Callbook is an AI-powered phone receptionist platform founded in 2024 in San Francisco, California. The company was created to solve a critical problem for service businesses: missed phone calls that result in lost customers and revenue.
Founded by Michael Chen, a former Google engineer, and Sarah Johnson, a Stanford PhD and former Amazon Alexa AI lead, Callbook uses advanced natural language processing to answer calls 24/7, understand customer needs, book appointments, and capture leads automatically.
Today, Callbook serves over 10,000+ service businesses across 22 industry verticals including plumbing, HVAC, electrical, automotive repair, medical practices, and legal firms. The platform has answered more than 1 million calls and helped customers generate over $50 million in additional revenue.