PostStack icon
PostStack icon

PostStack

PostStack is a developer-first transactional email API for European teams. Send via REST or SMTP, host IMAP/POP3 mailboxes on your own domains, and run broadcasts — all from EU infrastructure with transparent pricing from €5/mo.

PostStack screenshot 1

Cost / License

  • Freemium (Subscription)
  • Proprietary

Platforms

  • Online
  • Software as a Service (SaaS)
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Features

  1.  IMAP Support
  2.  SMTP Support
  3.  GDPR Compliant
  4.  Model Context Protocol (MCP) Support
  5.  Email api
  6.  Transactional Email

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PostStack information

  • Developed by

    DK flagMICCI

  • Licensing

    Proprietary and Freemium product.

  • Pricing

    Subscription that costs up to $65 per month + free version with limited functionality.

  • Alternatives

    0 alternatives listed

  • Supported Languages

    • English
PostStack was added to AlternativeTo by miccidk on and this page was last updated .
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What is PostStack?

PostStack is a transactional email platform built in Denmark and hosted in Finland. It offers a typed REST API, SDKs for TypeScript, Python and Go, an MCP server for AI agents, and SMTP relay — plus Dovecot-backed IMAP/POP3 mailboxes and webmail on every domain you own. Deliverability is handled by Postfix with RFC 8058 one-click unsubscribe, DMARC aggregate reporting, Rspamd pre-flight scoring, and DKIM/SPF auto-setup. Plans start free (3,000 emails/month) then €5/mo for 10,000 — up to 72% cheaper than Resend, with EU data residency by default.

Official Links