Synthesia's AI video agent that builds on-brand videos from a prompt
Syren is an AI video agent inside Synthesia, launched in beta on October 7, 2026. Users describe a video or share documents, images, videos, PowerPoints or YouTube links, and Syren writes the video as code and renders it live with motion graphics, 3D, avatars, voiceover, music and b-roll, then refines it through chat. It can learn a brand's visual style from existing videos, makes videos up to three minutes long in wide or tall formats, and uses credits on Synthesia's free, Starter, Pro and Enterprise plans.