I agree multiple solutions are needed to run a practice. TigerConnect is a very reputable platform, but it is not geared towards private practice. They charge $100 a month, and there primary focus seems to be large health organizations.
I have been using a texting solution that also offers a one-way email and fax called BloomText.  https://www.bloomtext.com/#/
It’s $10 a month. What stands out in BloomText is that patients do not have to download an app. Text messages are delivered as normal but with a link to a HIPAA complaint chat. My patients have been receptive to using this instead of traditional text communication.