Hi Product Hunt! 👋 I'm Mario, founder of Mountain.ai and creator of KOECALL.ai. The problem: Over 1 in 3 elderly people experience chronic loneliness. Most AI companions require a smartphone, an app, or a screen — exactly what this population doesn't have or doesn't want. What we built: KOECALL.ai is a voice AI companion you reach with a single phone call. No app. No setup. No friction. Just pick up the phone and talk. Under the hood: GPT-4o Realtime API + Azure Communication Services + Twilio, with localized AI personas (Isabella 🇮🇹, Denise 🇫🇷, Sonia 🇬🇧, Jenny 🇺🇸). Where we are: Live with active phone numbers in 🇮🇹 🇫🇷 🇬🇧 🇺🇸, currently in beta. Early users call daily — not because we ask them to, but because they want to. Why now: GPT-4o Realtime finally makes sub-second voice latency possible at scale. The timing is right. We're actively looking to connect with investors and partners who believe voice AI can close the loneliness gap. Happy to chat — drop a comment or reach me at mario@koecall.ai

koecall.ai

Voice AI companion. No app, no screen, just call

Voice AI companion. No app, no screen, just call