Best Cybersecurity Companies in Arlington, United States
The 39 best Cybersecurity companies in Arlington, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Shift5.
Our analysis of 71 Cybersecurity companies
$12.5b in tracked funding; 100% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Cybersecurity companies in Arlington
| # | Company | Disclosed funding | Last round | Stage | Employees | Founded | Founder | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Shift5 Platform for intrusion detection and prevention 69Funding top 20%Growth top 26%Moat top 28%Tech top 29% All 10 signals ▾Fundingtop 20% Growthtop 26% Moattop 28% Techtop 29% Patentstop 29% Innovationtop 34% Talentbottom 49% Marketbottom 42% Newsbottom 42% Globalbottom 42% Funding: Raised $108M across 5 rounds · 5 rounds over 7 yrs (0.7/yr) Growth: Headcount 45 → 75 (+67%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 69/100 | $108M | 12 mo ago | Series C | 75 75 → 148 (+97%) | 2018 | Josh Lospinoso CEO | 23 patents Secure firmware integrity and bus intrusion detection for industrial control and communication systems | 3 partnerships |
| 2 | Endgame AI-powered endpoint security solution for threat prevention, detection, and response | $96M | 118 mo ago | Acquired | 137 | 2008 | — | 50 patents AI-driven in‑memory malware and ransomware detection with system‑call analysis | — |
| 3 | WireWheel Cloud based data privacy management software provider | $63M | 66 mo ago | Acquired | 32 | 2016 | Justin Antonipillai Co-Founder & CEO | — | — |
| 4 | Distil Networks Cybersecurity leader protecting applications, data, and APIs from advanced threats | $56M | 121 mo ago | Acqui-Hired | 66 | 2011 | — | — | — |
| 5 | Entevo Cross platform directory management and administration | $25M | 338 mo ago | Acquired | — | 1994 | Amir Hudda Founder & ex-CEO | — | — |
| 6 | ThreatConnect Provider of cyber threat intelligence, risk quantification, and security operations platform | $20M | 87 mo ago | Acquired | 238 | 2013 | — | 16 patents Integrating threat intelligence into browser extensions for automated network security response | — |
| 7 | SCYTHE Provider of adversary emulation platform for vulnerability assessment | $13M | 57 mo ago | Series A | 38 38 → 31 (-18%) | 2017 | Bryson Bort Founder & CEO | 8 patents Patents concentrated in electrical & electronics | — |
| 8 | Giant Oak Machine learning-enabled KYC and AML solutions for financial institutions | $11M | 97 mo ago | Series A | 30 | 2013 | — | 18 patents Adaptive transaction orchestration and domain‑specific negative media search systems | — |
| 9 | Replica Platform offering secure access service edge as a convergence solutions | $8M | 21 mo ago | Series A | — | 2021 | Kristopher Schroeder Founder & CEO | 2 patents Smartphone photogrammetry for automated 3D model generation and object sizing | — |
| 10 | uKnow B2C SaaS platforms for parental control | $4M | 146 mo ago | Acquired | 11 | 2009 | Ashish Khot Co-Founder | — | — |
| 11 | Syncurity Workflow based incident response & collaboration software | $4M | 94 mo ago | Acquired | 1 | 2012 | — | — | — |
| 12 | Consilient AML & CFT solutions for financial institutions | $3M | 51 mo ago | Seed | 11 | 2020 | — | 18 patents Patents concentrated in computing, sensing & instrumentation | — |
| 13 | Bricklayer AI Developer of an AI agent platform for cybersecurity operations centers | $2M | 10 mo ago | Seed | — | 2023 | Adam Vincent Founder & CEO | — | 1 job opening · 1 award |
| 14 | Two Six Technologies Offering threat detection solutions | $2M | 33 mo ago | Acquired | 650 | 2021 | Joseph Logue CEO | — | 2 job openings · 1 internship · 1 launch |
| 15 | Fend Manufacturer of data diodes for one-way network traffic and security | $1M | 27 mo ago | Acquired | 9 | 2017 | Colin Dunn Founder & CEO | 27 patents Secure one-way hardware communication devices and collapsible protective helmets | — |
| 16 | GroupSense Digital risk protection, dark web monitoring, and threat intelligence services | $675K | 29 mo ago | Acquired | 39 | 2014 | Kurtis Minder CEO & Co-Founder | 4 patents Enterprise data theft detection and remediation systems | — |
| 17 | Ostendio Cloud-based integrated IT compliance management software provider | $382K | 62 mo ago | Series A | 23 23 → 19 (-17%) | 2013 | — | — | — |
| 18 | EYL Quantum security solutions provider for IoT, enhancing data protection | $100K | 118 mo ago | Funding Raised | 22 | 2015 | — | — | — |
Top 12 Cybersecurity companies in Arlington
#1
Series C · Arlington, Virginia · founded 2018 · 75 employees$108Mraised▾
Platform for intrusion detection and prevention. The platform offers data recorder to collect, enrich, store and transmit embedded data for real-time incident response, and analytics, Shift5 Engine which prevents and detect intrusion by leveraging rule based and model based analytics and Shift Guage Cluster which provides a solution to conduct incident response and preventive maintenance.
- Sep 2025Series C$75M
- Jun 2023Series B$33M
- Feb 2022Series B$50M
- Oct 2021Series A$20M
#2
Seed · Arlington, Virginia · founded 2023$2.5Mraised▾
Developer of an AI agent platform for cybersecurity operations centers. The platform allows security analysts to build and manage AI agents. These agents automate repetitive tasks and assist with threat intelligence. The AI agents gather data, analyze vulnerabilities, and generate reports. The platform integrates with existing security tools and requires no coding.
- Oct 2025Seed$5M
- May 2024Seed$2.5M
#3
Series A · Arlington, Virginia · founded 2021$8Mraised▾
Platform offering secure access service edge as a convergence solutions
- Nov 2024Series A$8M
#4
Acquired · Arlington, Virginia · founded 2016 · 32 employees$63Mraised▾
Cloud based data privacy management software provider. The product offered by the company is a cloud privacy management platform that delivers privacy programs at scale, enabling collaboration and leveraging integrations into cloud infrastructure and on-premises and cloud data stores. The features include privacy assessment, dashboards, analytics and reporting, consent and preference management, etc. It provides support to all phases of a privacy management program including collaboration and vendor risk management. It also provides compliances with privacy regulations around the world, including the European General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA).
- Feb 2021Series B$20M
- Jan 2021Series B$19.3M
- Feb 2020Series A$10.6M
- Oct 2018Series A$10M
#5
Acquired · Arlington, Virginia · founded 2008 · 137 employees$96Mraised▾
AI-powered endpoint security solution for threat prevention, detection, and response. It provides comprehensive endpoint protection through AI-driven security analytics, enabling faster threat detection, investigation, and response with a single agent and unified console. The platform offers actionable insights for a proactive defense posture, built on a Search AI Platform. It blocks unknown threats with host-based behavior analytics, prioritizing attacks over alerts using advanced attack discovery. The solution empowers security operations with an AI Assistant, providing deep host context and automated responses. It offers both native and extended protection options, integrating with third-party tools for enhanced visibility and threat hunting. The platform secures various systems, including Windows, macOS, and Linux, with signatureless prevention and behavior analytics. It uncovers hidden threats by analyzing security data, ensuring security across hybrid environments with flexible licensing and no per-endpoint pricing. The solution is a cloud-native endpoint security platform that helps security teams prevent, detect, and respond to threats across their endpoint devices.
- Oct 2016Series C$9.8M
- Jan 2015Series C$30M
- May 2013Series B$27.2M
- Oct 2010Series A$29M
#6
Acqui-Hired · Arlington, Virginia · founded 2011 · 66 employees$56.1Mraised▾
Cybersecurity leader protecting applications, data, and APIs from advanced threats. The company provides cloud-based security solutions, including Web Application Firewall (WAF), Advanced Bot Protection, DDoS Protection, API Security, Client-Side Protection, Account Takeover Protection, and Content Delivery Network (CDN). It safeguards websites, mobile apps, and APIs from sophisticated bot attacks and automated threats. The company offers data security solutions, including data security fabric, data discovery and classification, and data security posture management, ensuring compliance and protecting data at any scale. The company's solutions cater to various industries, offering defense-in-depth security. It provides threat research, learning assets, and a community platform to stay informed on the latest cybersecurity topics. The company focuses on bot management, threat detection, and mitigation technology, offering customizable reports and dashboards.
- Aug 2016Series C$21.2M
- Jul 2015Series B$21M
- Jan 2015Conventional Debt$3M
- Jun 2014Series A$10.1M
#7
Acquired · Arlington, Virginia · founded 2017 · 9 employees$1.1Mraised▾
Manufacturer of data diodes for one-way network traffic and security. The company's hardware transports data using light across optically isolated circuits. This design allows monitoring of network data from protected networks without cyberattack risks. The data diodes facilitate extraction and analysis of data using machine learning.
- May 2024Conventional Debt$150K
- Jul 2023Grant (prize money)$1.4M
- Apr 2022Series A$1.1M
- Apr 2022Conventional Debt—
#8
Acquired · Arlington, Virginia · founded 2021 · 650 employees$2.2Mraised▾
Offering threat detection solutions. It offers technology solutions in cyber, data science, mobile, microelectronics and information operations, providing a full spectrum of products and capabilities to advance the national security mission. The products includes Pulse, IKE™, SIGMA™, TrustedKeep, and others.
- Nov 2023Seed$2.2M
- Feb 2018Seed$636K
#9
Series A · Arlington, Virginia · founded 2017 · 38 employees$13Mraised▾
CROSSBOW provides a security platform that enables to validation of an organization's defenses. The platform enables to easily emulate real-world threats and is accessible through SaaS or on-premise servers. It provides protection against ransomware, phishing, and rouge installed via USB.
- Nov 2021Series A$10M
- Sep 2018Series A$3M
#10
Acquired · Arlington, Virginia · founded 2013 · 238 employees$20.1Mraised▾
Provider of cyber threat intelligence, risk quantification, and security operations platform. The platform enables threat intelligence, security, and risk management teams to be more effective. It operationalizes threat intelligence at the core of security operations. The platform helps quantify cyber risk in financial terms. It also helps prioritize security investments and defensive actions based on business risks. The platform connects threat intelligence, risk quantification, and security operations.
- Jun 2019Series B—
- Dec 2015Series B$16.1M
- Nov 2015Grant (prize money)$24.4K
- Nov 2014Series A$4M
#11
Acquired · Arlington, Virginia · founded 2014 · 39 employees$675Kraised▾
Digital risk protection, dark web monitoring, and threat intelligence services, offering proactive solutions against evolving cyber threats. The company specializes in digital risk protection, brand protection, fraud and cybercrime prevention, and executive protection. Services include election threat protection, dark web monitoring, and tailored threat intelligence. They provide ransomware readiness, negotiation, and third-party risk management. Social media monitoring is also offered to mitigate digital risk. The company delivers actionable intelligence to prepare and respond to attacks, focusing on relevant threats and finished intelligence. They take action on threats through remediation, takedowns, validation, and threat engagement, enhancing business resilience. Reconnaissance maps risks, and threat monitoring provides alerts. The company offers digital risk protection services, dark web solutions, and expert negotiation help.
- Mar 2024Seed$450K
- Aug 2023Seed$225K
#12
Acquired · Arlington, Texas · founded 1994$25Mraised▾
Cross platform directory management and administration. It provides directory administration suite and cross-platform synchronization tools. The solution delivered control and security of active directory for integrity and availability of the enterprise IT infrastructures.
- Jun 1998Series B$7.2M
- Series A—
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Cybersecurity coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Cybersecurity is moving in the United States
A read on the academic research around Cybersecurity — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 3,240 United States-affiliated papers.
- Purdue University West Lafayette85
- Northeastern University82
- Film Independent58
- Georgia Institute of Technology46
- DEVCOM Army Research Laboratory41
- Intrusion detection system94→301
- Anomaly detection30→107
- Key (lock)11→84
- Internet of Things2→61
- Artificial neural network2→57
- Intrusion detection system97→202
- Artificial neural network3→47
- Anomaly detection25→61
- Internet of Things1→33
- Support vector machine8→38
- Key (lock)6→39
- Intrusion detection system13→45
- Exploit9→30
- Malware6→26
- Adversarial system1→19
Where cybersecurity is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing cybersecurity patents in the United States
United States cybersecurity patent filing is accelerating — 237,304 filings from 8,000 assignees (2016–2025), led by IBM, Microsoft, Intel; annual filings 18790→23467.
- IBM27110
- Microsoft22601
- Intel12666
- Google8565
- Qualcomm7612
- Apple6755
- Hewlett Packard Development5761
- Capital One Services4646
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.