Brian Long, Founder of Adaptive Security

Brian Long is the founder of Adaptive Security. Adaptive Security has raised $900M, latest Series A $55M (2025). Cybersecurity · New York, NY.

About Brian Long

Brian Long is the founder of Adaptive Security. Adaptive Security operates in Cybersecurity and is based in New York, NY. Adaptive Security has raised $900M, latest Series A $55M (2025). Backers on record include Ajay Agarwal, Ali Hamed, Hadley Harris, Nathan Krishnamurthy, Ray Chan, Bain Capital Ventures and 4 others.

Brian Long at a glance

Company
Adaptive Security
Industry
Cybersecurity
Location
New York, NY
Total raised
$900M
Investors on record
Ajay Agarwal, Ali Hamed, Hadley Harris, Nathan Krishnamurthy, Ray Chan, Bain Capital Ventures, Capital One Ventures, Crossbeam Venture Partners

Frequently asked about Brian Long

Who is Brian Long?
Brian Long is the founder of Adaptive Security. Full profile, funding history and background on StartupFundraising.com.
What company did Brian Long found?
Brian Long founded Adaptive Security, a Cybersecurity company based in New York, NY.
How do I contact Brian Long?
Verified contact routes including LinkedIn, background and funding history for Brian Long are available on the StartupFundraising.com founder profile.

This founder profile draws on disclosed rounds, filings and investor records in the StartupFundraising database and is updated as new funding is recorded. Founders raising now use profiles like this one to study comparable Cybersecurity journeys in New York — who backed them, at what stage, and how much they raised.

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