BTW, I just stumbled across the AWS Chime SDK: https://aws.amazon.com/blogs/business-productivity/customers-like-slack-choose-the-amazon-chime-sdk-for-real-tim

BTW, I just stumbled across the AWS Chime SDK: https://aws.amazon.com/blogs/business-productivity/customers-like-slack-choose-the-amazon-chime-sdk-for-real-time-communications/ https://aws.amazon.com/blogs/business-productivity/customers... Sounds similar to what Twilio offers, but at about 1/6th the price -- might be worth a look if costs are a concern...