Harvey acquires Guardrails AI

● STRATEGIC | DEVTOOLS/INFRASTRUCTURE · AI Models & Infrastructure

SEPTEMBER 17, 2026

Harvey acquires Guardrails AI

TARGET

Open-source AI agent reliability and simulation infrastructure; helps engineering teams detect where agents stray from intended behavior and manage agent risk in real time.

Ownership	VC-backed · Zetta Venture Partners, Bloomberg Beta, Pear VC, Factory, Microsoft
Headquarters	San Francisco, California
Leadership	Shreya Rajpal, Co-founder and CEO
Sell-side advisor	—

ACQUIRER

Harvey

AI platform for legal research, contract analysis, and autonomous agent workflows for law firms and in-house legal teams

Ownership	VC-backed · Diffusion, Lightspeed Venture Partners, Sequoia Capital, Kleiner Perkins, Andreessen Horowitz +10 more
Capital raised	$1.55B+
Headquarters	San Francisco, California
Leadership	Winston Weinberg, CEO
Buy-side advisor	—

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Harvey -> Guardrails AI  (2026-09-18)
strategic_acquisition | DevTools/Infrastructure | announced
Target: Open-source AI agent reliability and simulation infrastructure; helps engineering teams detect where agents stray from intended behavior and manage agent risk in real time.
Website: guardrailsai.com | Buyer site: harvey.ai
HQ: San Francisco, California | Ownership: vc-backed | Buyer ownership: vc-backed
Advisors - not yet credited
Source: Thematic - https://thematichq.com/software/d/harvey-guardrails-ai.html

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