Koalendar is a low-cost Calendly-style scheduling tool with a genuinely usable free-forever plan (unlimited bookings and scheduling pages, two-way calendar sync). Its paid Pro plan adds payments, SMS reminders, and HIPAA Business Associate support, making it one of the cheaper routes to compliant standalone scheduling for therapists who only need clean booking rather than a full practice platform. Confirm the current BAA terms directly before transmitting client PHI.


