Mailpit vs Unspam.email
Mailpit
mailpit.axllent.org
Unspam.email
unspam.emailSide by side
| Figure | Mailpit | Unspam.email |
|---|---|---|
| Price from | Free | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 7 |
| Spec score · Email Testing Software | 8.6 (#6) | 8.3 (#10) |
| Automation | Mailpit provides a REST API for accessing, searching, deleting, sending, tagging, and releasing messages. | Scheduled tests can track placement and spam scores and email alerts when results decline. |
| Integrations | The project says Mailpit is used by projects including Laravel, DDEV, Quarkus, and Saleor, and in CI/CD pipelines. | The API is designed to receive real messages from SES, Postmark, SendGrid, Mailgun or a customer’s SMTP system. |
| Intended users | Mailpit is aimed at developers testing email functionality without sending messages to real email addresses. | The company describes the platform as serving marketers, founders, agencies, and product teams. |
| Purpose | Mailpit is an open-source utility for testing emails and SMTP delivery, with a local SMTP server, web interface, and integration-testing API. | Unspam is an email deliverability platform that checks spam signals, sender authentication, blacklists, previews, heatmaps, and inbox placement. |
| Security | The web UI supports optional HTTPS and basic authentication, while SMTP can be configured with authentication and TLS. | The privacy policy says stored data is kept on services and providers certified to ISO/IEC 27001:2013, PCI DSS, SOC 1 Type II, and SOC 2 Type II or higher. |
| Support | The troubleshooting guide invites users to raise an issue after checking existing issues first. | 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
Mailpit
Mailpit is a free, open-source tool for checking email content and SMTP delivery without sending messages to real addresses. It runs a local SMTP server alongside a web interface and REST API, and is available for Linux, macOS, Windows, Docker, and self-hosted deployment. The interface displays formatted HTML, source, text, headers, raw messages, and MIME attachments with image thumbnails. Checks include HTML and link testing, message screenshots, and optional SpamAssassin scoring. The API can access, search, send, delete, tag, and release messages; messages can also be relayed, forwarded, or used to trigger configurable SMTP errors. Mailpit can send message-summary webhooks and offers a Cypress package for integration tests. The web UI and API can use HTTPS and basic authentication; SMTP supports optional authentication and TLS. By default, SMTP listens on port 1025 without encryption or authentication. Mailpit keeps the most recent 500 messages by default.
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.