How it plugs in
—Public API
NoOpen source
YesFree tier
Signal on Email APIs6.0#15 of 31
MailPace is a transactional email service for sending emails such as password resets, OTP codes, and notifications.

Pricing
- Secret free planContact support to try it · Up to 100 emails/monthFree
- Usage-basedper Month · 10,000 emails · additional emails charged automatically based on usage$10/mo
As mailpace.com lists them, checked 11 Oct 2026.