mailosaur in depth and publish a review, labelled as paid · from $149/mo →
Mailosaur pricing
All 3 Mailosaur plans and prices →
Mailosaur fact sheet
| Free plan | No |
|---|---|
| Paid from | $20/mo |
| Email clients | Not verified |
| Device coverage | Both |
| Spam checks | Yes |
| Accessibility checks | Yes |
| Link checks | Yes |
| Inbox testing | Yes |
| API access | Yes |
| Free trial | 14 days |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | ISO 27001, GDPR, SSO/SAML, 2FA |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 13 integrations: Cypress, Selenium, Playwright, Cucumber, Robot Framework, Postman … See all → |
| Pricing | 14-day trial (source) |
| Website | mailosaur.com |
| Facts checked | 20 Sep 2026 |
Mailosaur integrations
Mailosaur lists 13 integrations on its own site.
- Cypress
- Selenium
- Playwright
- Cucumber
- Robot Framework
- Postman
- Insomnia
- WebdriverIO
- TestCafe
- Ghost Inspector
- GitHub Actions
- Jenkins
- TeamCity
See all Mailosaur integrations →
Alternatives to Mailosaur
- LitmusBroad pre-send email QA with previews, testing, monitoring, integrations, and APIs.9.3
- Twilio Email TestingA flexible email-testing option with a free trial, rendering checks, spam tests, and API access.8.8
- GlockAppsA broad deliverability toolkit for inbox placement, reputation, authentication, and alerts.8.5
See all Mailosaur alternatives →
Mailosaur vs the competition
- Mailosaur vs Litmus
- Mailosaur vs Twilio Email Testing
- Mailosaur vs GlockApps
- Mailosaur vs Mailtrap Email Sandbox
- Mailosaur vs MailSlurp
- Mailosaur vs Mailinator
Compare Mailosaur with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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