Synthesia launches Syren, an AI agent that builds video from one prompt
Synthesia has launched Syren in beta, an AI video creation tool that builds a finished video from a prompt, a preset or existing branded material. According to the company, the AI agent does not assist the editor but is the editor.
- Synthesia launched Syren in beta, an AI agent that builds video from a prompt, preset or branded material.
- Videos include motion graphics, avatars, voiceover, music and b-roll, run up to three minutes, and can be horizontal or vertical.
- Syren runs on an in-house rendering engine that has powered motion graphics in Synthesia since June.
- It is available to self-serve, free and all Enterprise customers, is credit-based, and admins can switch it off.
- Synthesia says Syren will soon learn a company's brand from its existing videos.
What Syren does
Syren is described by Synthesia as its video creation tool for fast, creative enterprise video, such as launch videos, explainers and marketing content. Users describe the video they want, or share material they already have, and Syren builds a video with motion graphics, animation, avatars, voiceover, music and b-roll. The video is then refined in a chat.
Inputs can include a prompt or a preset, as well as branded documents, images, videos, PowerPoints or YouTube links. According to Synthesia, the agent writes the whole video as code, and the rendering engine plays it back live, so users can watch the video take shape as it is built.
Peter Hill, Synthesia's Chief Technology Officer, frames the launch as part of a wider shift to AI agents, where people describe what they want instead of operating software step by step.
Editor, rendering and brand control
Syren comes with a new editor that offers playback, a transcript view and chat-based editing. Users ask for a change rather than starting over. Videos render in the browser inside Synthesia, with nothing to install. They can run up to three minutes and be horizontal or vertical.
To steer the look, users can provide brand assets, a video whose style Syren should match, or a description of their brand.
Syren runs on a video rendering engine that Synthesia built in-house. According to the company, that engine has been powering motion graphics inside Synthesia since June, and Syren is the creation experience built on top of it.
Synthesia also says Syren will soon learn a company's brand from its existing videos. It is meant to capture graphics and motion style, pacing and the rhythm of edits, so that every video follows the brand automatically.
Where it fits and how to get it
Syren joins Roleplays, Surveys and the Synthesia editor as part of the Synthesia platform. The company positions it for speed and creative output, while the editor remains the place for content that has to be exact and repeatable: learning content, compliance training, onboarding and internal communications.
The beta is available to self-serve, free and all Enterprise customers through a Syren button in the left-hand navigation of Synthesia. Syren is credit-based, and launch credits let every customer create a first video. Enterprise admins can switch it off at organisation level.
For teams that already use Synthesia, the split is clear: Syren is aimed at quick, creative pieces such as marketing clips, while exact and repeatable material stays in the existing editor. The source does not give pricing details beyond the credit-based model.
Synthesia: Syren by Synthesia: Create Video from a Single Prompt
