The colyap blog

Notes from building colyap

Why voice beats another app, how a phone-native agent scales, and what it actually does under the hood.

Person relaxing on a couch at golden hour, talking on the phone

Jul 16, 2026 · 6 min read

why you'd want someone to yap to

the case for an assistant with a phone number instead of an app icon, and why yapping beats prompting.

Vintage telephone exchange switchboard with hundreds of glowing cables

Jul 16, 2026 · 8 min read

how colyap scales to a million users

back-of-the-envelope math, a speech-native pipeline instead of a three-model relay, and the system design for answering in 800ms.

Person walking through a city street at dusk on a phone call

Jul 16, 2026 · 7 min read

what makes colyap different

speech to speech, iMessage, connected apps, tasks that outlive the call, memory, and scheduling, all in one phone number.