Top AI Security Companies Protecting LLMs And AI Agents In 2027
Ten AI security platforms that defend LLM apps and AI agents against prompt injection, tool misuse and data leakage.
Independent rankings of the firms that defend against AI-powered attacks, deepfake fraud and ransomware, plus plain guides for locking down AI agents and your own team. New AI security lists, comparisons and guides appear here as soon as they’re published.
Ten AI security platforms that defend LLM apps and AI agents against prompt injection, tool misuse and data leakage.
AI security covers two jobs: protecting the AI systems your business runs (LLM apps, agents and MCP integrations) from prompt injection, data leakage and excessive permissions, and defending the business against attackers who use AI for phishing, deepfakes and faster exploitation. Most firms on this hub specialize in one side, so start by naming which problem you have.
Attackers clone an executive’s voice or face from public video and recorded calls, then pressure finance or IT staff to approve a payment, reset credentials or share data. The strongest defenses pair detection tools on calls and video with process controls: callback verification, dual approval for payments and a code word for urgent requests.
A penetration test checks your networks, apps and cloud for exploitable flaws. AI red teaming targets the model and agent layer: jailbreaks, prompt injection, data exfiltration through tools and unsafe autonomous actions. If you ship an LLM feature or connect agents to internal systems, you need both.
Our lists are editorial. We compare each firm on specialization, verified certifications, public client work, team depth and how clearly it scopes and prices engagements. Placement is never sold, and any sponsored slot is labeled.
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