This chapter provides a detailed analysis of the commercial landscape for agentic AI security, a market rapidly bifurcating to address the dual challenges of this transformative technology. We examine this ecosystem through two critical lenses: first, the structural duality of established technology giants versus agile startups, and second, the philosophical duality of “AI Agents for Security” (using autonomous agents to defend enterprises) versus “Security for AI Agents” (protecting the agents themselves). The chapter offers a detailed, tiered analysis of the key commercial players, from hyperscalers like Microsoft, Google, and Amazon to security incumbents and a vibrant ecosystem of specialized startups including Zenity, Reco, Astrix, Aembit, and Splx. It explores the novel technologies being deployed to counter emergent threats like memory poisoning and sophisticated prompt injection, and it dissects the business models, market trends, and investment landscape shaping this critical sector. By synthesizing real-world examples and forward-looking analysis, this chapter serves as an essential guide for security professionals, AI developers, and strategic leaders navigating the opportunities and risks of the burgeoning agentic AI economy.