A business angel is an individual who invests personal money in an early-stage company, often in exchange for equity and sometimes with mentoring, introductions, or hands-on advice. Angels are important in startup finance because they help founders bridge the gap before larger venture funding becomes available.
In cyber security, business angels matter because investing is a trust-heavy, document-heavy process. Angels may receive cap tables, due-diligence files, payment instructions, and sensitive startup data, which makes them a target for phishing, spoofed identities, and document tampering. In syndicates, the risk grows as more people share files and approvals. Defenses include strong identity verification, multi-factor authentication, secure data rooms, and call-back checks for wire transfers. Good hygiene protects both the money and the deal process.