Squared Circle is an operator-led venture capital firm founded by four-time Chief Information Security Officer (CISO) Karl Mattson that specializes in pre-product, pre-revenue seed-stage investments within the cybersecurity sector across the United States and Israel. The firm targets the earliest phase of company formation, deploying capital tickets between $250,000 and $500,000 to participate in first priced financing rounds without requiring a board seat. Backed by Mattson's background as an AWS Super Angel, Squared Circle provides its portfolio companies with dedicated operational support—specifically focusing on securing initial design partners and first customers—alongside a structured suite of technical benefits that includes $200,000 in AWS Activate credits and direct access to specialized AWS account teams.