Mail.cx vs TempMaily
Mail.cx
mail.cx
TempMaily
tempmaily.coSide by side
| Figure | Mail.cx | TempMaily |
|---|---|---|
| Price from | $0.82/mo | $7.50/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · Temporary email services | 9.1 (#4) | 8.4 (#11) |
| Spec score · Temporary Email Services | 8.9 (#6) | 7.7 (#20) |
| Custom domains | Pro users can connect up to 100 custom domains using DNS verification. | Premium lets users connect a custom domain and use dedicated premium domains, with up to 10 addresses at once. |
| Product | Mail.cx provides short-lived inboxes, email receiving, API access, and real-time mailbox events for developer workflows. | TempMaily provides disposable email inboxes for receiving verification codes and signup mail. |
| Real-time delivery | Server-sent events push newly received messages to the browser immediately. | Messages are delivered to the browser as they arrive. |
| Receive-only | The service receives email but does not provide email-sending functionality. | Mailboxes are receive-only and cannot send email. |
| Security | Mail.cx says connections use TLS, passwords are hashed with bcrypt, and API tokens are stored as SHA-256 hashes. | The service uses HTTPS, sanitizes incoming HTML mail, renders it in a sandboxed iframe with scripts disabled, and blocks remote images by default. |
| Support | The contact page says support normally responds within two business days and prioritizes security and abuse reports. | Premium includes premium support; abuse reports can be sent to [email protected] for human review. |
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.
TempMaily
TempMaily provides disposable email inboxes for receiving verification codes and signup mail through web and API access. Its free inbox is created without signup, a password, or personal details, and messages appear in the browser as they arrive. Mailboxes are receive-only, so they cannot send email, although incoming messages can include attachments. The free plan permits one shared-domain address at a time; the inbox and its messages are permanently deleted 24 hours after creation, with transient storage and ads. Premium supports up to 10 addresses, custom and dedicated domains, long-term or permanent addresses, and 2GB of email storage. It also adds a REST API and MCP server for programmatic inbox creation and message reading. The MCP server works with Claude Desktop, Claude Code, Cursor, and MCP-capable agent frameworks. Premium costs $7.50 a year when billed annually ($90/year), or $9.90 a month. HTTPS, HTML sanitization, sandboxed rendering, disabled scripts, and blocked remote images are listed protections.