Mailosaur vs Unspam.email
Mailosaur
mailosaur.com
Unspam.email
unspam.emailSide by side
| Figure | Mailosaur | Unspam.email |
|---|---|---|
| Price from | $20/mo | $5/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 3 | 7 |
| Spec score · Email Testing Software | 7.9 (#14) | 8.3 (#10) |
| Email previews | Email previews show rendering across clients, devices, and light and dark modes using real devices. | The service previews email rendering across more than 50 real clients and devices in light and dark modes. |
| Headquarters | The Square, Basing View, Basingstoke, Hampshire RG21 4EB, United Kingdom | The company lists 167 Madison Avenue, Suite 205, New York, New York 10016, United States, and a Barcelona office. |
| Integrations | Mailosaur lists integrations and guides for frameworks and tools including Cypress, Playwright, Selenium, Cucumber, Robot Framework, Postman, Insomnia, WebdriverIO, TestCafe, PowerShell, and Ghost Inspector. | The API is designed to receive real messages from SES, Postmark, SendGrid, Mailgun or a customer’s SMTP system. |
| Support | The Enterprise plan includes advanced support and SLAs, an account manager, and support for custom terms. | The company lists support chat and [email protected] for support or product inquiries. |
Plans
Unspam.email
- FreeFree
- No accountFree
- Custom plan$5 a month
- Basic$9 a month
- Business$19 a month
- Agency$29 a month
- White LabelPriced on request
In their own words
Unspam.email
Unspam.email is an email deliverability platform for examining spam signals, sender authentication, blacklists, previews, and inbox placement. Spam tests assess authentication, sender reputation, blacklists, and message content, then show which checks affected the score. Inbox placement tests send a campaign to seed mailboxes at Gmail, Outlook, Yahoo, and other providers and report where it landed. Email previews cover rendering across more than 50 real clients and devices in light and dark modes. Scheduled tests can track placement and spam scores and send alerts by email when results decline. Its API has 39 endpoints across seven areas and can test mail sent through SES, Postmark, SendGrid, Mailgun, or a sender’s own SMTP setup; an MCP server lets compatible AI clients run tests and retrieve results. The free plan includes 21 tests per month, unlimited sender accounts, and 14-day data retention, but excludes DMARC monitoring and full API access. Custom costs $5 a month, with a $5 monthly minimum and pay-per-test rates.