diff --git a/README.md b/README.md
index b563a527..6f960d23 100644
--- a/README.md
+++ b/README.md
@@ -327,6 +327,7 @@ Table of Contents
   * [assertible.com](https://assertible.com) — Automated API testing and monitoring. Free plans for teams and individuals.
   * [opsgenie.com](https://www.opsgenie.com/) — Powerful alerting and on-call management for operating always-on services. Free up to 5 users.
   * [paessler.com](https://www.paessler.com/) — Powerful infrastructure and network monitoring solution including alerting, strong visualization capabilities and basic reporting. Free up to 100 sensors.
+  * [pagertree.com](https://pagertree.com/) - Simple interface for alerting and on-call management. Free up to 5 users.
 
 ## Crash and Exception Handling