Tipeeestream

It is possible to set more noticeable alerts for a higher amount of donation, or if someone subscribes using the higher sub tier available on Twitch.

TipeeeStream works with not only Twitch, but also YouTube, Mixer, Smash Cast, and DailyMotion.

All of this makes it a suitable alternative if you intend to stream across different platforms.

TipeeeStream also has deeper integration with Elgato, and specifically its Elgato Stream Deck device.

Because of this TipeeeStream Twitch alerts might be an excellent choice if you already have the deck from Elgato.