Reach Security
Category: AI in Cybersecurity
AI-native security platform that finds and autonomously fixes misconfigurations and control gaps in the security tools enterprises already own. Reach Security was founded in 2021. The company is led by Garrett Hamilton. Based in San Francisco, United States. Team size: 101-500. Total funding raised: >$80M. Latest round: Series B. Key investors include Top Tier Capital Partners, Ballistic Ventures, In-Q-Tel, M12 (Microsoft's Venture Fund), Artisanal Ventures, Ridge Ventures, Webb Investment Network, TechOperators, Mark McLaughlin.
- Founded
- 2021
- Headquarters
- San Francisco, United States
- Team size
- 101-500
- Total funding
- >$80M
Value proposition
Gives security teams a single interface to understand, validate and operate their existing security controls at scale. It finds misconfigurations, control weaknesses and exposures, then drives prioritized, guided or autonomous remediation, so teams get more from current tools instead of buying new ones.
Products and solutions
Reach platform covering security controls hardening, vulnerability mitigation, configuration drift prevention, network security assurance, security posture visibility, zero trust implementation and tool rationalization, Reach Everywhere (launched Oct 2026), which delivers security control findings via APIs, MCP and partner integrations into SOC and AI workflows.
Unique value
Deterministic, non-hallucinating AI that reprograms an organization's existing security stack based on who it is and how it is being attacked. Requires no new sensors, infrastructure or attack simulations: setup takes minutes from a read-only API key, with results in under 5 days.
Target customer
Enterprise CISOs and security operations teams, Fortune 500/Global 2000, and U.S. federal agencies
Industries served
Enterprise cybersecurity across industries, federal and government
Technology advantage
Deterministic AI decision engine built by founders who did ML malware detection at Palo Alto Networks and Cylance. It works across the entire security estate rather than only the cloud, and turns exposure insight into autonomous, machine-speed remediation using tools customers already own.
How they differentiate
Optimizes and autonomously remediates the configuration of existing security controls across the whole stack, rather than adding another point product. Competitors focus on detection, vulnerability aggregation or attack simulation.
Main competitors
Veriti (Check Point), Nagomi Security, ArmorCode
Key partnerships
Microsoft (Microsoft for Startups Pegasus Program, Microsoft Partner, M12 investor), Presidio (channel partner), In-Q-Tel (strategic investor)
Notable customers
Autodesk
Major milestones
Mar 2024: $20M Series A led by Ballistic Ventures. Oct 2026: $50M+ Series B led by Top Tier Capital Partners, alongside the launch of Reach Everywhere (APIs/MCP delivery). Awards include 2026 SC Awards Trust Award, 2026 Cyber Defense Magazine Global Infosec Award, CRN Stellar Startup 2025, and SOC 2 Type 2.
Growth metrics
Dealroom valuation estimate is $100–250M. Raised a $50M+ Series B in Oct 2026 after a $20M Series A in Mar 2024.
Market positioning
Exposure management / security control optimization leader positioned as AI defense against AI-powered attacks; expanding into federal and international markets
Geographic focus
United States (enterprise and federal), with international expansion planned
About Garrett Hamilton
Ex-Palo Alto Networks product leader (guided WildFire from launch to 60,000+ customers); background in threat analysis, training and consulting; University of California, San Diego.
Latest news about Reach Security
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Official website: https://reach.security