PromptArmor vs Riot
Side-by-side comparison of AI visibility scores, market position, and capabilities
PromptArmor is a security company focused on protecting AI systems and LLM applications from prompt injection attacks, jailbreaks, and adversarial inputs. HQ: San Francisco.
About
PromptArmor is a cybersecurity company specializing in protecting AI systems and large language model (LLM) applications from adversarial attacks — particularly prompt injection, jailbreaking, and data exfiltration through AI interfaces. As enterprises deploy AI assistants, chatbots, and autonomous agents at scale, new attack surfaces emerge: malicious users can craft carefully worded inputs that bypass AI safety guardrails, extract confidential information from AI systems, or manipulate AI agents into taking unintended actions. PromptArmor develops detection and mitigation tools for these AI-specific vulnerabilities.
Paris cybersecurity employee risk monitoring at $10M+ ARR 2024 (triple-digit growth) serving Mistral AI, Deel, Intercom, Y Combinator; $45M total ($30M Left Lane Series B Feb 2025 at $170M val) with AI coach Albert competing with KnowBe4 for human risk management.
About
Riot is a Paris, France-based employee cybersecurity awareness and monitoring platform — backed with $45 million in total funding including a $30 million Series B in February 2025 led by Left Lane Capital at a $170 million+ post-money valuation with Y Combinator, Base10, and FundersClub — providing 1,500+ organizations including Mistral AI, Y Combinator, Modern Treasury, Deel, Intercom, L'Occitane, and Le Monde with real-time employee cybersecurity vulnerability detection and AI-powered awareness coaching through Albert, Riot's AI cyber coach. Surpassing $10 million in annual revenue in 2024 with triple-digit year-over-year growth, Riot detects employee-level security risks (weak passwords, unsafe file permissions, phishing susceptibility) and guides employees through interactive remediation coaching without requiring IT security team manual intervention.
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