Security Startups

Adaptive Security

Adaptive Security builds AI-driven social engineering defense for enterprises, combining deepfake and phishing simulations, security awareness training and agentic email security.

Proof of life. Raised an $81M Series B led by Bain Capital Ventures, December 2025

About Adaptive Security

Adaptive Security helps organizations defend employees against AI-enabled social engineering. Its platform runs realistic attack simulations across email, SMS, voice and deepfake video.

It scores each employee's risk from how they respond, then assigns targeted training on threats such as voice phishing and deepfakes.

The company has added agentic email security for phishing and business email compromise detection with automated remediation, plus monitoring of risky prompts and data exposure in AI tools. Adaptive was founded in 2024.

Its site lists a New York address, and it is backed by investors including Bain Capital Ventures, the OpenAI Startup Fund and Andreessen Horowitz.

Investors

Abstract VenturesAndreessen HorowitzBain Capital VenturesCapital One VenturesCiti VenturesNVenturesOpenAI Startup Fund
Work at Adaptive Security? Link to this listing

Optional badge for your site or README. It changes nothing about the listing, its order or its review. Other formats and a dark version: press kit.

<a href="https://securitystartups.com/companies/adaptive-security"><img src="https://securitystartups.com/badge/listed.svg" alt="Listed on Security Startups" width="184" height="44"></a>