diff --git a/README.md b/README.md
index 7e6b82a0..791198dd 100644
--- a/README.md
+++ b/README.md
@@ -370,6 +370,7 @@ Table of Contents
   * [elasticemail.com](https://elasticemail.com) — 100 free emails/day. 1,000 emails for $0.09 through API (pay as you go).
   * [mail-tester.com](https://www.mail-tester.com) — Test if email's dns/spf/dkim/dmarc settings are correct, 20 free/month
   * [migadu.com](https://www.migadu.com/) — Email Hosting (Webmail, SMTP, IMAP, ...) — free plan is limited to 10 outgoing mails/day
+  * [socketlabs.com](https://www.socketlabs.com) - 40k emails free for first month, then first 2000 emails/month free
 
 ## CDN and Protection