Best AI red teaming and LLM security testing tool

Combined ranking

1. 1
   Promptfoo—15 pts

   GPT #1Claude #1Gemini #1

   Best overall mix of broad attack coverage, agent/RAG testing, configurable multi-turn strategies, CI/CD automation, extensibility, and accessible open-source tooling

   Claude The de facto open-source standard for LLM red teaming — huge attack/plugin library (prompt injection, jailbreaks, PII leaks, agent-specific exploits), config-as-code that drops into CI/CD, active community, and a smooth path from free local scans to enterprise reporting

   Gemini Leading CI/CD integration, support for over 50 automated test types, and high customization make it the developer standard for continuous LLM security evaluation.

   To stay #1

   per GPT Make advanced red-team generation fully local and open-source instead of relying partly on hosted services

   per Claude Deeper runtime/production attack simulation for deployed multi-agent systems, not just pre-deployment test suites

   per Gemini Needs better out-of-the-box UI-based configuration and visualization to make it accessible to non-developer security teams.

2. 2
   PPyRIT—9 pts

   GPT #4Claude #2Gemini #3

   Battle-proven by Microsoft's own AI Red Team across 100+ genAI products, flexible Python orchestration of multi-turn and multi-modal attacks, strong converter/scorer architecture for custom adversarial campaigns

   Gemini Designed specifically by Microsoft for executing advanced multi-turn adversarial tactics like crescendo attacks across complex agent configurations.

   GPT Highly flexible, model-agnostic framework for orchestrating multi-turn and multimodal attacks, custom targets, converters, scorers, and human-led security research

   To rank higher

   per GPT Add a polished turnkey interface and simpler production CI workflow

   per Claude Lower the engineering barrier — it's a framework not a product, so teams without dedicated red-team engineers struggle to operationalize it

   per Gemini Setting it up has a steep learning curve and demands heavy manual scripting compared to standard CLI scanners.

3. 3
   GGarak—8 pts

   GPT #5Claude #3Gemini #2

   An incredibly comprehensive open-source CLI scanner with a large, active registry of specialized probing modules for rapid prompt injection and data leakage discovery.

   Claude The broadest ready-made probe library for LLM vulnerability scanning (hallucination, data leakage, jailbreaks, toxicity), simple one-command scans, research-grade rigor and free

   GPT Mature open-source LLM vulnerability scanner with a large probe ecosystem, reproducible testing, broad model support, and strong value for baseline security assessments

   To rank higher

   per GPT Expand beyond model-centric probes into stateful end-to-end agent, tool, and RAG exploitation

   per Claude Modernize reporting and remediation guidance — findings are raw and researcher-oriented, needing translation before security teams can act

   per Gemini Lacks robust native support for complex multi-turn stateful conversations and multi-modal inputs.

4. 4
   MMindgard—8 pts

   GPT #2Claude #4Gemini #4

   Strongest enterprise offensive-security platform for adaptive agent attacks, infrastructure reconnaissance, multimodal testing, exploit validation, and compliance-ready reporting

   Claude Leading commercial continuous automated red teaming (DAST-for-AI), attacks deployed models and agents at runtime rather than just prompts, strong enterprise compliance mapping (MITRE ATLAS, OWASP LLM Top 10)

   Gemini Enterprise-ready commercial platform combining automated threat simulation with live guardrails and runtime LLM security monitoring.

   To rank higher

   per GPT Offer transparent self-serve pricing and a meaningful community edition

   per Claude More transparent pricing and a self-serve tier so smaller teams can adopt without an enterprise sales cycle

   per Gemini Needs a simplified self-service tier and open-source integrations to appeal to smaller engineering teams.

5. 5
   GGiskard—4 pts

   GPT #3Claude —Gemini #5

   Excellent automated scans for agents and RAG systems, strong hallucination and business-risk testing, actionable reports, and an approachable SDK-plus-dashboard workflow

   Gemini Strong focus on scanning business logic alignment, hallucinations, and biases alongside security vulnerabilities for LLM agents.

   To rank higher

   per GPT Deepen adaptive multi-step exploitation of tool-using agents

   per Gemini Needs to expand its repository of automated adversarial jailbreak vectors to match dedicated security-first tools.

6. 6
   SSplxAI—1 pts

   GPT —Claude #5Gemini —

   Purpose-built automated pentesting for conversational AI and agentic apps, simulates thousands of domain-specific attack scenarios pre- and post-deployment, fast time-to-value with remediation suggestions

   To rank higher

   per Claude Broader coverage beyond chat/agent interfaces into model-supply-chain and infrastructure-level AI attack surface

Just missed the top 5

By model

Tracked by ModelsAgree · rank 1 = 5 pts … rank 5 = 1 pt · re-polled continuously