Advanced Adversarial Testing for the AI-Adversary Era
We Validate Every
Layer of Your Applications. Cloud Environments. Networks. AI/LLM Systems. Hardware & Devices. OT/ICS Environments. Facilities.
We combine elite offensive security experts with emerging technologies, including AI, automation, and advanced analytics, to continuously uncover and eliminate hidden risk before attackers can exploit it.
Trusted Across Critical Industries
What Sets OnDefend Apart
To stop advanced, persistent adversaries, you need a team that can act like one.
Security Testing Services
To stop advanced, persistent adversaries, you need a team that can act like one.
Network Penetration Testing
We identify exploitable vulnerabilities and attack paths across internal, external, and wireless networks to assess network security risk.
Application Penetration Testing
We assess web, mobile, desktop, and API applications to uncover exploitable vulnerabilities, business logic flaws, and attack paths through dynamic and static testing.
Cloud Penetration Testing
We assess cloud environments to uncover misconfigurations, identity weaknesses, and attack paths across AWS, Azure, GCP, and other cloud platforms.
AI and LLM Penetration Testing
We assess AI and LLM systems to uncover weaknesses that could lead to manipulation, data leakage, or unsafe behavior.
Hardware & Integrated Systems Testing
We assess devices, firmware, and supply-chain integrity to uncover hidden vulnerabilities, undocumented components, and unauthorized communications that lead to compromise.
Red Teaming Services
We emulate determined adversaries to demonstrate how attackers penetrate, persist, and achieve real-world impact across people, process, and technology.
Purple Teaming Services
We run collaborative attack simulations that unite offensive and defensive teams to identify protection, detection, and response gaps, tune defenses, and measurably improve resilience.
Social Engineering Testing
We conduct realistic phishing, vishing, smishing, and physical deception testing to evaluate how people and processes respond to human-focused attack techniques.
Continuous Attack Path Elimination.
The Next Evolution of Penetration Testing for the Age of AI-Powered Attackers.
Attack Automation
Automates offensive testing at scale.
Attack Path Intelligence
Identifies possible attack paths.
Operator Guidance
BlindSPOT directs the team where to focus.
Attack Path Validation
Validates the paths that only humans can.
Remediation Acceleration
Prioritizes fixes that collapse paths.
Compounding Intelligence
Team feeds all data back into BlindSPOT.
What Our Clients Have to Say
We Give You the Competitive Advantage
By combining elite red team operators, threat intelligence, and AI-powered capabilities we ensure you have a decisive advantage over adversaries.
Elite Red Team Operators
Senior offensive security engineers with decades of real-world adversary experience across enterprise, government, and critical infrastructure, test your environment to uncover attack paths that traditional testing misses.
Real-World Attack Behavior
Our team emulates real-world attack behavior that goes beyond known techniques and playbooks, incorporating creativity and adaptation to show how compromise actually unfolds.
Proprietary Automation & AI Technology
Our automation and AI accelerate testing, correlate signals, and scale complex validation without sacrificing depth, delivering the efficiencies modern security programs expect.
Commercial & Proprietary Intelligence
We fuse commercial intelligence with our proprietary research to identify emerging exposures, shifting attack paths, and zero-day indicators.
Continuous Validation & Improvements
Our Continuous Attack Path Elimination (CAPE) program identifies drift, new weaknesses, and evolving attack paths as your systems change, ensuring your defenses stay aligned with real adversary behavior.
News and Insights
Stay ahead of emerging threats with research and guidance from our offensive security team.
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10 Years of OnDefend: CEO Chris Freedman on a Decade of Building in Cybersecurity
Ten years ago, OnDefend made a bet that most cybersecurity startups don’t – to build the company without outside investors calling the shots. A decade, a shelf of awards, and a client list that includes some of the country’s most successful enterprises later, that bet has paid off.
Read More -
OnDefend Ranks No. 2 on Business Journal’s 2026 Fast 50 List
OnDefend posted average annual revenue growth of 214.84% from 2023 to 2025, one of the highest growth rates on this year’s list, landing at the number two spot.
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What AI Changes About Source Code Penetration Testing
Source code penetration testing has always been the most thorough form of security testing there is, and candidly also the slowest. That’s why many organizations save it for their highest-stakes systems instead of running it everywhere, but that’s starting to change.
Read More
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