Promptfoo vs Cranium AI

Both compete in Red-Teaming & AI Security. Promptfoo positions itself as “Open-source tool for evaluating and red-teaming LLM apps, agents, and RAG systems”, while Cranium AIleads with “End-to-end AI security and governance platform to discover, monitor, red-team and prove enterprise AI”. The table below compares what each publishes.

Where Promptfoo pulls ahead

Developer teams wanting free, open-source, CI/CD-integrated evaluation and red teaming of LLM apps

Where Cranium AI pulls ahead

Publishes support for EU AI Act, NIST AI RMF, ISO/IEC 42001, which Promptfoo does not. Enterprises that need to secure, red-team, and prove governance across internal and third-party AI in one platform

	Promptfoo	Cranium AI
Positioning	Open-source tool for evaluating and red-teaming LLM apps, agents, and RAG systems	End-to-end AI security and governance platform to discover, monitor, red-team and prove enterprise AI
Category	Red-Teaming & AI Security	Red-Teaming & AI Security
Frameworks	None published	EU AI Act, NIST AI RMF, ISO/IEC 42001
Deployment	Open-source, SaaS, API	SaaS, Cloud, API
Built for	Data Science / ML, Security	Security, Risk, GRC, Compliance, Data Science / ML
Founded	2023	2023
Headquarters	USA	Short Hills, New Jersey, USA
Ownership	Acquired by OpenAI (2026); previously VC-backed	Private (venture-backed; spun out of KPMG Studio)
Funding	~$23.4M raised prior to acquisition; $5M seed (a16z, 2024) and $18.4M Series A led by Insight Partners (2025)	~$32M total; $25M Series A (Oct 2023) led by Titanium/Telstra Ventures with KPMG and SYN Ventures
Pricing	Open-source (MIT license), free; paid enterprise platform	Enterprise subscription; quote-based (annual subscription also listed on Azure/Microsoft marketplaces)
Key capabilities	LLM evaluation and benchmarking Automated red teaming and vulnerability scanning Declarative test configs Prompt and model comparison CI/CD integration Local/self-hosted execution	AI asset discovery and AI Bill of Materials (AI-BOM) Shadow AI detection Continuous behavioral monitoring and observability Cranium Arena red-teaming (MITRE ATLAS, OWASP) Policy governance mapped to NIST AI RMF, EU AI Act and ISO 42001 Runtime threat detection and remediation
Integrations	OpenAI, Anthropic, Google Gemini, DeepSeek, CI/CD pipelines, GitHub	Weights & Biases, Microsoft Azure / Azure Marketplace, MITRE ATLAS, OWASP
Notable customers	OpenAI, Anthropic, Fortune 500 enterprises	None published
Best for	Developer teams wanting free, open-source, CI/CD-integrated evaluation and red teaming of LLM apps	Enterprises that need to secure, red-team, and prove governance across internal and third-party AI in one platform
Limitations	Developer-oriented and requires engineering effort to configure; broader governance/compliance features live in the paid enterprise tier.	Security- and red-teaming-first orientation means it emphasizes threat testing and monitoring over deep policy/GRC workflow; enterprise pricing is not publicly listed; still a relatively young company with limited publicly named customers.

Which should you shortlist?

Choose Promptfoo if developer teams wanting free, open-source, CI/CD-integrated evaluation and red teaming of LLM apps

Choose Cranium AI if enterprises that need to secure, red-team, and prove governance across internal and third-party AI in one platform

Neither is a substitute for a governance program. Whichever you pick, you still need people who can define the policies the tool enforces.

Full Promptfoo profile →Full Cranium AI profile →

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