Your coding agent shipped it. Now Zyng can demo it.
You just shipped, and now you have to show it. A launch, an investor update, a sales follow-up. You're a builder, not a video editor, so point your agent at Zyng. It drives your real app over MCP and narrates the demo. No camera, no editing.
- Launch day
- Investor update
- Sales follow-up
- Changelog
- Onboarding
Free first demos, no card. Or connect your agent.
A real product, recorded by an agent, then directed by Zyng. Tap to unmute.
How the agent loop works
Your agent already knows the app it built. It authors the steps from your own source, so the selectors are real, not pixel-guessing. You stay out of it.
Point it at your app
Give your agent your running app's URL. It reads your source for the real selectors.
It drives every feature
Your agent clicks through each flow over MCP while Zyng records the screen.
Zyng narrates and renders
Zyng writes the voiceover, stitches the clips and scenes, and returns a finished MP4.
On your credits
Passwords resolve on your machine and never reach the agent. One credit is one second of video.
- Mint a token in the studio. It spends the same credits as the web app.
- Your agent authors the Playwright steps from your code.
- Passwords resolve on your machine, never the agent.
Made with Zyng. Literally.
Every video on this page was generated by Zyng, and the one up top was assembled by a coding agent driving a real app. No avatars, no stock footage, no actors. Zyng shows your real product and your real data, the same way every time, so the demo is actually your product.
Your real app
It records the product you built, driven live, not a synthetic avatar reading a script.
Your real data
Drop in a spreadsheet and the charts use your actual numbers, down to the currency.
Deterministic
Same input, same video. When the data changes, render it again. Not a one-shot you can't reproduce.
Ship a change, re-render the demo. Because it's deterministic and agent-driven, your demo stays in sync with the product instead of going stale.
Every clip below is a real Zyng output, nothing edited after. Tap any one for sound.
This pitch, built by an agent
A coding agent drove a real app and assembled the hero up top, end to end.
Product walk-through
Point Zyng at your app; it drives the flow itself, records the screen, and narrates.
On a real, hard product
We pointed Zyng at Lithrim, a clinical-AI verification tool. The agent opened a case, ran the eval, and read the verdict it returned.
Narrated data report
Drop in a spreadsheet and Zyng narrates it with charts, on your actual numbers.
Explainer
App clips, slides, and data mixed into one narrated explainer for onboarding or sales.
Not Synthesia, HeyGen, or Pictory. Those generate talking-head avatars and stock B-roll. Zyng records your real app and your real numbers, deterministically.
No agent? Do it on the web.
Open the studio, describe what you want or drop in a file, and Zyng builds the narrated video. Same engine, no install. It makes a few kinds of video and narrates them all.
Want one for your product? We'll make it.
Drop your email and we'll set up a custom narrated demo of your product, free, while we calibrate Zyng for launch. All we ask back is honest feedback. A handful of spots.
Pricing, based on what you render
Credits are render-minutes of finished video, at one dollar a minute, whether your agent renders it or you do on the web. Load any amount, there's no subscription and nothing gets charged that you didn't ask for.
Your first demos are on us
- About 8 minutes of rendered video, free
- Agent loop and web studio included
- No card to start
- Output carries a “Made with Zyng” watermark
Pay as you go
- Load $10, $20, $50, or any amount
- No watermark
- No subscription
- Credits don’t expire
If you need this for a team or you want higher volume, contact us. You can also read our refund & cancellation policy.
Frequently asked questions
Make the demo you never recorded.
Paste your app's URL and your agent drives the demo. Your first demos are on us, no card.
No coding agent yet? Connect your agent or open the studio.