title: What is the max topics for Topic Messaging of FCM
body: <p>I am developing an Android app that uses Firebase Cloud Messaging. For the back-end, I am using ASP.NET MVC.</p>
  <p>I am using <a href="https://firebase.google.com/docs/cloud-messaging/android/topic-messaging" rel="nofollow noreferrer">Topics Messaging</a> to push notifications to multiple devices. I will create topics dynamically.</p>
  <p>In my use-case, I dynamically create a topic from admin panel. Then users will subscribe to that topic at the client side (Android). I will push the notifications to the subscribed users of that topics, but my application may have thousands of topics.</p>
  <p>My question is, is there any limitation for the number of topics for Topic Messaging in FCM? It may work during development with few numbers of topics, but I am worried that maybe it may hit a number of topics limitation when my application goes live.</p>