Self-hosted newsletter and mailing list manager shipped as a single Go binary, with a Postgres store and SMTP-agnostic sending.
You pay for Mailchimp
There is an open source for Mailchimp
1 reviewed open source alternative to Mailchimp so far. More in review.
"I've been using Listmonk (very easy to customize), sending ~35,000 mails / weekly as an alternative to Mailchimp with AWS SES as a backend but a self-hosted stalwart server could do the trick. We're saving ~600$/month by not using Mailchimp."
| Project | License | Stars | Last release | Hosted | Docker | Zero terminal | Install path |
|---|---|---|---|---|---|---|---|
| listmonk | AGPL-3.0 | 22.7k | 2026-06-26 | No | Yes | No | Install path |