Fundraising Fox
/People
Sign in

Brian Long

InvestorFounder

Founder & CEO at Adaptive Security · Founder at Tone

United States

FoundedAdaptive SecurityTone

Find your path to Brian

431 people in our graph can introduce you to Brian.

Each arrow is one introduction. Sign up to fill in the first one.

Ask Scott Friend to introduce you to Brian

You →Scott · together at TapCommerce (2013–2014) →Brian

Ask Jamie Chen to introduce you to Brian

You →Jamie · together at Adaptive Security →Brian

Ask Sam Okafor to introduce you to Brian

You →Sam · 3 people · together at TapCommerce →Brian

Sign up to find every way you can get introduced to Brian

  • Your email: the people you already email who know Brian
  • 2nd- and 3rd-degree connections: people you know who worked, studied or invested with Brian
  • Your LinkedIn: the connections who can make the intro for you

We rank every route by how warm it is, so you raise on warm intros instead of cold emails.

Sign up with GoogleAlready have an account? Log in

About

Brian Long is the CEO and Co-Founder of Adaptive Security, a cybersecurity platform focused on AI-related threats such as deepfakes, voice cloning, and phishing, which has raised over $145 million from investors including NVIDIA and the OpenAI Startup Fund. He previously co-founded Attentive, a marketing technology platform, where he served as Executive Chairman and Board Director, and co-founded TapCommerce, which was acquired by Twitter in 2014. Following that acquisition, he worked as a Senior Director at Twitter.

Likely emails· guessed from name + firm domain, not firm-published

Founder & CEO at Adaptive Security

Intro paths

→

In turn, Brian can intro founders to Adaptive Security's investors below.

Adaptive Security's investors · 12

Abstract VenturesSan Francisco · $250K – $750K checks · since 2025Andreessen HorowitzMenlo Park · $500K – $50M checks · since 2025Bain Capital VenturesBoston · $1M – $100M checks · since 2025Capital One VenturesMcLean · since 2025Citi VenturesNew York · since 2025Eniac VenturesNew York City · $1.2M checks · since 2025K5 GlobalSan Francisco · $1M – $3M checksNVenturesSingaporeNVenturesSanta ClaraNVIDIASanta Clara · since 2025OpenAI Startup FundSan Francisco · $1M checks · since 2025Scribble VenturesPortola Valley · $750K – $1.5M checks

Co-founders at Adaptive Security

AJAndrew Jones
Andrew JonesFounder

Founder at Tone

Intro paths

→

In turn, Brian can intro founders to Tone's investors below.

Tone's investors · 25

Bain Capital VenturesBoston · $1M – $100M checks · since 2018Base10 PartnersSan Francisco · $100K – $5M checks · since 2018Beyond CapitalSan Diego · since 2018Bling CapitalMiami Beach · $1M – $5M checks · since 2018Breakpoint CapitalAspen · since 2018Coatue ManagementNew York · $1M – $20M checks · since 2018Disney Acceleratorsince 2018Eniac VenturesNew York City · $1.2M checks · since 2018Felicis VenturesSan Francisco · $500K – $15M checks · since 2018Frontline VenturesSan Francisco · $540K – $3.2M checks · since 2018Gutbrain VenturesBoston · since 2018High AlphaIndianapolis · since 2018Insight PartnersNew York · $120M – $350M checks · since 2018IVP (Institutional Venture Partners)San Francisco · $15M – $75M checks · since 2018Mana VenturesEstero · since 2018Mangrove Capital PartnersLuxembourg · $540K – $5.4M checks · since 2018MetaPropNew York · $100K – $1M checks · since 2018NextView VenturesNew York · $250K – $4M checks · since 2018One Way VenturesNew York · $500K – $1.5M checks · since 2018Sapphire VenturesAustin · $5M – $20M checks · since 2018Sequoia CapitalMenlo Park · $100K – $50M checks · since 2018SoftBank Vision FundLondon · since 2018Tenacity VenturesBengaluru · $10M checks · since 2018Vertex VenturesPalo Alto · $500K – $10M checks · since 2018Vertex Ventures Sea Management Pte. Ltd.Singapore · $500K – $3M checks · since 2018

Co-founders at Tone

PA
Pedro AraujoFounder
LB
Luis BragaFounder
DA
Daniel AraujoFounder

Experience

  1. Adaptive SecurityCEO & Co-Foundercurrent2023 — present
  2. Problem Hunting: the tech startup textbookAuthorcurrent2023 — present
  3. AttentiveExecutive Chairman & Board Directorcurrent2023 — present
  4. AttentiveCEO & Co-Founder2016 — 2023New York City Metropolitan Area
  5. TwitterSr Director2014 — 2016New York, NY
  6. TapCommerceCEO & Co-Founder2012 — 2014New York
  7. Crossboard MobileSVP Mobile2011 — 2012
  8. Crossboard MobileDirector of Sales2009
  9. CBS InteractiveNetwork Sales Manager & Account Director2008
  10. CNET NetworksAccount Executive2006 — 2008
  11. CNET NetworksAccount Representative2006

Skills & more

Online Advertising39Mobile Advertising29Digital Marketing12Digital Media11Mobile Marketing14Digital Strategy15Strategic Partnerships8Lead Generation6Start-ups38Media Buying1Sales2SEM5
+8 moreAffiliate MarketingSocial Media MarketingSEOInteractive MarketingE-commerceMobile DevicesOnline MarketingOnline Lead Generation

From Brian's professional profile.

Investments

Per curated public sources.

Frequently asked questions

Who is Brian Long?
Brian Long is the CEO and Co-Founder of Adaptive Security, a cybersecurity platform focused on AI-related threats such as deepfakes, voice cloning, and phishing, which has raised over $145 million from investors including NVIDIA and the OpenAI Startup Fund. He previously co-founded Attentive, a marketing technology platform, where he served as Executive Chairman and Board Director, and co-founded TapCommerce, which was acquired by Twitter in 2014. Following that acquisition, he worked as a Senior Director at Twitter.
Where does Brian Long work?
Brian Long is Founder & CEO of Adaptive Security and Founder at Tone.
What companies did Brian Long found?
Brian Long founded Adaptive Security, Tone.
What companies has Brian Long invested in?
Investments tracked here include Amiato, Trackstar.
Where did Brian Long go to school?
Brian Long studied at University of Pennsylvania (BA); NYU Stern School of Business (MBA, Finance).

Founder mafias

Adaptive Security mafia2

Also came through, then founded or led a company.

Andrew JonesFounderFounded TapCommerce

Same school

Shared employers