Switch from Mailtrap in one line.
Your app keeps speaking SMTP. Change the host, and every test email lands in a Mailloop sandbox with ten times Mailtrap's free inbox.
- No credit card needed
- EU-hosted
- GDPR compliant
- App code Unchanged, still plain SMTP
- Assertions Same checks on subject, HTML, links
- Port 2525 works as before
- free emails a month
- 500 vs 50
- emails kept per sandbox, free
- 200 vs 10
- for 2,000 emails a month
- $12 vs $42
- where captured mail is stored
- EU vs US
What changes when you switch
Wait for the email, don't poll for it
waitFor holds one request open on the server until a matching email lands, then returns it parsed: subject, HTML, text, headers and attachments. The Mailtrap SDK has no wait call, so tests list the inbox in a loop.
npm install @mailloop/sdk import MailloopClient from '@mailloop/sdk';
const mailloop = new MailloopClient({ apiKey });
// Sign up in your app with the sandbox address
await app.registerUser(sandbox.emailAddress);
// Wait on the server until the email lands, no polling
const email = await mailloop.emails.waitFor(sandbox.id, {
subject: 'Verify your email',
timeout: 30_000,
});
// Assert on content
expect(email.html).toContain('/verify?token=');An address on every sandbox
Send to the sandbox from Stripe, Gmail or any other service, on the free plan too. Sandbox email address on paid plans only on Mailtrap.
See it the way Gmail and Outlook draw it
Render a captured email in Gmail, Outlook, Apple Mail and more, light and dark, from the dashboard, the API or your agent. Slide across the confirmation email: Outlook classic drops the button padding Gmail keeps. Gmail web is on the free plan. Mailtrap has device previews across 100+ client configurations, available on request on Business and Enterprise.
Try it before you switch anything off. Point one environment at Mailloop, a single CI job or staging, and leave the rest where it is. The free plan takes 500 emails a month with no card, so the suite can run on both before you move everything.
Mailloop vs Mailtrap, compared
 Mailloop | Mailtrap | |
|---|---|---|
| Plans | ||
| Free plan | Yes: 500 test emails a month | Partly: 50 test emails a month |
| Emails kept per sandbox, free | Yes: 200 | Partly: 10 |
| Entry plan | Yes: $12 for 2,000 emails and 5 sandboxes | Partly: $17 for 500 emails and 1 sandbox |
| Testing | ||
| Wait for an email in a test | Yes: waitFor in the SDK and REST API | No: Poll the message list yourself |
| Inbound address per sandbox | Yes: On every plan | Partly: Paid plans only |
| Throwaway sandbox per test run | Yes: Temporary sandboxes, up to 24 hours | Partly: Create and delete inboxes through the API |
| Screenshots in email clients | Yes: Gmail, Outlook, Apple Mail and more | Partly: Device previews on request |
| SpamAssassin score per email | Partly: Heuristic content score in the dashboard | Yes: In the UI, API and MCP server |
| Agents and data | ||
| MCP server | Yes: Hosted, sign in with OAuth | Partly: Runs locally with an API token |
| Production sending | No: Testing only | Yes: Email API, a separate product |
| Where captured mail is stored | Yes: Germany, EU | Partly: United States |
Mailtrap details checked on September 24, 2026 against mailtrap.io/pricing, their Node.js SDK, mailtrap.io/email-mcp-server and mailtrap.io/privacy. Mailloop numbers come from our pricing page.
Seen something inaccurate? Tell usKeep Mailtrap for sending. Test with Mailloop.
Mailloop only does testing, so it sits next to whatever sends your production mail. Only the SMTP settings of test and staging move.
Stays in Mailtrap
- Production sending through the Email API
- Marketing campaigns
- Sending domains and templates
Moves to Mailloop
- The test inbox for dev, CI and staging
- Assertions in your test suite
- Your coding agent's email checks
Connecting a coding agent
An agent that just changed the signup flow can check the email itself: make a sandbox, wait_for_email, read the links, render it. Both tools have an official MCP server; they connect differently.
- Mailloop
- Hosted at api.mailloop.io/mcp. The agent signs in through the browser, so no token sits in a config file.
- Mailtrap
- Runs locally over stdio (npx mcp-mailtrap) with an API token, account ID and inbox ID in the client config.
claude mcp add --transport http mailloop https://api.mailloop.io/mcp Sign up on staging with a fresh address and check the verification email.
The email arrived and the verify link opens the right page. In Gmail with dark mode the logo disappears against the header, so it needs a light outline.
One hosted MCP server, signed in with OAuth, from
- Claude Code
- Cursor
- claude.ai
- ChatGPT
What it costs at your volume
The cheapest plan on each side that captures the volume, on monthly billing. Mailtrap takes about 20% off for annual billing, Mailloop gives two months free. Above 50,000 emails a month Mailloop is priced on request.
| Emails a month | Mailloop | Mailtrap | Difference a year |
|---|---|---|---|
| 500 | $0 Free | $17 Basic | $204 less |
| 2,000 | $12 Basic | $42 Team | $360 less |
| 5,000 | $29 Pro | $42 Team | $156 less |
| 10,000 | $29 Pro | $123 Business | $1,128 less |
| 50,000 | $99 Ultra | $123 Business | $288 less |
Mailtrap prices from mailtrap.io/pricing, checked September 24, 2026. Mailloop prices from mailloop.io/pricing.
Questions from people leaving Mailtrap
Comparing more than two tools? The Mailtrap alternatives overview covers Mailpit, Mailosaur, smtp4dev and Ethereal, and there is a page on moving on from Ethereal.
Is there a free Mailtrap alternative with a bigger sandbox?
What is the Mailtrap sandbox equivalent in Mailloop?
Can I keep Mailtrap for sending and use Mailloop for testing?
How long does switching take?
waitFor is one function in your test utilities. Most of the time goes into running the suite a few times on both before removing the old credentials.Does Mailloop check spam scores like Mailtrap?
Where does Mailloop store captured email?
Last updated