There are a variety of tools you could use to create push notifications.
Here are a few of the best ones to use for your eCommerce store:
VWO - is one of the leading push notification companies and has some chatbot features as well.
Subscribers - a great tool to use for beginners, has a freemium plan, and some advanced eCommerce features like recurring notifications and welcome drip campaigns.
OneSignal - another great free tool that sends mobile push notifications, web, in-app, as well as email notifications.
LeanPlum - a great tool to use for larger businesses and enterprises. It has a ton of features and advanced integrations, A/B testing, reporting, analytics, and an advanced campaign builder.
PushBots - this tool is great for a more advanced marketer and has some of the advanced features for a low price ($29/mo). Features include localization, smart schedule, targeting, and A/B test. It has a unique polls feature that allows you to send out polls to your mobile users.
MobileMonkey - no list would be complete without this tool. This is a great tool for all of your mobile communication. You can use MobileMonkey to set up SMS, chatbots, Facebook Messenger ads, live chat, and push notifications.