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
Monetization


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