diff --git a/README.md b/README.md
index 67f4fcbc..5b302d7f 100644
--- a/README.md
+++ b/README.md
@@ -552,6 +552,7 @@ Table of Contents
   * [mailjet.com](https://www.mailjet.com/) — 6,000 emails/month free (200 emails daily sending limit)
   * [mailkitchen](https://www.mailkitchen.com/) — Free for life without commitment, 10,000 emails/month, 1,000 emails/day
   * [Mailnesia](https://mailnesia.com) - Free temporary/disposable email, which auto visit registration link.
+  * [mailsac.com](https://mailsac.com) - Free API for temporary email testing, outbound capture, email-to-slack/websocket/webhook (1,500 monthly API limit)
   * [mailtrap.io](https://mailtrap.io/) — Fake SMTP server for development, free plan with 1 inbox, 50 messages, no team member, 2 emails/second, no forward rules
   * [mail7.io](https://www.mail7.io/) — Free Temp Email Addresses for QA Developers. Create email addresses instantly using Web Interface or API
   * [mohmal.com](https://www.mohmal.com/en) — Disposable temporary email