Founders exploring telemedicine app development like Teladoc Health are stepping into a market worth roughly $123.39 billion in 2026, growing at a 17.27 percent CAGR through 2034, per Fortune Business Insights. A lot of that growth comes down to what Teladoc got right from the start, quick bookings, video calls that hold up, and a system doctors actually trust for ongoing patient care, not just the occasional one-off visit.