Reach Security Raises $50M Series B

Reach Security, a San Francisco-based AI-powered security startup, has successfully raised over $50 million in Series B funding. The company specializes in an AI platform that operates security defenses at machine speed, providing enterprises with a source of truth for their existing security controls to autonomously close attack paths.

Investors

The funding round was led by Top Tier Capital Partners. Additional participation included Ballistic Ventures, In-Q-Tel, and M12, Microsoft's Venture Fund, along with several existing investors.

Reach Security Use of Funds

The company plans to use the new capital to support product innovation, extend its integration partnerships, facilitate international expansion, and drive continued growth within the U.S. enterprise and federal markets.

About Reach Security

Founded by CEO Garrett Hamilton and CTO Colt Blackmore, Reach Security provides a deterministic AI platform designed to continuously discover, analyze, validate, and optimize security controls. The company aims to move organizations from human-paced to machine-speed security by identifying and mitigating exploit paths using the security products an enterprise already owns.

Funding Details

Company Website: https://reach.security

Company: Reach Security
Raised: $50M
Round: Series B
Funding Date: October 13, 2026
Lead Investor: Top Tier Capital Partners
Additional Investors: Ballistic Ventures, In-Q-Tel, M12, Microsoft's Venture Fund
Software Category: Cybersecurity
Source: https://www.globenewswire.com/news-release/2026/10/13/3379991/0/en/reach-security-raises-more-than-50m-series-b-to-stop-ai-powered-attacks-by-autonomously-closing-the-gaps-they-target.html