Delta DNA is a good alternative with amplitude and Firebase. It's focused on game developers and contains events and parameters focused on games. There is a trial for DDNA for 30 days which developers can try out to experiment with the features. Apart from basic events analysis DDNA also provides A/B testing and segmentation for users. The dashboard is still comprehensive with data for quick view. DDNA also provides segmentation for test users, paying users, or anything specific for targeting. Unity support is a big plus. Documentation is comprehensive and easy to navigate with screenshots and code based references which is easy to follow.

The Software Development Kit is the most versatile one I've used in a long time and it's very interactive and easy to implement. The Real-time information exchange is also top-notch and user friendly

Players are engaged in the way they want real-time, live or personal. Games can send information to DeltaDNA and generate insights, information from it. The SDK is straightforward to implement.