diff --git a/data/category-companies b/data/category-companies
index 6cfb5419..01b1f552 100644
--- a/data/category-companies
+++ b/data/category-companies
@@ -92,6 +92,7 @@ include:westerndigital
 include:wisekey
 include:yahoo
 include:yandex
+include:zscaler
 
 # Remote Control
 include:category-remote-control
diff --git a/data/zscaler b/data/zscaler
new file mode 100644
index 00000000..0f9843b1
--- /dev/null
+++ b/data/zscaler
@@ -0,0 +1,18 @@
+# https://crt.sh/?id=23639384976
+securecloudtransformation.com
+securitypreview.com
+threatlabz.com
+zdxbeta.net
+zdxcloud.net
+zpagov.net
+zpath.com
+zscaler.com
+zscaler.jp
+zscaler.net
+zscalerbeta.net
+zscalergov.net
+zscalerone.net
+zscalershift.com
+zscalerthree.net
+zscalertwo.net
+zscloud.net