Mailpit
6.9#9 in email testing softwareFree planFree planWebAPILinuxmacOS
VisitMailpit vs MailSlurp
What both publish
| Fact | Mailpit | MailSlurp |
|---|---|---|
| Automation | Mailpit provides a REST API for accessing, searching, deleting, sending, tagging, and releasing messages. | Webhooks, filtering rules, forwarding, automatic replies and attachment automations route and process messages. |
| Integrations | Mailpit can send message-summary webhooks to external services, has been tested with n8n, and has a Cypress package for integration tests. | The integrations directory lists 79 items, including SDKs, Playwright, Cypress, Selenium, BrowserStack, Zapier, Power Automate, UiPath, Postman, GraphQL and webhooks. |
| Security | The web UI supports optional HTTPS and basic authentication, while SMTP can be configured with authentication and TLS. | The security policy says data at rest is encrypted with AES-256, data in transit uses TLS/SSL, and daily backups are stored in AWS S3. |
| Security controls | The web UI and API can use HTTPS and basic authentication, while SMTP supports optional STARTTLS or SSL/TLS and authentication. | The security policy states TLS in transit, AES-256 encryption at rest, AWS RDS/S3 storage, daily backups, VPNs, network ACLs, penetration testing and RBAC. |
Mailpit plans
- MailpitFree
MailSlurp plans
- FreeFree
- Starter$19.99 a month
- Pro$49.99 a month
- Growth$129.99 a month
- EnterprisePriced on request
Pick Mailpit if…
Mailpit suits developers testing email behavior locally or in CI/CD without sending messages to real recipients. Its API, webhooks, and configurable SMTP errors are useful for integration and resilience testing.
Pick MailSlurp if…
It suits developers building email or SMS workflows and teams testing message delivery, inbox placement, or application flows. Teams handling email and attachment data may also find the JSON extraction tool relevant.