Startup profile · funding coverage
Adaptive Security
AI-native platform simulating deepfake voice, SMS, and email attacks to train employees against social engineering.
Stage
series b
Status
private
Coverage
full
Why Adaptive Security is interesting
OpenAI's first cybersecurity investment — Adaptive runs realistic multi-channel attack simulations and real-time risk scoring, founded by Attentive veterans Brian Long and Andrew Jones.
Key facts
- Series A (Apr 2025): $43M co-led by a16z and OpenAI Startup Fund with Eniac Ventures (Adaptive Security blog)
- Series B (Dec 2025): $81M led by Bain Capital Ventures; a16z and OpenAI Startup Fund participated (PR Newswire)
- OpenAI Startup Fund's first cybersecurity investment (company press)
Investors in our directory
Funds linked from Adaptive Security's profile — open a fund page for stage focus and related deal articles.
Industries
Cybersecurity AI & Machine Learning Enterprise SaaS
Industry hub pages are rolling out from our fund-derived baseline taxonomy.
FAQs about Adaptive Security
Funding context and why this company shows up in venture coverage.
Adaptive Security runs AI-generated attack simulations across voice, SMS, and email to train employees against deepfake and social-engineering threats, plus real-time triage of suspicious messages.
a16z and the OpenAI Startup Fund co-led the $43M Series A (Apr 2025). Eniac Ventures (/fund/eniac-ventures) participated; Bain Capital Ventures led the $81M Series B (Dec 2025). See /fund/andreessen-horowitz.
Series B after $43M Series A (Apr 2025) and $81M Series B (Dec 2025).
It was OpenAI Startup Fund's first cybersecurity bet — addressing CISO concerns that AI deepfakes outpace legacy security awareness training.
No — remains private as of July 2026.
Last updated: 2026-07-24