diff --git a/README.md b/README.md
index 82fb17c..dd40077 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,7 @@ Gathering information for a centralized open data live traffic platform.
 ## sources
 
 - https://autobahn.api.bund.dev
+
+## alternatives
+
+- https://github.com/opentraffic/otv2-platform (https://opentraffic.io/) abandoned?