Top Promptfoo Alternatives for 2026
Promptfoo focuses on red teaming. many teams evaluate alternatives for broader agent coverage, different deployment models, or pricing that fits their scale. Here are the top competitors to consider.
Category: AI Red Teaming & Testing
What is Promptfoo?
Developer-friendly CLI tool for testing, evaluating, and red teaming LLM applications.
GuardionAI
Agent runtime governance — EDR for AI agents. Guardion governs every agent command, tool call, and data access inline: a security gateway, runtime guardrails, DLP, and detection & incident response for AI agents.
Why it's better than Promptfoo
sub-130ms guardrails latency • 96.3 F1 on the Prompt Security Leaderboard with 0.02% false positives • 50M+ agent actions protected per month
garak (NVIDIA)
Generative AI Red-teaming & Assessment Kit, now maintained by NVIDIA. Scans LLMs for hallucinations, data leakage, and prompt injection with a comprehensive probe library.
Patronus AI
Automated evaluation and security testing platform for Large Language Models to catch hallucinations and safety issues.
Giskard (Open Source)
Open-source testing framework dedicated to ML models and LLMs, covering bias, performance, and security flaws.
Frequently asked questions
What is Promptfoo?
Developer-friendly CLI tool for testing, evaluating, and red teaming LLM applications. It is categorized under AI Red Teaming & Testing in the Guardion AI Security Index.
Is Promptfoo open source?
Yes. Promptfoo has an open-source core; pricing model: Open Source / Cloud.
What are the best Promptfoo alternatives?
Teams evaluating Promptfoo most often compare it with garak (NVIDIA), Patronus AI, Giskard (Open Source), and GuardionAI — all listed under AI Red Teaming & Testing.
How does Promptfoo compare to GuardionAI?
Promptfoo focuses on red teaming, while GuardionAI is an agent runtime governance platform ("EDR for AI agents") that governs every agent tool call inline with sub-130ms guardrails latency.