OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
Pusher Beams - Send push notifications programmatically at scale
ZoPush - Personalized Browser Push Notifications for Web and Mobile.
Truepush - Unleash limitless possibilities with Truepush and save up to $600 monthly. Free up to 10K Subscribers on all features.
Batch - Batch is an intelligent push notifications platform for mobile apps.
PushOwl - Re-engage website visitors with push notifications