259 Cyber Security companies in United States

259 Cyber Security companies in United States with 406 founders and decision-makers, led by San Francisco. 188 verified founder emails. Updated 2026-10-03.

Key findings

• FindMeMail tracks 259 Cyber Security companies in United States, with 406 founders and decision-makers listed.
• San Francisco is the top city, with 31 of them (12%), followed by New York (26).
• The most common team size is 1-10 employees (80% of companies).
• 107 (41%) were founded in the last three years.
• 54 have a recorded funding round; the most common is Seed (16).
• 119 companies (46%) have at least one verified founder email, 188 verified emails in total.

Breakdown

Top cities

• San Francisco: 31 (12%)
• New York: 26 (10%)
• Austin: 9 (3%)
• Seattle: 6 (2%)
• Dallas: 6 (2%)
• Dover: 6 (2%)
• Philadelphia: 5 (2%)
• Palo Alto: 5 (2%)

Team size (employees)

• 1-10: 206 (80%)
• 11-50: 22 (8%)
• 501-1000: 10 (4%)
• 101-250: 7 (3%)
• 51-100: 5 (2%)
• 251-500: 5 (2%)

Latest funding round

• Seed: 16 (6%)
• Pre-Seed: 14 (5%)
• Venture - Series Unknown: 6 (2%)
• Non-equity Assistance: 5 (2%)
• Grant: 4 (2%)
• Debt Financing: 2 (1%)
• Angel: 2 (1%)
• Corporate Round: 1 (0%)

Founded (last 10 years)

• 2017: 4 (2%)
• 2018: 10 (4%)
• 2019: 12 (5%)
• 2020: 13 (5%)
• 2021: 10 (4%)
• 2022: 7 (3%)
• 2023: 8 (3%)
• 2024: 4 (2%)
• 2025: 84 (32%)
• 2026: 19 (7%)

Recently added Cyber Security companies in United States

• Crestpoint Enterprises — Pittsburgh, United States: An AI-first technology consulting firm that specializes in building custom SaaS solutions designed to solve complex business problems.
• Watch Owl Labs — San Francisco, United States: cybersecurity company
• Spikes Cybersecurity — San Francisco, United States: Spikes Cybersecurity develops consumer cybersecurity solutions to defend everyday users against advanced social engineering threats.
• Western Regional Innovation & Technology Alliance — Minneapolis, United States: Western Regional Innovation & Technology Alliance unites public sector IT leaders to provide training and peer networking.
• Doorstop — Dover, United States: Doorstop helps IT and security teams understand and fix user access as it drifts over time.
• Fixure — Dover, United States: Fixure is a security decision software company that unifies scanner and CNAPP alerts into actionable root-cause insights for teams.
• particleknot. — Seattle, United States: Particleknot is a platform that provides a unified account and balance across multiple blockchain ecosystems.
• Hornback Strategic Services — Hawthorne, United States: Hornback Strategic Services provides information security, CMMC, and mission assurance consulting for defense industrial base clients.
• RogoLabs — Chicago, United States: RogoLabs is a cybersecurity company that offers open‑source vulnerability intelligence tools.
• Foil — San Francisco, United States: Detect AI agents and malicious devices (ab)using your business
• TaaSPak — Duluth, United States: TaaSPak is an IT services company that offers cybersecurity, VoIP, and cloud solutions.
• Oceanir — Miami, United States: Verification infrastructure, Visual intelligence, Geo-estimation
• VeriRFP — Columbus, United States: RFP, security questionnaire, DDQ, and vendor risk automation for B2B revenue and security teams.
• Syndrax LLC — Wyoming, United States: Cloud Infrastructure, Cybersecurity, Network Security
• Actionable Security — Sparta, United States: Actionable Security is a cybersecurity firm that provides risk assessments, email security, and virtual CISO advisory services.
• Cited Relevance — Atlanta, United States: Developer of the Hayes Protocol SP-2026-VGEO. We establish Sovereign Graph Verification for enterprise AI.
• HAWK Security Group — Santa Fe, United States: HAWK Security Group provides managed security, privacy, and executive protection services for visibility individuals and organizations.
• Pulse Check Advisory Solutions — New York, United States: Pulse Check Advisory Solutions LLC provides enterprise cloud architecture, observability, DevSecOps, DataOps, MLOps, and GenAI consulting.
• Complyn — Rigby, United States: Complyn is a software company that provides SaaS, cybersecurity, and CRM services.
• AFO Cyber — Richmond, United States: AFO Cyber is a cybersecurity company that specializes in protecting individuals and businesses from cyber threats.
• CISO Ascent — Dallas, United States: Where CISOs and Nature Connect
• Cocha Technology Inc. — Kingwood, United States: Cybersecurity and fractional CISO firm serving law firms, O&G, medical device, and PE-backed companies in Houston and nationwide.
• Puma Managed IT — Lake Panasoffkee, United States: Puma Managed IT provides managed IT, cybersecurity, telecom, and AI-driven automation services for enterprise organizations.
• Guardantix — Philadelphia, United States: Fractional Executive Services
• Miami Cyber — Miami, United States: Miami Cyber is an IT services company that provides cybersecurity, AI integration, and digital security services.
• VIT Solutions — New York, United States: Professional, White Glove IT Services and IT Consulting, Delivering Solutions that fit your Business Needs.
• PM ITS — Miami Lakes, United States: PM ITS provides IT consulting, system integration, cloud adoption, and managed support.
• FortiShield Tech Group — Lehigh Acres, United States: FortiShield delivers advanced cybersecurity with 24/7 monitoring, threat detection, penetration testing & compliance for all businesses.
• TheHappyMod — Los Angeles, United States: A mobile security utility providing verified APK installation and real-time virus scanning for Android applications.
• Quantum Solutions — Philadelphia, United States: Post-Quantum Cryptography

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Frequently asked questions

How many Cyber Security companies in United States are there?

FindMeMail currently lists 259 Cyber Security companies in United States with at least one founder or decision-maker identified. The count updates daily as new companies are added.

Where are most Cyber Security companies in United States based?

San Francisco (31), New York (26), Austin (9).

How do I contact founders of Cyber Security companies in United States?

188 verified founder emails are available for these companies on FindMeMail. Create a free account to get 50 free reveals, then buy one-time credit packs from $12.

Related reports

• Software companies in United States (3,675)
• Artificial Intelligence (AI) companies in United States (2,382)
• Seed-stage startups in United States (1,905)
• Information Technology companies in United States (1,861)
• Health Care companies in United States (1,647)
• E-Commerce companies in United States (1,545)
• SaaS companies in United States (1,304)
• Pre-seed startups in United States (1,096)
• Financial Services companies in United States (1,062)
• Manufacturing companies in United States (959)
• Consulting companies in United States (949)
• Internet companies in United States (824)

Methodology: counts include companies in the FindMeMail database with at least one identified founder or decision-maker. Data refreshes automatically as new companies are added.