Open-source (AGPL-3.0) email platform for developers that combines transactional sending via REST API or SMTP with contacts, segments, campaign broadcasts and automated workflows. Hosted version is pay-as-you-go per email; it can also be self-hosted.
At a glance
- Free tier
- Free plan, 1,000 emails/mo with Plunk branding; free and open source (self-hosted)
- Paid from
- $0.001 per email, pay as you go (no base fee) · pricing page
- Public API
- Yes docs
- MCP server
- Yes · Official @plunk/mcp server in the useplunk/plunk GitHub repo, documented at docs.useplunk.com/guides/mcp-server.
- Best for
- Developers wanting transactional plus broadcast email
- Website
- https://www.useplunk.com/
Plunk pricing
Free plan, 1,000 emails/mo with Plunk branding; free and open source (self-hosted). Paid plans start at $0.001 per email, pay as you go (no base fee). Current numbers live on the Plunk pricing page.
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