> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tempinbox.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# TempInbox vs Mailinator

> Honest comparison for email testing: free TempInbox vs enterprise Mailinator — when each is the right choice.

**Short answer:** Mailinator is an enterprise email/SMS testing platform; TempInbox is a free, lightweight disposable inbox with an open REST API. For QA smoke tests, Playwright/Cypress signup flows, and indie/staging validation, TempInbox does the job with zero cost and zero account setup. For team-scale testing with private domains, SMS, and webhooks, Mailinator is the stronger tool.

## Comparison

|                        | TempInbox                          | Mailinator                                           |
| ---------------------- | ---------------------------------- | ---------------------------------------------------- |
| Price                  | Free                               | Free public tier; paid plans for private features    |
| Account required       | No                                 | Yes, for anything beyond public inboxes              |
| API key                | None needed                        | Required (paid tiers)                                |
| Inbox privacy          | Private, JWT-bound per browser     | Public inboxes on free tier; private domains on paid |
| Inbox lifetime         | No expiry — persists until deleted | Mail auto-expires after hours on free tier           |
| SMS testing            | No                                 | Yes (paid)                                           |
| Private custom domains | No                                 | Yes (paid)                                           |
| Webhooks               | No — polling only                  | Yes (paid)                                           |
| Load/volume testing    | No                                 | Yes (paid)                                           |
| Outbound sending       | No (receive-only)                  | Limited                                              |
| Setup time             | Seconds                            | Account + team onboarding                            |

## When Mailinator wins

Be honest about this — it wins for: SMS verification flows, dedicated private testing domains, webhook-driven pipelines instead of polling, high-volume load testing, and enterprise compliance requirements. If your team already pays for it, keep it.

## When TempInbox wins

* **Cost and friction**: no account, no API key, no billing — a CI job can use it in one curl call
* **Privacy on the free tier**: TempInbox inboxes are private by default; Mailinator's free public inboxes are readable by anyone who guesses the name
* **No expiry pressure**: inboxes persist until deleted — re-run a failed CI job an hour later against the same inbox
* **Simplicity**: three REST endpoints cover the whole workflow

## Migration is trivial

Both reduce to "create address → poll inbox → extract code." Swapping Mailinator's SDK for TempInbox's REST calls is usually under an hour — see [API Client Snippets](/guides/api-clients) for drop-in Python/Node/shell helpers and the [Playwright](/guides/playwright)/[Cypress](/guides/cypress) guides for full test examples.

## Related reading

* [Mailinator Alternative: Persistent Temp Inboxes](https://tempinbox.dev/blog/mailinator-alternative) — the consumer-angle comparison
* [QA Workflows](/guides/qa-workflows) — patterns these tools have in common