Firebase Cloud Messaging vs Notifiers: What are the differences?
Firebase Cloud Messaging: A cross-platform messaging solution. It is a cross-platform messaging solution that lets you reliably deliver messages at no cost. You can notify a client app that new email or other data is available to sync. You can send notification messages to drive user re-engagement and retention. For use cases such as instant messaging, a message can transfer a payload of up to 4KB to a client app; Notifiers: An easy way to send notifications. A one stop shop for all notification providers with a unified and simple interface.
Firebase Cloud Messaging and Notifiers belong to "Mobile Push Messaging" category of the tech stack.
Notifiers is an open source tool with 1.2K GitHub stars and 41 GitHub forks. Here's a link to Notifiers's open source repository on GitHub.