The best alternatives to Swiffy Slider are QGraph, OneSignal, and Contentdrips. If these 3 options don't work for you, we've listed a few more alternatives below.
OneSignal is the market-leading customer messaging and engagement solution, offering mobile and web push notifications, in-app messaging, SMS, and email. Our powerful omnichannel platform enables 1M+ businesses to deliver over 10B+ messages daily. Powered by superior architecture, OneSignal is designed to scale with your business and deliver messages more quickly and reliably than the competition.