📋 Companies without security.txt
These domains have no security.txt file (RFC 9116), indicating they lack a formal vulnerability disclosure policy.
Which companies don't have a security.txt file?
security.txt (RFC 9116) is the internet standard for publishing vulnerability disclosure policies. It tells security researchers how to report vulnerabilities, who to contact, and what encryption to use. Companies with a valid security.txt signal a mature security program — they're more likely to have SOC 2 certification, bug bounty programs, and dedicated security teams. Its absence is a red flag in vendor security assessments.
LynxRadar scanned 2378 domains including Fortune 500 companies and Y Combinator startups. Of those, 35 (1%) were found to have this security gap. The data above is updated continuously as new domains are scanned. Scan any domain to check its status.