Check the difference between these two push notification services

Features & Services  Truepush OneSignal
Unlimited Web Notification
Unlimited Mobile Notification
Unlimited Subscribers – Web Free up to 30,000 subscribers with unlimited web push notifications. Free up to 10,000 subscribers, limited to 1 free web push notification per 10k subscribers. 
Unlimited Custom Tags
Limited till 10
Templates Limited till 3
Unlimited Segmentation Limited till 6
RSS-to-push(automation) Through Zapier integration

Explore all these features in detail on signup our tool and know Truepush is the best alternative push notification platform for OneSignal.