Sequoia Capital and Andreessen Horowitz have jointly backed Probook, a New York-based startup building an artificial intelligence operating system for home service businesses, with a combined $40 million investment. The funding round includes a $34 million Series A led by a16z and a $6 million seed round led by Sequoia, which also participated in the larger round. The company is targeting a $700 billion industry of HVAC shops, plumbing contractors, and electrical services that have historically relied on fragmented software tools and manual scheduling.

Why Is Dispatch the Critical Problem in Home Services?

Probook founder George Eliadis, a 24-year-old Wharton graduate who spent six summers pressure washing houses with his dad in upstate New York, identified a specific pain point that larger software vendors had overlooked. Home service operators were drowning in point solutions, he explained to Fortune. "Over the last few years, home service operators were sold an explosion of AI tools,voice agents, chat widgets, follow-up bots. They ended up with five vendors and bills growing faster than the revenue those tools promised". The real bottleneck, Eliadis realized, was dispatch: the operational brain that decides which of dozens of technicians gets assigned to which jobs, in what order, with what expected revenue.

"Dispatch is the brain of every home service business. That's where customer experience is made or broken," said George Eliadis, founder of Probook.

George Eliadis, Founder, Probook

Rather than layering another AI tool onto an already fragmented tech stack, Probook built the scheduling brain first, then integrated everything else,call answering, job data cleanup, and customer updates,into one connected system. This architectural choice appears to be resonating with early customers.

What Results Are Early Customers Seeing?

The early traction numbers suggest Probook's approach is working. An Indiana customer with 14 locations and 260 technicians booked 2,542 jobs in its first month without a single human touching the booking process. A Florida operator reduced its dispatch team from 22 people to 10. A Kansas shop achieved the same headcount reduction while growing its average job revenue by 20%. These aren't theoretical improvements; they represent real operational gains in a labor-constrained industry where technician scheduling directly impacts profitability.

Probook's sweetest customer segment right now is private equity-backed home services rollups, investment firms that have been quietly acquiring local HVAC and plumbing shops across the country, bundling them under one roof, and squeezing out efficiencies. That acquisition pace hit 88% growth year-over-year through mid-2025. These rollup operators are laser-focused on profit margins and have the capital to invest in software that demonstrably improves them.

How Does Probook Position Itself Against Established Competitors?

The elephant in the room is ServiceTitan, a $6.3 billion publicly traded company that dominates software for home service businesses and already has its own AI scheduling product. For now, Probook is listed as a ServiceTitan partner, meaning the two technically work together rather than compete directly. Eliadis calls them complementary, and a16z General Partner David Haber described the partnership as "a years-old structural moat" in a written statement. Still, ServiceTitan has $960 million in annual revenue and its own engineering team, so the competitive dynamics could shift as both companies mature their AI capabilities.

What sets Probook apart, according to Sequoia partner Konstantine Buhler, is founder obsession grounded in real-world experience. "Most founders building for the trades have never worked in them. George has," Buhler stated when backing the seed round in early 2025 and doubling down on the Series A. Eliadis was Probook's only salesperson until February 2026, visiting customers' homes, attending their weddings, and sleeping on their couches to understand their pain points intimately.

Steps to Understanding Probook's Market Opportunity

• Market Size: The home services industry collectively represents a $700 billion market, with thousands of small and mid-sized operators still using manual scheduling or fragmented software tools.
• Investor Confidence: Sequoia and Andreessen Horowitz, two of Silicon Valley's most selective venture firms, jointly backing a Series A signals strong conviction in both the founder and the market opportunity.
• Operational Leverage: Early customers are reducing headcount while growing revenue per job, suggesting the AI dispatch system creates measurable economic value that justifies software spending.
• Competitive Positioning: Unlike point solutions that add to the software burden, Probook consolidates multiple functions into one system, addressing a specific pain point that larger platforms have not prioritized.

The funding round reflects a broader venture capital trend: backing founders with deep domain expertise and real operational experience in unglamorous but profitable industries. Eliadis's background pressure washing houses is not a liability; it's the credential that convinced two of the world's most competitive venture firms to invest $40 million in his vision for automating the operational heartbeat of home services.