Comparison
InstantPWA vs Firebase Cloud Messaging (web push)
Free push infrastructure, or the install layer above it?
FCM is a raw web-push transport — free, powerful, and requires you to build the UI, subscribe flow, and analytics. InstantPWA gives you the install-and-subscribe UI, dashboard and analytics on top; FCM can still be the transport underneath.
Install popup UI
InstantPWA
Yes
Firebase Cloud Messaging (web push)
No
iOS Safari install guide
InstantPWA
Yes
Firebase Cloud Messaging (web push)
No
Analytics dashboard
InstantPWA
Yes
Firebase Cloud Messaging (web push)
No
Raw push transport
InstantPWA
Basic
Firebase Cloud Messaging (web push)
Yes
Free
InstantPWA
Generous
Firebase Cloud Messaging (web push)
Yes
When to pick which
Use FCM alone if you have engineers happy to build the whole install/subscribe UX. Use InstantPWA when you want a working install and push prompt in an hour.