ntfy/docs/privacy.md

Privacy policy

I love free software and I'm doing this because it's fun and to give back. I have no bad intentions and I will never monetize or sell your information. This service will always stay free and open.

Neither the server nor the app record any personal information, or share any of the messages and topics with any outside service. All data is exclusively used to make the service function properly. The one exception is the Firebase Cloud Messaging (FCM) service, which is required to provide instant Android notifications (see FAQ for details).

The web server does not log or otherwise store request paths, remote IP addresses or even topics or messages, aside from a short on-disk cache to support service restarts.