The best alternatives to Kaashi are Uforio, Readder, and The Unim.press. 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
We call Reddit.com the "front page of the Internet," but it occurred to me that that's only true in a very abstract sense. So I thought I'd extend that metaphor to something concrete! Unim.press is a Reddit reader/browser that looks like the NYT front page.
PhonePrivacy is privacy-centric Google Voice alternative which allows for multiple phone numbers as well. I built PhonePrivacy because I was frustrated by having multiple email addresses but only one phone number. Once my phone number was out, anyone could contact me. PhonePrivacy lets you buy numbers and use them like you would any other.