InAppStory - Engage your customers with Stories right from your app or mobile web product with InAppStory.
YEAY - QVC + Tumblr + Snapchat. Vertical video shopping.
Storyly - Bring superb stories to your app
StoriesAds.com - Make Instagram Stories Ads for your brand by Shakr & HubSpot
to Stories - Create stories from website link, podcast, YouTube, tweet, quote, text, photo or video
Animaker - Animaker is an online do-it-yourself (#DIY) animation video maker that brings studio quality presentations within everyone's reach. Animated Videos, Done Right!