Postmark alternatives · Email Sending
Self-hosted alternatives to Postmark
The Postmark listing does not say it can be self-hosted. 7 of the 50 other email sending services in this directory can be self-hosted, according to their own sites.
Postmark has a free plan. Paid plans start at $15 per month for 10,000 emails. 5 of them are free or have a free plan.
7 tools · Listings checked up to Nov 13, 2026 · Where the facts come from
How each one differs from Postmark
- Free trial · from $199/mo
EmailEngine
Self-hosted REST API for Gmail, Microsoft 365 and IMAP mailboxes
- EmailEngine starts at $199 per month, or $1,450 per year (€169 or €1,200). Postmark starts at $15 per month for 10,000 emails.
- Postmark has a free plan. EmailEngine does not, though it has a free trial.
- EmailEngine is self-hostable, according to its own site.
- Postmark also covers dMARC.
- Free plan · from $3/mo
Forward Email
Open-source email forwarding and hosting for custom domains
- Forward Email starts at $3 per month for unlimited domains. Postmark starts at $15 per month for 10,000 emails.
- Only Forward Email lists macOS, Windows, Linux, iOS and Android apps.
- Forward Email is open source and self-hostable, according to its own site.
- Postmark also covers dMARC and transactional email.
- Free plan · from €10,000/yr
Hyvor Relay
Open-source email API you can self-host
- Hyvor Relay starts at €10,000 per year and up (Enterprise License). Postmark starts at $15 per month for 10,000 emails.
- Hyvor Relay is open source and self-hostable, according to its own site.
- Postmark also covers dMARC.
- Free trial · from €10,000 one-time
MailerQ
Self-hosted mail transfer agent for high-volume email sending
- MailerQ starts at €10,000 one-time per instance, plus €2,000 a year for updates and support. Postmark starts at $15 per month for 10,000 emails.
- Postmark has a free plan. MailerQ does not, though it has a free trial.
- MailerQ is self-hostable, according to its own site.
- MailerQ also covers inbox warm-up.
- Free plan · from $10/mo
useSend
Open-source email sender built on Amazon SES
- useSend starts at $10 per month, then pay as you go. Postmark starts at $15 per month for 10,000 emails.
- useSend is open source and self-hostable, according to its own site.
- useSend also covers email campaigns.
- Postmark also covers dMARC.
- Free plan · from $0.001
Plunk
Open-source email platform for transactional and marketing mail
- Plunk starts at $0.001 per email sent. Postmark starts at $15 per month for 10,000 emails.
- Plunk is open source and self-hostable, according to its own site.
- Plunk also covers workflow automation and email campaigns.
- Postmark also covers dMARC.
- Free plan · from $5,000/yr
KumoMTA
Open-source mail server for high-volume, self-run email sending
- KumoMTA starts at $5,000 per billion messages per year for Silver support. Postmark starts at $15 per month for 10,000 emails.
- Only KumoMTA lists a Linux app.
- Only Postmark lists a web app.
- KumoMTA is open source and self-hostable, according to its own site.
Common questions
Is there a self-hosted alternative to Postmark?
Yes. EmailEngine, Forward Email, Hyvor Relay, MailerQ, useSend, Plunk and KumoMTA can be self-hosted, according to their own sites.
Can Postmark be self-hosted?
The Postmark listing does not say it can be self-hosted. The listing was checked on Oct 18, 2026 against the pages it cites.
Which of these email sending services are free?
Forward Email, Hyvor Relay, useSend, Plunk and KumoMTA are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 18, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Postmark: the alternatives its listing names first, then the tools that share the most features with it.