# HiddenLayer AI Runtime Security vs Promptfoo MCP Proxy: side-by-side comparison (2026) [HiddenLayer AI Runtime Security](https://cybersectools.com/tools/hiddenlayer-ai-detection-and-response) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [HiddenLayer](https://cybersectools.com/companies/hiddenlayer). [Promptfoo MCP Proxy](https://cybersectools.com/tools/promptfoo-mcp-proxy) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [Promptfoo](https://cybersectools.com/companies/promptfoo). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [HiddenLayer AI Runtime Security](https://cybersectools.com/tools/hiddenlayer-ai-detection-and-response) Best for: Teams building their own AI apps and agents It does a different job from the endpoint and identity picks, because it covers the agents your own developers ship, from model scanning in the build pipeline to runtime defense and red teaming. That suits mid-market and enterprise teams with an active AI build program. If most of your agents are bought rather than built, weigh whether you need this layer yet. From [Best Agentic AI Security Solutions for Business](https://cybersectools.com/shortlists/best-agentic-ai-security-solutions), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). Need the answer fast? [Best Agentic AI Security Solutions for Business](https://cybersectools.com/shortlists/best-agentic-ai-security-solutions) picks CrowdStrike Falcon Guardian, Rubrik Agent Cloud, Silverfort AI Agent Security and 5 more. ## Side-by-side comparison | | HiddenLayer AI Runtime Security | Promptfoo MCP Proxy | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Agentic AI Security | Agentic AI Security | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise | | Company | HiddenLayer | Promptfoo | | Headquarters | – | – | ### Use cases and capabilities | | HiddenLayer AI Runtime Security | Promptfoo MCP Proxy | |---|---|---| | PII | Yes | Yes | | MCP Security | – | Yes | | Agentic AI Security | – | Yes | | AI Gateway | – | Yes | | AI Observability | – | Yes | | Proxy | – | Yes | | Whitelist | – | Yes | | Sensitive Data | – | Yes | | Log Management | – | Yes | | AI Governance | – | Yes | ### Core features **HiddenLayer AI Runtime Security** 10 features listed. Sign in on the page to see them. **Promptfoo MCP Proxy** 6 features listed. Sign in on the page to see them. ### Integrations **HiddenLayer AI Runtime Security** 18 integrations listed. Sign in on the page to see them. **Promptfoo MCP Proxy** 2 integrations listed. Sign in on the page to see them. ## HiddenLayer AI Runtime Security vs Promptfoo MCP Proxy FAQ Common questions when comparing HiddenLayer AI Runtime Security vs Promptfoo MCP Proxy for agentic AI security. ### What is the difference between HiddenLayer AI Runtime Security and Promptfoo MCP Proxy? **HiddenLayer AI Runtime Security**: Real-time detection & response for agentic and generative AI applications. Built by HiddenLayer. **Promptfoo MCP Proxy**: Proxy layer for controlling and monitoring MCP server access in AI apps. Built by Promptfoo. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes HiddenLayer AI Runtime Security and Promptfoo MCP Proxy? **HiddenLayer AI Runtime Security** is made by HiddenLayer. **Promptfoo MCP Proxy** is made by Promptfoo. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is HiddenLayer AI Runtime Security a good alternative to Promptfoo MCP Proxy? Often, yes. HiddenLayer AI Runtime Security and Promptfoo MCP Proxy are both Agentic AI Security products, and both cover PII. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [HiddenLayer AI Runtime Security vs Onyx Platform](https://cybersectools.com/compare/hiddenlayer-ai-detection-and-response-vs-onyx-platform) - [HiddenLayer AI Runtime Security vs Barndoor AI Gateway](https://cybersectools.com/compare/barndoor-ai-gateway-vs-hiddenlayer-ai-detection-and-response) - [HiddenLayer AI Runtime Security vs Lunar.dev MCP Gateway (MCPX)](https://cybersectools.com/compare/hiddenlayer-ai-detection-and-response-vs-lunardev-mcp-gateway-mcpx) - [Promptfoo MCP Proxy vs Onyx Platform](https://cybersectools.com/compare/onyx-platform-vs-promptfoo-mcp-proxy) - [Promptfoo MCP Proxy vs Barndoor AI Gateway](https://cybersectools.com/compare/barndoor-ai-gateway-vs-promptfoo-mcp-proxy) - [Promptfoo MCP Proxy vs Lunar.dev MCP Gateway (MCPX)](https://cybersectools.com/compare/lunardev-mcp-gateway-mcpx-vs-promptfoo-mcp-proxy) ## Alternatives to each - [See all HiddenLayer AI Runtime Security alternatives](https://cybersectools.com/alternatives/hiddenlayer-ai-detection-and-response) - [See all Promptfoo MCP Proxy alternatives](https://cybersectools.com/alternatives/promptfoo-mcp-proxy) --- Source: https://cybersectools.com/compare/hiddenlayer-ai-detection-and-response-vs-promptfoo-mcp-proxy For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/hiddenlayer-ai-detection-and-response.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on HiddenLayer AI Runtime Security and Promptfoo MCP Proxy: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md