What most developers (that are considering firebase dynamic links), are looking for right now is

1. Clear & transparent pricing that doesn't scale exponentially as your MAUs grow.
2. A direct drop-in replacement for Firebase Dynamic Links. With No/Minimum code changes.
3. Support for Android/IOS/flutter/ReactNative
4. Support for custom domains.

I would like to invite you to try chottulink.com

It has a generous free tier, and more importantly The pricing doesn't increase exponentially as your MAU increases.