How many Firebase functions can I have?

Additional quotas for background functions QuotaLimitScopeMax concurrent invocations3,000per functionMax invocation rate1000 per secondper functionMax concurrent event data size10MBper functionMax throughput of incoming events10MB per secondper functionQuotas and limits | Firebase Documentation firebase.google.com › docs › functions › quotas

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Can Firebase be used for chat?

This app will use Firebase Realtime Database to store all chat messages . Before we add data, though, we should make sure that the app is secure and that only authenticated users can post messages. In this step, we will enable Firebase Authentication and configure Realtime Database Security Rules.

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