Overview
Quo is an AI-driven business phone and front-office platform formerly known as OpenPhone. It was founded in 2018 by Mahyar Raissi and Daryna Kulya, went through Y Combinator (Summer 2018), and is based in San Francisco. In late 2025 the company rebranded from OpenPhone to Quo, alongside $105 million in growth financing (largely from General Catalyst's Customer Value Fund) and the launch of Sona, its AI voice agent. The product is trusted by nearly 90,000 businesses and is rated highly for customer satisfaction.
Product and Use
Quo gives teams business phone numbers that work on top of existing devices without a second SIM, with shared numbers, team messaging, call and text from one app, voicemail transcription, and CRM integrations. Its AI capabilities, including the Sona voice agent, help businesses answer calls, capture messages, and avoid losing customers. Quo targets startups, small businesses, and growing teams that want a modern, collaborative phone system with AI handling routine front-office work. Note: the company operates under the Quo brand as of its 2025 rebrand and was previously known as OpenPhone.