The best alternatives to quack.space are Jumpshare, Envelop, and Poetic.io. If these 3 options don't work for you, we've listed a few more alternatives below.
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Universal-2 by AssemblyAI— Speech-to-Text API for conversational data
Share unlimited files, screenshots, video recordings with your team and clients, upload & collaborate in real-time, preview 200+ file formats online - all for free!
Salad Room is a web app to share text, links or files quickly between devices. Magically connecting them on the same network. Like AirDrop, but for everyone.