Mailtrap vs Mailpit
Hosted staging inbox versus local-first capture.
What matters for developers picking email infrastructure
The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.
| Priority | Mailtrap | Mailpit |
|---|---|---|
| DX score | 8/10 | 9/10 |
| SDKs | node, python, go, ruby, php, elixir | None |
| Idempotency keys | No | No |
| Operating since | 2014 | Not published |
| Event stream | Yes | No |
| Best published rate per 1,000 | Tiers not published in comparable form | Tiers not published in comparable form |
| Webhooks | Yes | No |
| Deliverability | Good production sending posture with logs, authentication, suppression handling, and dedicated IP options on higher plans. | Not applicable; capture-only. |
| Free tier | 4,000/mo (sending), free testing tier | Free, MIT-licensed |
For a developer-owned stack running password resets, receipts, and magic links shipped from application code, Mailtrap takes SDK breadth, event stream, and webhook coverage, while Mailpit takes developer experience. On free tier, Mailtrap offers 4,000/mo (sending), free testing tier against Free, MIT-licensed from Mailpit. That ordering reflects this audience. Weigh the same table differently and the answer changes.
Side by side
| Feature | Mailtrap | Mailpit |
|---|---|---|
| DX score | 8/10 | 9/10 |
| SDKs | node, python, go, ruby, php, elixir | None |
| Webhooks | Yes | No |
| Deliverability | Good production sending posture with logs, authentication, suppression handling, and dedicated IP options on higher plans. | Not applicable; capture-only. |
| Free tier | 4,000/mo (sending), free testing tier | Free, MIT-licensed |
| Tagline | Originally a staging inbox, now a sender too. | Modern local SMTP catcher. |
| Starts at | $15/mo for 10,000 sending | Free |
| Pricing model | tiered | self-hosted |
| API | Yes | Yes |
| SMTP | Yes | Yes |
| Templates | basic | none |
| React Email | No | No |
| Inbound | No | No |
| Multi-tenant | Yes | No |
| Idempotency | No | No |
| Dedicated IP | Yes | No |
| Best for | Teams that want one vendor for staging-inbox plus production sending. | Replacing MailHog in any local or CI email-capture setup. |
Mailtrap
- ›Best-in-class staging inbox
- ›Spam, blacklist, and HTML check on captured emails
- ›Single product that covers testing and sending
- ›Generous free tier for both flows
- ›Sending product is younger than Postmark or SendGrid
- ›Reporting is less detailed than dedicated transactional providers
- ›Some testing features locked to higher plans
Mailpit
- ›Single Go binary or small Docker image with no runtime dependencies
- ›Reuses MailHog's 1025 and 8025 ports, so most existing configs work unchanged
- ›Views for rendered HTML, plain text, raw source, headers, and attachments
- ›Built-in HTML-compatibility check, link check, and spam-score view
- ›REST API and real-time inbox updates for automated tests
- ›Local development and staging only, not a production sender
- ›No hosted or shared team-inbox mode