Alternatives to Piloxa
Piloxa: Send a certified letter, keep the records. 8 products similar to Piloxa, compared on pricing, free tier, API, MCP server, SDK and open source. 5 of 8 have a free tier, 8 of 8 have an API, 6 of 8 offer an MCP server.
- Poofbox
Disposable, receive-only email inboxes for AI agents, accessible via an MCP server with OAuth.
- PostalForm
Mail API and remote MCP server for sending PDFs, letters, and forms as physical postal mail
- emailvalidation.io
Free email checker and validator: verify any email address with syntax, MX record and live mailbox checks, validate lists in bulk or use the API.
- Mailsac
Disposable test email addresses for QA and developers
- Ausca
Pay-per-call APIs and MCP services for agents
- Mailbox MCP
Remote MCP server that connects an existing Gmail, Outlook, Microsoft 365 or IMAP mailbox to Claude, ChatGPT or any MCP client for reading, searching, sending and filing email.
- EmailGuard API
Developer API for email validation: checks live MX records, blocks disposable emails, and autocorrects typos.
- EmailOctopus
Email marketing platform for managing and emailing subscribers
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| Piloxa | Usage-based · from $9.95 (first letter); $12.97 per one-page letter | no | yes | yes | — | no |
| Poofbox | Paid · from €3.99/month (+ VAT) | no | yes | yes | no | no |
| PostalForm | Usage-based · from $3.40 | no | yes | yes | no | no |
| emailvalidation.io | Freemium | yes | yes | yes | yes | no |
| Mailsac | Freemium · from 0 | yes | yes | yes | yes | no |
| Ausca | Usage-based | — | yes | yes | yes | — |
| Mailbox MCP | Freemium · from £2.92/month per mailbox (paid annually at £34.99 + VAT) | yes | yes | yes | — | no |
| EmailGuard API | Freemium | yes | yes | no | — | — |
| EmailOctopus | Freemium | yes | yes | no | — | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
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