What are some alternatives?
When comparing Roost and Wise Notifications, you can also consider the following products
PushCrew - Push Notifications for Websites
PushAlert - PushAlert allows you to send push notifications to your website subscribers on Chrome, Firefox and Safari. Signup for free and send unlimited notifications.
OneSignal - Customer engagement platform used by 800K+ developers; the fastest and most reliable way to send push notifications.
PushOwl - Re-engage website visitors with push notifications
Pusher Push Notifications API - Send push notifications programmatically at scale
PushEngage - Personalized Browser Push Notifications.