Observed Signal · Jun 23, 2026 · Funding (Series A) · Source: a16z · Impact: 2/5 · Sentiment: Neutral
a16z Leads $34M Series A in Probook
Andreessen Horowitz (a16z) is leading a $34 million Series A in Probook, a startup that builds dispatch-first AI software for home-services operators. Probook’s product centers on the scheduling/dispatch decision — matching the right technician to each job — then expands outward into intake, data cleaning, customer messaging and outbound workflows using a shared context layer. The company has deployed across hundreds of locations, including independent shops and private-equity-backed platforms, and cites customer outcomes such as Summers Plumbing booking 2,542 jobs in month one and Del-Air doubling productivity per dispatcher. The round brings Probook’s total financing to $40 million after a seed led by Sequoia. Founders include CEO George Eliadis, CTO Lewis Zhang and co-founder Ben Cervantez. The firm sells direct deployments and is hiring; website referenced: probook.ai.
Venture funding in a vertical AI B2B SaaS that targets operational decisioning (dispatch) is relevant to broader AI and MarTech trends, but it does not directly change core AdTech infrastructure or measurement.
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Key Takeaways & Evidence Grounding
- a16z is leading Probook’s $34 million Series A round.
- Probook’s total funding is $40 million after a seed round led by Sequoia.
- Probook built a dispatch-first AI platform for home services that also handles intake, data scrubbing, customer messaging and outbound.
- Probook is deployed across hundreds of locations, with customers including TurnPoint Services, Master Trades Group, Del-Air, Peterman Brothers, Sila Services and Summers Plumbing, Heating & Cooling.
- Customer outcomes cited: Summers Plumbing booked 2,542 jobs in its first month on Probook; Del-Air increased productivity from 10 to 22 technicians per dispatcher.
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Recent verified developments and strategic activity across this market segment.
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