River
River, founded as DuoHub, builds voice AI agents for businesses.
- Category
- AI and B2B SaaS
- Website
- duohub.ai
What River does
River builds each agent by reading the company's own website, and the agent then answers customers and books appointments over phone and WhatsApp in the caller's own language. Oseh Mathias, Jason Beck and Jennisha Arnanta founded River, took it through Startmate's Summer '25 accelerator, and sell to enterprise real estate companies.
The secret
A company's website already contains everything its phone agent needs to know. Building the agent by reading that site removes the configuration project that normally sits between a business and a working voice system, which is why a conversation is enough to set one up.
Why NZVC invested in River
NZVC invested in River. We file the company under AI and B2B SaaS on the portfolio wall.
We backed River because voice is the channel most businesses still answer by hand, and building an agent from a company's own website removes the setup work that keeps that automation out of reach. Oseh Mathias, Jason Beck and Jennisha Arnanta came through Startmate's Summer '25 accelerator and went straight at enterprise real estate, where the call volume and the language mix are both real. Answering customers and booking appointments over phone and WhatsApp in the caller's own language is a clear, measurable job to do.
