PromptArmor

PromptArmor is an AI risk-intelligence platform focused on the risk third-party vendors introduce by adding AI features. It scans vendors for new AI capabilities and policy changes and tests them for indirect prompt-injection vulnerabilities, giving security and GRC teams evidence for third-party AI risk assessments. Founded in 2023 in San Francisco with around $3M in disclosed funding, it is a very early-stage, research-driven specialist rather than a broad platform.

PromptArmor addresses a specific angle of AI security: the risk that comes from third-party vendors and SaaS applications quietly shipping AI features. As tools across an organization's stack add AI capabilities -- often changing how data is processed and where it flows -- security and GRC teams struggle to keep track. PromptArmor provides visibility by scanning vendors for new AI features and policy changes and by testing them for indirect prompt-injection vulnerabilities, giving teams an evidence base for third-party AI risk assessments. The company is also an active security-research shop. Its researchers have published notable findings, including a widely covered prompt-injection issue in an AI assistant that could be abused to exfiltrate data, and it contributes to academic and benchmark work on prompt-injection detection. This research posture reinforces its positioning as an AI risk-intelligence provider rather than a runtime guardrail vendor. PromptArmor was founded in 2023 by Vikram Jayanthi and Shankar Krishnan and is based in San Francisco. It is a very early-stage, independent company with modest disclosed funding (around $3M). Buyers should treat it accordingly: the research credibility is real, but this is a small, young vendor, and its scope is narrower than broad AI-security platforms.