Chert
Build AI agents that text customers in iMessage
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Chert - Vapi for FaceTime: AI video agents in a few lines

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Chert is Vapi for FaceTime. Build and deploy interactive AI video agents that can answer and place FaceTime calls with just a few lines of code. Deploy agents for remote support, field service, telehealth intake, guided onboarding, or anything that's easier to show than explain. Try it live: FaceTime an agent right now and show it something.

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This looks like a really practical way to bring AI agents into iMessage workflows. Congrats on the launch!

Maker

 Thank you!!

Choosing FaceTime as the surface is the part I keep thinking about. Most voice agents ship on a phone number or an in-app widget, and both carry a tax: the number reads as spam, the widget needs a download.

I build voice AI that calls aging parents at Callie Care, and the constraint that governs everything is that the person on the other end will not install anything or learn a new interface. FaceTime is one of the few places where that is already solved, so the "sees what the user shows their camera" part is more interesting to me than the code-in-a-few-lines part. Half of what an adult child asks over the phone is really "show me the pill bottle."

Gary, two questions. On an agent-placed call, what does it look like on the recipient's lock screen, a normal contact or something visibly automated? And where does your round trip latency land on a live call, since past roughly 800ms people start talking over the agent and the whole illusion drops.

Maker

 I completely agree! A phone number reads as spam, a widget needs a download, and FaceTime skips both. That's why we started there.

Regarding your two questions:

  1. Lock screen: It appears as a normal FaceTime call from the Apple Account/phone identity. If saved, the recipient sees the contact name/photo. Otherwise, just the identifier.

  2. Latency: We offer realtime speech-to-speech right now through OpenAI Realtime and LiveKit. This lets us achieve sub 800ms latency.

Elder care is one of the use cases we're most excited about, and I'd love to have a longer conversation about this. Here's my calendar:

voice agents are blind is a great line 😄 telehealth intake feels like the killer one

Maker

 Yes, thank you!

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