Mail.cx vs TmpKit
Mail.cx
mail.cxTmpKit
tmpkit.comSide by side
| Figure | Mail.cx | TmpKit |
|---|---|---|
| Price from | $0.82/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Plans published | 4 | 1 |
| Spec score · Temporary email services | 9.1 (#4) | 7.3 (#34) |
| Receive-only | The service receives email but does not provide email-sending functionality. | Users can read incoming messages but cannot compose, reply to, or forward email. |
| Retention | Mail is kept for 1 hour on Free and 72 hours on Pro, then automatically deleted. | The inbox expires according to the countdown shown in the app, with one extension available where offered. |
| Support | The contact page says support normally responds within two business days and prioritizes security and abuse reports. | Users can contact TmpKit through its contact form or the support email listed on its contact page. |
Plans
In their own words
Mail.cx
Mail.cx provides short-lived inboxes for developers, QA teams, and product teams checking account verification, transactional messages, notification pipelines, or application integrations. It only receives email; it does not send it. A web inbox can be opened without signup by choosing a username or generating one, and server-sent events can push arriving mail to the browser. Its REST API supports long-polling, retrieval of parsed or raw email, attachment downloads, and event delivery. API use is limited to 10 requests per second per token; long-polling allows one concurrent wait per token and 10 per address. Free messages are automatically deleted after one hour, while Pro messages are retained for 72 hours. The Free plan is free, and Pro is $9.90 a year. A separate pricing note lists paid plans from $4/mo. Mail.cx says connections use TLS and that passwords and API tokens are stored as hashes. Its terms caution that message retention and recovery are not guaranteed, and advise against relying on the service for critical, sensitive, or business-essential communications.