# Promptfoo Guardrails vs Stacklok Enterprise MCP Platform: side-by-side comparison (2026) [Promptfoo Guardrails](https://cybersectools.com/tools/promptfoo-guardrails) is a commercial [LLM guardrails](https://cybersectools.com/categories/llm-guardrails) solution by [Promptfoo](https://cybersectools.com/companies/promptfoo). [Stacklok Enterprise MCP Platform](https://cybersectools.com/tools/stacklok-enterprise-mcp-platform) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [Stacklok](https://cybersectools.com/companies/stacklok). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | Promptfoo Guardrails | Stacklok Enterprise MCP Platform | |---|---|---| | Pricing model | Commercial | Commercial | | Category | LLM Guardrails | Agentic AI Security | | Verified | No | No | | Deployment type | Hybrid | Cloud | | Company size fit | Startup, SMB, Mid-Market, Enterprise | Mid-Market, Enterprise | | Company | Promptfoo | Stacklok | | Headquarters | – | – | ### Use cases and capabilities | | Promptfoo Guardrails | Stacklok Enterprise MCP Platform | |---|---|---| | LLM Guardrails | Yes | – | | LLM Security | Yes | – | | AI Firewall | Yes | – | | Prompt Injection | Yes | – | | GenAI Security | Yes | – | | Red Team | Yes | – | | Generative AI | Yes | Yes | | Continuous Testing | Yes | – | | Adversarial ML | Yes | – | | AI Governance | Yes | – | | Security Policy | – | Yes | | Least Privilege | – | Yes | | Gateway | – | Yes | | MCP Security | – | Yes | ### Core features **Promptfoo Guardrails** 6 features listed. Sign in on the page to see them. **Stacklok Enterprise MCP Platform** 9 features listed. Sign in on the page to see them. ### Integrations **Promptfoo Guardrails** No integrations listed. **Stacklok Enterprise MCP Platform** 3 integrations listed. Sign in on the page to see them. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Promptfoo Guardrails](https://cybersectools.com/tools/promptfoo-guardrails) fits if you need both cloud and on-premises options and you are a startup or a small business. - [Stacklok Enterprise MCP Platform](https://cybersectools.com/tools/stacklok-enterprise-mcp-platform) fits if you want a cloud product. ## Promptfoo Guardrails vs Stacklok Enterprise MCP Platform FAQ Common questions when comparing Promptfoo Guardrails vs Stacklok Enterprise MCP Platform for LLM guardrails. ### What is the difference between Promptfoo Guardrails and Stacklok Enterprise MCP Platform? **Promptfoo Guardrails**: Adaptive LLM guardrails that self-improve via red team feedback loops. Built by Promptfoo. **Stacklok Enterprise MCP Platform**: Secure gateway platform for governing AI agent MCP server access in enterprises. Built by Stacklok. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Promptfoo Guardrails and Stacklok Enterprise MCP Platform? **Promptfoo Guardrails** is made by Promptfoo. **Stacklok Enterprise MCP Platform** is made by Stacklok. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Promptfoo Guardrails a good alternative to Stacklok Enterprise MCP Platform? In part. Promptfoo Guardrails and Stacklok Enterprise MCP Platform are not in the same category on CybersecTools. Both cover Generative AI. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Promptfoo Guardrails vs RealmGuard](https://cybersectools.com/compare/promptfoo-guardrails-vs-realm-labs-platform) - [Promptfoo Guardrails vs Confident Security](https://cybersectools.com/compare/confident-security-vs-promptfoo-guardrails) - [Promptfoo Guardrails vs PointGuard AI Intelligent Guardrails](https://cybersectools.com/compare/pointguard-ai-intelligent-guardrails-vs-promptfoo-guardrails) - [Stacklok Enterprise MCP Platform vs RealmGuard](https://cybersectools.com/compare/realm-labs-platform-vs-stacklok-enterprise-mcp-platform) - [Stacklok Enterprise MCP Platform vs Confident Security](https://cybersectools.com/compare/confident-security-vs-stacklok-enterprise-mcp-platform) - [Stacklok Enterprise MCP Platform vs PointGuard AI Intelligent Guardrails](https://cybersectools.com/compare/pointguard-ai-intelligent-guardrails-vs-stacklok-enterprise-mcp-platform) ## Alternatives to each - [See all Promptfoo Guardrails alternatives](https://cybersectools.com/alternatives/promptfoo-guardrails) - [See all Stacklok Enterprise MCP Platform alternatives](https://cybersectools.com/alternatives/stacklok-enterprise-mcp-platform) --- Source: https://cybersectools.com/compare/promptfoo-guardrails-vs-stacklok-enterprise-mcp-platform For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/promptfoo-guardrails.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Promptfoo Guardrails and Stacklok Enterprise MCP Platform: 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