What Is RTSP Streaming and Why It Is Still Relevant in 2026

Real Time Streaming Protocol (RTSP) is a control protocol designed for managing real-time audio and video streams from devices like IP cameras and encoders and remains a critical component in modern streaming workflows. Developed in the late 1990s, RTSP allows for controlled, on-demand delivery of real-time data, providing flexible transport options over TCP and UDP, and is widely used for ingesting video in environments requiring ultra-low latency. Despite its limitations in direct playback support and CDN scalability, RTSP is favored for its simplicity, cross-device compatibility, and low-latency streaming capabilities, making it suitable for various applications including surveillance, drone operations, and robotics. RTSP operates in a client-server model and is often compared with other streaming protocols like RTMP, WebRTC, and SRT, each serving different needs within the streaming pipeline. While RTSP does not include built-in encryption, it can achieve secure transport through additional protocols like RTSPS or SRTP, maintaining its relevance in scenarios where device compatibility and efficient first-mile delivery are crucial.