Countly (https://count.ly https://count.ly) is open source, push notifications, analytics, A/B testing, performance management and deployable on-prem. You can a

Countly (https://count.ly https://count.ly) is open source, push notifications, analytics, A/B testing, performance management and deployable on-prem. You can also install a limited, free-to-use version on Digital Ocean also.