Listmonk

Listmonk is a single-binary, high-performance newsletter manager written in Go. Bring your own SMTP. Excellent for technical operators who want full control.

Judged purely as an API. What the request contract guarantees on retry, how complete the webhook event coverage is, whether suppressions are readable and writable programmatically, and how much the message log retains when something needs debugging in production.

Against high-frequency programmatic sends where a missed delivery is a product failure, Listmonk covers webhook coverage, event stream, the suppressions API, and batch sending, and does not cover idempotency keys and SDK breadth. Whether that gap matters depends on how central those are to the build.

• Idempotency keys: No
• Webhooks: Yes
• Event stream: Yes
• Operating since: Not published
• Suppressions API: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Batch sending: Yes
• SDKs: None
• Deliverability: Inherits the deliverability of whichever SMTP relay you point it at.

Inherits the deliverability of whichever SMTP relay you point it at.

Technical operators who want a self-hosted newsletter platform.