Syren is a beta feature. Review your video, including avatars and audio, before you share it.
📌 Syren Availability by Plan
Basic: Videos include a watermark. Download and sharing are enabled for the first 2 weeks.
Starter and Pro: Videos have no watermark and you can download and share them.
Enterprise: Available to every organization. Users need a full license to use Syren.
If you would like to upgrade your plan, use our upgrade guide.
What is Syren?
Syren is a new way to create videos in Synthesia. You describe the video you want, and an AI agent builds the video and shows you a live preview as it works. You can add your own files and links, and then refine the video through chat instead of building each scene by hand. Syren works well for launch videos, explainers, product how-tos, and marketing content.
Before You Start
Before you start a video with Syren, check these limits:
You can start from scratch or from an example video. If you start from scratch, you choose a size before you send your prompt: Wide 16:9 (landscape) or Tall 9:16 (portrait). If you start from an example video, you cannot choose a size.
Syren uses credits as you create and refine your video. Your usage appears as Syren usage.
✍️The length of video you can create in Syren is dependant on your plan:
All paid plan users have the option to build videos up to 60 mins
Basic plan users have a 3 minute limit for Syren videos.
Create a Video With Syren
To create a video with Syren:
In the navigation menu, under Tools, select Syren.
Choose a video shape or an example video:
Choose a shape from the aspect ratio dropdown in the prompt box: Wide 16:9 (selected by default) or Tall 9:16.
Or select an example video in the Quick start, Explore, or My videos tab.
If you use an example video, you cannot choose a shape.
Describe the video you want in the prompt box.
Include details such as audience, tone, visual style, narration, and music.
For example: "Create a 30-second social media ad explaining Synthesia to marketing professionals interested in video."
(Optional) Select + in the prompt box to add supporting material to your prompt:
Documents
Images
Videos
PowerPoint files
Select Send.
✍️ For any video over 15 minutes, Syren will ask the creator to confirm if they are happy to continue in the creation process.
Review your video
After you select Send, Syren builds your video and shows you a live preview. To review, refine, and share your video:
Answer any question Syren asks.
For example, Syren can ask who the video is for and offer answer options. Choose an answer, and Syren continues building your video.
Watch the live preview as Syren builds your video.
The Chat panel shows each stage of the build.
Select Stop to stop Syren while it works.
Wait until Syren finishes generating before you play the video. A video played during generation can sound garbled or silent.
For shorter prompts, Syren offer 3 creative directions that you can select before generation.
Refine your video
Refine the video through chat. For example, ask Syren to:
Change the script
Swap the avatar or voice
Restyle a scene
Fix the music, shot types, aspect ratio, or pronunciation
Every chat message goes with the playhead position and the element you selected. Drag the playhead or select a moment in the scenes to show Syren which moment you mean.
(Optional) Edit an element on the picture without waiting for Syren:
Select an element, such as a heading, an image, or a shape.
Select the sparkle icon on the selected element, and then type an instruction, such as "make this bigger" or "fade this in at 2s". The instruction applies to the element you selected.
Download your video to begin rendering it.
Share Your Video
To Share your video:
Select Share.
Select Publish. You must publish first to choose who can watch.
Choose who can watch:
Anyone with the link
Require SSO to watch,
Protect with password, or Request email.
Select Copy link to share, once the video is published.
💡 Undo and redo reverse every change, yours and Syren's. Select the undo or redo button, or press ⌘Z on a Mac.
Tips and Known Limitations
💡 Start with a simple prompt, and then refine your video in chat. Very long prompts can fail to generate.
These tips and known limitations help you get better results from Syren.
Interactive avatars and live conversations are not available in Syren.
Avatar scenes longer than 30 seconds can time out.
Syren mixes the first 24 audio tracks into your exported video. Any extra voiceover or sound effects are dropped. Mute the tracks you don't need.
Exports can take some time to finish.
If the chat disconnects, reload the page and type "continue" to ask Syren to resume.
Use only files, links, logos, and brand assets you have the right to use.
💬 FAQs
Can I use my Personal Avatars in Syren?
Can I use my Personal Avatars in Syren?
Currently you are only able to use the stock Express-2 and Express-3 Avatar made with Avatar Builder in your Syren videos.
Am I able to use Syren on mobile devices?
Am I able to use Syren on mobile devices?
Yes Syren is available for all users to test on mobile devices.
When should I use Syren instead of Assistant?
When should I use Syren instead of Assistant?
Syren works best for fast, creative videos such as launch videos, explainers, and marketing content. Assistant and the Synthesia editor work best when your video needs an exact script, precise scene control, or regular updates and translations, such as training, compliance, and onboarding content.
Which plans include Syren?
Which plans include Syren?
Syren is available on the Basic, Starter, Pro, and Enterprise plans. On the Basic plan Syren videos include a watermark.
Does Syren use credits?
Does Syren use credits?
Yes, Syren uses credits as it builds your video and for every round of chat edits. Each user starts with free Syren launch credits. After launch credits run out or expire on November 9, Syren uses the standard credits in your account
How long can a Syren video be?
How long can a Syren video be?
A Syren video can be up to 3 minutes on Basic plans, all our paid plan users can create a Syren video up to 60 minutes in duration.
What happens if I run out of credits using Syren?
What happens if I run out of credits using Syren?
If you are a self-serve user, you will get a prompt on screen letting you know you are out of credits and how you can upgrade.
What's Next?
📚 To learn more, check out How do Syren credits work?
📚 Before you publish, review Synthesia Video Licensing.
📚 For other ways to start a video, visit Video Creation – Synthesia Docs.