The best alternatives to Envision are Prisma, Pikazo, and Deepart.io. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Beem is a mobile app that enables pre-recorded and livestream communication in Augmented Reality. With Beem, anyone can produce filmed content featuring themselves as holograms which their friends, contacts and audiences can watch, just by clicking a link.