Features and services  Truepush OneSignal
Unlimited Web Notification
Unlimited Mobile Notification
Unlimited Subscribers – Web Free up to 10,000 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 Through Zapier integration