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Startups & Venture·June 24, 2026·1 min read

New York-based Probook, which is building an AI operating system for home service businesses, raised a $34M Series A led by a16z and a $6M seed led by Sequoia

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An "AI OS" for home services with $40M from a16z and Sequoia is a bet that fragmented blue-collar workflows are ready for full-stack automation—scheduling, routing, quoting, and upsell. If you run field services, expect your software vendors to push AI-native replacements rather than bolt-ons to legacy CRMs.

Startups & Venture

Nebulock, which helps security teams proactively find and remediate threats across a company's security stack, raised a $25M Series A led by FirstMark

A $25M Series A into Nebulock’s contextual threat hunting is more evidence that buyers want consolidation across their security stack, not another point scanner. If you run security or platform, expect vendors to pitch "proactive, cross-stack" visibility—pressure-test how they actually correlate signals and shorten time-to-remediation.