Mailpit for your laptop. Mailloop for the team.
A Mailpit alternative for the moment the inbox has to be shared. Staging, CI and teammates send to one hosted sandbox, and even your coding agent can read it. Nothing to run or patch.
- 500 emails a month, no card
- EU-hosted
- Plain SMTP, any language
Deploy the preview branch, sign up with a fresh address and check the welcome email.
The welcome email arrived from the preview deployment and both links open the right pages.
When do you need a Mailpit alternative?
When the inbox has to leave your laptop. Mailpit is right for one developer on localhost. Once CI, QA or an agent needs the email, someone has to host and protect it. Mailloop does that job.
What a hosted sandbox adds
Separate inboxes and real accounts
One mailbox per running instance. Messages are grouped with tags, not separate inboxes. In Mailloop every environment gets its own sandbox and every teammate their own login: 5 sandboxes and 5 members from $12 a month, 200 emails kept per sandbox even on the free plan.
No service container in the pipeline
With Mailpit each CI job starts its own catcher and polls its API. With Mailloop the job sends to a hosted sandbox and waits with one call, and it works the same when the app under test is a preview deployment on another host.
Mailpit vs Mailloop
Both catch mail over plain SMTP and never deliver it. The difference is where the inbox lives and who can open it.
| Mailpit Self-hosted, free | Mailloop Hosted sandbox | |
|---|---|---|
| Where it runs | Your laptop or a server you maintain | Hosted in the EU, nothing to deploy |
| Who opens the inbox | Anyone with the one shared password | Teammates, each with their own login |
| Separate inboxes | One mailbox per instance, grouped with tags | A sandbox per project or environment |
| A test waits for the email | Poll the search API in a loop | One waitFor call, held open on the server |
| Mail from outside | Unreachable on localhost | Every sandbox has a public address |
| Client screenshots | HTML drawn in your own browser | Gmail, Outlook, Apple Mail and more, over the API too |
| Coding agents | No official MCP server | Hosted MCP server with OAuth |
| Cost | Free, you run the machine | Free for 500 emails a month, then from $12 |
Mailpit facts checked on September 26, 2026 against its documentation and GitHub releases. Mailloop numbers come from our pricing page.
Where Mailpit is the better choice
It is a very good tool. Stay with it when these matter more than a shared inbox.
Free, with no cap
No account, no quota and no rate limit. For one developer on one laptop it costs nothing, and a load test can push as much mail as the machine handles.
Nothing leaves your network
Mail stays on localhost or a server you control, which settles it for teams that may not hand test data to any third party.
Deeper HTML checks
HTML check (over 175 checks mapped to caniemail.com) and link check built in. Spam score only if you run a SpamAssassin server or connect Postmark's spam API. Mailloop's content score is a lighter heuristic and is not in the API.
Chaos mode
Mailpit can answer with SMTP errors on purpose, at a probability you set, so you can test how your app retries. Mailloop has nothing like it.
What about Mailtrap Local?
Mailtrap now ships its own free local catcher: one MIT-licensed binary with a web UI and a REST API. Its README is clear that it is not a team tool, with no user accounts, no authentication and no shared sandboxes. It sits next to Mailpit, not next to a hosted sandbox.
Choosing a local catcher
- Compare Mailtrap Local with Mailpit
- Both are free and single-user
Sharing the inbox
- Mailloop vs Mailtrap Sandbox
- Teams, CI and agents in one sandbox
Mailpit and Mailloop, common questions
Moving off MailHog? Read Mailloop vs MailHog, or compare six tools in the Mailtrap alternatives overview.
Can I share a Mailpit inbox with my team?
Is Mailpit a good choice for CI?
Does Mailpit have a wait-for-email API?
What is Mailtrap Local?
Can I use Mailpit and Mailloop together?
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