What is Posthawk used for?

Posthawk is an email API for developers whose SDK relies on plain fetch, so it runs on Cloudflare Workers and Vercel, and which can also be self-hosted as open source. It is a good fit for sending transactional email from Next.js routes, parsing inbound support emails into a ticket flow and running email infrastructure on your own servers.

Yes. Posthawk has a free plan, and paid plans start at $20 per month.

Is Posthawk open source?

No. Posthawk is proprietary (closed-source) software. In the Email Marketing category, open-source options include Postal, Plunk and Dittofeed.

Can I self-host Posthawk?

Yes. Although Posthawk is closed source, it can be self-hosted on your own servers, and the vendor also offers a hosted version.

What are some alternatives to Posthawk?

Posthawk competes with Resend, Postmark and SendGrid.

Posthawk: features, pricing and alternatives

About Posthawk

Posthawk is an email layer for developers that handles transactional email, scheduled sending and inbound processing. A fetch-based SDK runs in any edge runtime, including Next.js, Vercel and Cloudflare Workers, and quickstarts exist for Node.js, Python, Go, REST, SMTP and a CLI. Domain management generates SPF, DKIM, DMARC and MAIL FROM records automatically, and templates are built on React Email with dynamic variables.

Emails can be scheduled for later and modified or canceled before they are sent, and incoming mail is parsed into webhooks with attachments and headers. Posthawk can run managed in US or EU regions or run on your own servers using one Docker command, and it offers an MCP server for Cursor, Claude Code and Windsurf. The free cloud plan includes 3,000 emails a month, 100 a day, one domain and two API keys, with overage at $0.60 per 1,000 emails.

Key features

REST API and fetch-based SDK for edge runtimes
Scheduled sending that can be canceled
Inbound email parsing through webhooks
React Email templates with variables
Automatic SPF, DKIM and DMARC records
Self-host with one Docker command

Good fit for

Sending transactional email from Next.js routes
Parsing inbound support emails into a ticket flow
Running email infrastructure on your own servers

Tags: email-api; transactional-email; edge; self-hosted; developer-tools; mcp; webhooks; docker

Posthawk: questions and answers

What is Posthawk used for?: Posthawk is an email API for developers whose SDK relies on plain fetch, so it runs on Cloudflare Workers and Vercel, and which can also be self-hosted as open source. It is a good fit for sending transactional email from Next.js routes, parsing inbound support emails into a ticket flow and running email infrastructure on your own servers.
Is Posthawk free?: Yes. Posthawk has a free plan, and paid plans start at $20 per month.
Is Posthawk open source?: No. Posthawk is proprietary (closed-source) software. In the Email Marketing category, open-source options include Postal, Plunk and Dittofeed.
Can I self-host Posthawk?: Yes. Although Posthawk is closed source, it can be self-hosted on your own servers, and the vendor also offers a hosted version.
What are some alternatives to Posthawk?: Posthawk competes with Resend, Postmark and SendGrid.