Fable Security, a human risk management platform, launched with $31 million in funding from Greylock Partners and Redpoint Ventures. It protects enterprises across industries by deploying targeted, risk-based interventions in real time, directly where employees work.
Founded by Nicole Jiang and Dr. Sanny Liao of Abnormal AI, they aimed to mitigate human risk amid rising AI-driven scams, such as a 60% increase in phishing and a 442% increase in vishing attacks. Traditional security training often fails to reduce risk; Fable understands behavioral risk and targets interventions through the Human Behavior Index. This index analyzes signals from various systems to identify risky employee behaviors, enabling AI-driven, context-aware interventions across Slack, email, and other platforms.
It assesses real-time risk, shapes behavior with timely tactics, and ensures compliance with audit-ready reports. Since its launch, Fable has protected clients such as Pennymac, Genesys, and the DNC, reducing phishing clicks by over 85%, PII exposures by 60%, and enhancing employee engagement.
KEY QUOTES:
“Companies spend billions on cybersecurity, but human risk is still the biggest unsolved problem that every security team wants to fix. One-size-fits-all security awareness programs with generic training modules and phishing simulations do little to actually reduce risk. They are unable to handle the volume, speed, or sophistication of AI threats that exist today. Fable is here to change this paradigm, with a platform purpose-built to tackle the full spectrum of risky employee behaviors at scale.”
Nicole Jiang, co-founder and CEO of Fable Security
“We chose Fable because its personalized approach to security awareness led to more effective and faster employee behavior change.”
Cyrus Tibbs, CISO at Pennymac, noting a 13x faster behavior change during an A/B test after deploying a personalized Fable intervention versus a generic briefing
“Human driven risk remains one of the biggest challenges in cybersecurity as missteps can create direct pathways for malicious attacks. As AI-powered threats evolve, we need AI-driven training to keep pace. Platforms like Fable deliver targeted, adaptive education that meets employees where they are, tracks engagement, and evolves with real-time feedback. That kind of precision is essential to reducing human risk across a large, diverse workforce.”
Arvin Bansal, veteran Fortune 100 CISO
“In the AI era, attackers can now target people with unprecedented precision and effectiveness, making the human layer the most vulnerable layer in security. Fable addresses this head-on by reshaping human behavior with real-time, intelligent interventions. Nicole and Sanny have a distinguished track record of building innovative behavioral AI security products and are redefining the human risk management market at Fable Security.”
Saam Motamedi, General Partner at Greylock Partners
“Security awareness training has become a checkbox—ineffective, outdated, and blind to how people actually behave. Fable is the first company I’ve seen that throws out the playbook of a failing category. They’re building what modern security teams truly need: visibility into human risk, tools to actually change behavior, and AI that moves at the speed of attackers.”
Managing Director at Redpoint Ventures Erica Brescia
