OpenPhone

Private

Modern business phone system that brings calling, messaging, and a lightweight CRM into one collaborative app. Serves nearly 90,000 businesses from startups to Fortune 500 companies. Y Combinator S18 batch. Rebranded to Quo in September 2025.

Founders Mahyar Raissi

CEO Mahyar Raissi

Company

Founded

2018

Headquarters

San Francisco, United States

Financials

Total Funding

$161M

Sectors

Artificial Intelligence SaaS Productivity Enterprise Software

www.openphone.com Twitter Blog

Funding History

4 rounds

Series C Sep 23, 2025

$105M

General Catalyst (Lead)

Series B Apr 7, 2022

$40M

Tiger Global Management (Lead) Craft Ventures Slow Ventures Garage Capital Kindred Ventures

Series A Nov 17, 2020

$14M

Craft Ventures (Lead) Y Combinator Slow Ventures Kindred Ventures Garage Capital Elad Gil Rahul Vohra

Seed Jan 29, 2020

$2M

Slow Ventures (Lead) Y Combinator Kindred Ventures Garage Capital Hack VC

Funding data is compiled from multiple independent sources including company announcements, press coverage, and regulatory filings. While we strive for accuracy, amounts and dates may reflect reported figures at time of announcement.