HIPAA compliant texting app for therapists , what are private practices using?

I got that many therapists and small private practices now are relying heavily on text based communication for scheduling, reminders, and patient follow ups. However, HIPAA compliance adds an extra layer of responsibility when choosing communication tools.

Regular texting apps are often not suitable for handling sensitive patient information, which is why many providers look for more structured communication systems designed for healthcare use.

For therapists in private practice, what tools have actually worked well in balancing convenience with compliance? How are others managing patient communication without making the system overly complicated for daily use?