33N
Venture capitalSilicon Valley · Seed–Series B · 49 people tracked
Investment thesis
33N is a European VC firm investing globally in frontier Cybersecurity, AI, and Defense companies that secure and power the AI era. With more than a decade of specialist experience across the modern cyber cycle, the firm backs early-stage founders building category leaders, having supported three unicorns at their earliest rounds and seen portfolio companies acquired by global tech giants. The firm leverages proprietary data, deep sector knowledge, and relationships, and is backed by a network of 50+ CISOs, AI and data leaders, and operators organized into two forums — the CISO Circle and the AI & Data Circle — to connect portfolio companies with customers, channels, and technical talent.
Source: firm website, verified Aug 3, 2026.
Team · 49 people
from the firm's website & public directoriesWhat they invest in
from 10 of 29 portfolio companiesCybersecurity ×8Enterprise Software ×7AI & Machine Learning ×5SaaS ×4Developer Tools ×3Data & Infrastructure ×2Fintech ×2Cloud Computing ×1
HQs:United States×1
Investments · 29 tracked
founders shown can be your intro pathArctic Wolf provides managed detection and response (MDR) services with 24x7 security teams that detect, investigate, and respond to threats using an open XDR platform processing trillions of events weekly.
AI & Machine LearningCybersecurityEnterprise SoftwareSaaS
Brian NeSmith(Founder & CEO)
Bitsight provides a cyber risk intelligence platform that monitors entities across the internet to identify vulnerabilities and emerging threats in real time.
AI & Machine LearningCybersecurityData & InfrastructureEnterprise SoftwareCambridge, US
Nagarjuna Venna(Executive Officer, Director)Shaun McConnon(Executive Officer, Director)Robert T Turner(Executive Officer, Director)Brendan Hanningan(Director)David Fachetti(Executive Officer, Director)Stephen Boyer(Executive Officer)
DataGalaxy is a data and AI governance platform that helps organizations create context from their data, enforce governance policies, and track the business value of AI initiatives.
AI & Machine LearningData & InfrastructureEnterprise Software
Feedzai provides AI-powered fraud detection and financial crime prevention for banks and financial institutions.
AI & Machine LearningCybersecurityFintech
Nuno Sebastião(Founder & CEO)in
Jscrambler provides client-side application security, including polymorphic JavaScript code protection, software supply chain defense, and browser data governance to protect web applications against reverse-engineering, digital skimming, and third-party script vulnerabilities.
CybersecurityDeveloper ToolsEnterprise Software
Cybersecurity company providing automated breach and attack simulation solutions to enterprise customers.
AI-powered security command center combining SIEM, SOAR, and workflow automation
Portfolio news
latest coverage across their companiesApono · securityweek.com · Jun 25, 2026
Feedzai · fintechfutures.com · Oct 7, 2025
Frequently asked questions
- What stage does 33N invest at?
- 33N invests at the Seed, Series A, Series B stages.
- What is 33N's typical check size?
- 33N typically writes checks of $4.3M – $13M.
- What sectors does 33N focus on?
- 33N focuses on AI & Machine Learning, Cybersecurity, Data & Infrastructure, Defense Tech, Enterprise Software, SaaS.
- Where is 33N located?
- 33N is headquartered in Silicon Valley, LU.
- Does 33N lead rounds?
- Yes, 33N leads investment rounds.
Images
Co-investors · 19
Bright Pixel Capital is an investment firm backing technology companies, with a strong focus on cybersecurity, retail tech, and infrastructure software across multiple geographies.
JME Ventures is a Spain-focused seed-stage venture capital firm that backs founders building world-class solutions, having invested in over 70 startups since 2012.
Lightspeed Venture Partners is a global venture capital firm known for backing AI and technology founders, emphasizing deep, hands-on partnerships with the companies it funds.
Bessemer Venture Partners is a venture capital firm that partners with entrepreneurs from early stages through every stage of growth, publishing investment roadmaps across multiple technology sectors.
Accel is a venture capital firm that partners with exceptional founding teams, positioning itself as a first partner to startups globally.
Balderton Capital's portfolio page listing companies it has backed across stages, sectors, and geographies, primarily in Europe.
Unusual Ventures is an early-stage venture capital firm that backs enterprise founders from initial insight through market leadership, providing a proprietary playbook for finding product-market fit.
AllegisCyber Capital is a venture capital firm focused exclusively on cybersecurity investments, emphasizing deep domain expertise and operating experience.
360 Capital is a European venture capital firm active since 1997, investing in innovative technology startups across deep-tech, climate-tech and digital sectors.
Adara Ventures is an early-stage technology investor with roughly two decades of experience backing companies built on proprietary data, trust, domain depth and physical systems.
Swanlaab Venture Factory is a Spanish venture capital firm that invests in and actively supports founders building high-growth companies, providing capital, strategic expertise and hands-on company-building support.
GV (formerly Google Ventures) is a venture investment firm that backs founders across many industries, aiming to build long-term relationships and support companies across multiple stages and milestones.
▶7 more co-investors
Intel CapitalNextGen Venture PartnerseCAPITAL ENTREPRENEURIAL PARTNERSSands Capital VenturesPortugal VenturesSunvest Capital PartnersArctic Wolf
Firms observed investing alongside 33N, from public investor directories. Shared companies are the overlap with 33N's recorded portfolio.
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