Email and newsletters

SMTPfast alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

Notifuse/notifuse2,051AGPL-3.0Self-hosted newsletter, transactional email platform with visual editor, templating, and multiple sending providers.Open on GitHub Billionmail/BillionMail15,427AGPL-3.0Open-source self-hosted mail server and email marketing platform for sending newsletters and transactional email.Open on GitHub

What you give up either way

Hosted MCP server, OpenAPI/Claude skill conveniences for agent integrations
Turnkey deliverability tooling and any carrier-specific optimizations
Dedicated support, SLA and priority queue from the vendor
Prebuilt broadcast UI with contact-segmentation and double-opt-in flows

An open-source project doing the core job proves a replacement is possible. It does not prove it matches SMTPfast, and it does not prove anyone has run it for a month. How we decide.