Brian Long
FounderFounder & CEO at Adaptive Security · Founder at Attentive
United States
FoundedAdaptive SecurityAttentive
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.
Founder & CEO at Adaptive Security
Intro paths
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In turn, Brian can intro founders to Adaptive Security's investors below.
Adaptive Security's investors · 11
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 · $1.2M checksK5 GlobalSan Francisco · $1M – $3M checksNVenturesSanta ClaraNVenturesSingapore · $25K – $2.5M checksOpenAI Startup FundSan Francisco · $1M checks · since 2025Scribble VenturesPortola Valley · $750K – $1.5M checks
Co-founders at Adaptive Security
AJ
Andrew JonesFounder
Founder at Attentive
Intro paths
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In turn, Brian can intro founders to Attentive's investors below.
Attentive's investors · 22
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 2018Coatue ManagementNew York · $1M – $20M checks · since 2018Disney Acceleratorsince 2018Eniac VenturesNew York · $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 2018MetaPropNew York · $100K – $1M checks · since 2018NextView VenturesSan Francisco · $250K – $4M checks · since 2018One Way VenturesNew York · $500K – $1.5M checks · since 2018Sapphire VenturesMenlo Park · $5M – $20M checks · since 2018Sequoia CapitalMenlo Park · $4.4M – $214M checks · since 2018SoftBank Vision FundLondonTenacity VenturesBengaluru · $10M checks · since 2018Vertex VenturesPalo Alto · $500K – $10M checks · since 2018Vertex Ventures Sea Management Pte. Ltd.Singapore · $2.2M – $40M checks · since 2018
Co-founders at Attentive
PA
Pedro AraujoFounder
LB
Luis BragaFounder
DA
Daniel AraujoFounder
Experience
- Adaptive SecurityCEO & Co-Foundercurrent2023 — present
- Problem Hunting: the tech startup textbookAuthorcurrent2023 — present
- AttentiveExecutive Chairman & Board Directorcurrent2023 — present
- AttentiveCEO & Co-Founder2016 — 2023New York City Metropolitan Area
- TwitterSr Director2014 — 2016New York, NY
- TapCommerceCEO & Co-Founder2012 — 2014New York
- Crossboard MobileSVP Mobile2011 — 2012
- Crossboard MobileDirector of Sales2009
- CBS InteractiveNetwork Sales Manager & Account Director2008
- CNET NetworksAccount Executive2006 — 2008
- CNET NetworksAccount Representative2006
Education
- University of PennsylvaniaBA2002 — 2006
- NYU Stern School of BusinessMBA, Finance
Skills & more
Online Advertising39Mobile Advertising29Digital Marketing12Digital Media11Mobile Marketing14Digital Strategy15Strategic Partnerships8Lead Generation6Start-ups38Media Buying1Sales2SEM5
+8 more
Affiliate MarketingSocial Media MarketingSEOInteractive MarketingE-commerceMobile DevicesOnline MarketingOnline Lead GenerationFrom Brian's professional profile.
Frequently asked questions
- Where does Brian Long work?
- Brian Long is Founder & CEO at Adaptive Security and Founder at Attentive.
- What companies did Brian Long found?
- Brian Long founded Adaptive Security, Attentive.
Founder mafias
University of Pennsylvania mafia192
Also came through, then founded or led a company.
Scott Wolf, MDBAFounded Cardiac Dimensions +3Trevor PriceB.A.Founded Docent Health +2Ben LererBSFounded Thrillist +1Eric HeilBSEFounded Ladderbio +1Lyle BerkowitzBSEFounded Apollo Health +1Hari SundramDoctor of Medicine (MD)Founded Write Wise +1
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+ 185 more
NYU Stern School of Business mafia48
Also came through, then founded or led a company.
Andrew JonesB.S.Founded Adaptive Security +1Tushar JainFinance and Political ScienceFounded ePatientFinder +1Alex LyashokMBAFounded WorkFusion +1Mattan GriffelBachelor of Science (BS)Founded One Month +1Ben ColmanMBAFounded Realitydefender +1Danny BrowneBS in Business with Concentration in FinanceFounded Station F
+ 41 more
Attentive mafia3
Also came through, then founded or led a company.
Adaptive Security mafia2
Also came through, then founded or led a company.
Same school
Also attended University of Pennsylvania765
Dasha MaggioPartner at Felicis Ventures, writer on venture capital and founder psychologyNancy WangInvestor at Felicis VenturesLeah von SiemensPartner at Manta Ray VenturesEghosa OmoiguiFounder and Managing General Partner at EchoVC PartnersAkshat GoenkaInvestor at Moonfire VenturesJames KuklinskiInvestor at Spark Capital
+ 759 more
Also attended NYU Stern School of Business413
Luna SchmidInvestor at GV (Google Ventures)Kaz TeradaVenture Advisor at Monta Vista CapitalNeil FongManaging Director Asia at Burda Principal InvestmentsAlex TosoliniAdvisor at CincyTechMax WechterSenior Director of AI at Lerer HippeauKrupa VankayalaPartner, People & HR at Sapphire Ventures
+ 407 more
Shared employers
Also worked at Adaptive Security2
Also worked at Attentive18
Pat GradyPartner at Sequoia CapitalSangeen ZebInvestor at GV (Google Ventures)Siddharth RamakrishnanPrincipal at Scale Venture PartnersTom LoverroInvestor at IVP (Institutional Venture Partners)Krista CoppermanOperating Partner at TCVZach MagdovitzCo-Founder at Lorimer Ventures
+ 12 more
