Castfy is the AI recording app for every step from url to demo
Requires: Claude Code, Codex, or Cursor CLI
How it works
Step
01
Paste a URL and say what to show
Two fields. No script, no storyboard, no take.
Step
02
Your agent runs it
Castfy hands the job to Claude Code, Codex or Cursor, headless. A real browser opens on your machine and works through the flow.
Step
03
Edit and export
The dead time is already cut and the narration is written. Pick a background, set the ratio, export to your disk.
Features
It never leaves your machine
The browser, the recording, the render and the export all run locally. Nothing is uploaded anywhere.
It reaches what cloud tools can't
A hosted browser cannot open localhost:3000 on your laptop. This one is already there.
You describe it. Nobody records it.
A URL and a sentence. No re-recording yourself because you said "um" at 0:14.
Re-run it when the UI moves
The demo is a prompt, not footage. Ship a redesign, run the same job again.
The cuts are yours to overrule
One 88-second recording became 10 seconds of video. Every cut is still editable.
214 gradients, 19 overlays, 25 formats
214 gradients, 90 backgrounds, your own images, 19 shadow overlays, 25 aspect ratios.
Coming soon: automatic zoom and pan that follows the cursor.
The numbers. Even the ugly one.
Seven recordings, measured on disk. The compression is real and so is the spread.
| Recording | Raw | Finished |
|---|---|---|
| Onboarding flow | 396 s | 8.2 s |
| Pricing walkthrough | 244 s | 6.3 s |
| castfy.app tour | 87.6 s | 9.9 s |
| Short settings demo | 25.3 s | 23.4 s |
That last row is a demo with almost no dead time in it, so almost nothing came out. A tool that only ever showed you the 48x result would be showing you the best day.
The castfy.app tour ran on a Claude subscription, so it cost nothing beyond the plan. Priced at API rates instead, the same run would have been about $1.00.
Join the waitlistOnly One purchase.
The render happens on your machine and the model cost is billed to your own model provider.
Try it
No watermark, no card, no account, no expiry.
5 demos, free
The full app, every feature
1080p export with no watermark
Runs on the agent subscription you already pay for
No API key to add, no usage bill from me
Castfy
One time. $99 for the waitlist, $149 after launch.
$99$149one time, not per month
Unlimited demos
Everything in the free tier, without the limit
Re-run any flow when your UI changes
A year of updates, and the version you bought keeps working forever
First 100 buyers get updates for life
Recordings run on your own Claude, Codex or Cursor subscription. A demo spends quota you already pay for, not money.
Get launch pricingDemosmith's Pro plan is $99 a month. This is $99.
Against a hosted demo tool
The other tools in this category are good. They all run your product on their infrastructure, which decides what they can and cannot reach.
| Cloud demo tools | Castfy | |
|---|---|---|
| Where your product runs | Their browser, their infrastructure | Your machine |
| Can it reach localhost | No | Yes |
| Staging behind a login | Hand over access | Already inside |
| Price | $27–250 a month | $99 once |