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.
BigPicture.io - BigPicture provides company APIs for data-driven B2B teams.
Truepush - Unleash limitless possibilities with Truepush and save up to $600 monthly. Free up to 10K Subscribers on all features.
Adobe Marketing Cloud - End-to-end digital marketing
PushCrew - Push Notifications for Websites
Freeway - With Freeway you can create the website you want without having to write any code! Its easy-to-use design is great for people making their first website or for those with experience looking to make one in a jiffy.