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makecalls
Call the whole world for cents from a browser or a phone, or brief an AI agent to make the call and report back.
[ Overview ]
makecalls puts real phone lines in the browser and in native apps, pay as you go, 240+ countries. On top sits an AI voice agent that dials, waits on hold, navigates menus and hands back a transcript.
[ What we built ]
Web calling app
A dialer in the browser, on any real number.
iOS and Android apps
Native calling with CallKit and ConnectionService.
Telephony backend
Twilio voice, live pricing per destination, numbers in 11 countries.
AI voice agents
Brief it, listen in, steer mid-call, read the transcript.
Payments and credits
Stripe top-ups, in-app billing, every second billed once.
Fraud controls
Survived a live toll-fraud attack without turning calling off.
[ Stack ]
Web
- Next.js 16
- React 19
- Tailwind 4
- Twilio Voice SDK
Mobile
- SwiftUI + CallKit
- Kotlin Compose
- StoreKit / Play Billing
Telephony
- Twilio
- Pricing v2
AI
- Vapi
- GPT-4o mini
Backend
- Supabase
- Stripe
- Resend
- Vercel crons
[ Outcome ]Visit makecalls.online
Live on web, iOS and Android, with an AI agent at base rate plus $0.50 a minute.
240+countries you can call
$0.07per minute to India
3platforms: web, iOS, Android
