AgentClash vs Promptfoo

AgentClash9.3Visit Promptfoo8.5Visit

Higher score AgentClash #2 in AI Agent Evaluation Tools 9.3/10 Free plan Free plan✓ 4 of 4 features Visit AgentClash

vs

Promptfoo #8 in AI Agent Evaluation Tools 8.5/10 Free plan Free plan✓ 0 of 4 features Visit Promptfoo

• AgentClash fits best

  Teams testing agents in realistic sandboxes

• Promptfoo fits best

  Teams needing evaluation plus automated red teaming

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Side by side

Feature	AgentClash 9.3/10 Visit ↗	Promptfoo 8.5/10 Visit ↗
At a glance
Editor score	9.3	8.5
Ranking	#2 in AI Agent Evaluation Tools	#8 in AI Agent Evaluation Tools
Best for	Teams testing agents in realistic sandboxes	Teams needing evaluation plus automated red teaming
Pricing model	Free plan + paid	Free plan + paid
Starting price	$39/mo	—
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web	Web
Support	Email, Community, Docs	Community, Docs
Compliance	SSO/SAML	SOC 2, ISO 27001
Integrations	10 integrations	12 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features AgentClash 4/4 · Promptfoo 0/4
Tool-call checks	✓ (best)	Not checked yet
Trace ingestion	✓ (best)	Not checked yet
Safety evaluations	✓ (best)	Not checked yet
Regression runs	✓ (best)	Not checked yet
Specs
Evaluation methods	Hybrid	Not checked yet
SDK language support	Not checked yet	Not checked yet
Dataset limit	Not checked yet	Not checked yet
Our review
Pros	Head-to-head evaluations with shared tasks, tools, budgets, and starting states Isolated microVMs, replayable traces, and detailed tool-call assertions CI regression gates plus safety testing for leaks, egress, and adversarial prompts	Covers prompt, model, RAG, safety, and vulnerability evaluations Supports custom metrics, human review, and LLM-as-a-judge grading Runs locally, in CI/CD, through APIs, or in managed cloud deployments
Cons	Free requires your own LLM API key and E2B sandbox token Enterprise pricing uses custom MSA and billing terms The official site lists the product as beta	Enterprise and On-Premise pricing is custom Advanced collaboration and monitoring require paid tiers Its broad evaluation scope may exceed simple testing needs
Our verdict	AgentClash is an open-source evaluation tool for teams developing and releasing AI agents for coding, research, operations, support, and other workloads. It runs agents against the same tasks, tools, constraints, and time budgets, then… Read the review →	Promptfoo is an open-source CLI and library for evaluating, testing, and red-teaming large-language-model applications. It is designed for developers and teams building AI applications who need to benchmark prompts, models, and RAG… Read the review →

Strengths and trade-offs

• AgentClash — where it wins

  • Head-to-head evaluations with shared tasks, tools, budgets, and starting states
  • Isolated microVMs, replayable traces, and detailed tool-call assertions
  • CI regression gates plus safety testing for leaks, egress, and adversarial prompts

  Where it doesn't

  • Free requires your own LLM API key and E2B sandbox token
  • Enterprise pricing uses custom MSA and billing terms
  • The official site lists the product as beta

• Promptfoo — where it wins

  • Covers prompt, model, RAG, safety, and vulnerability evaluations
  • Supports custom metrics, human review, and LLM-as-a-judge grading
  • Runs locally, in CI/CD, through APIs, or in managed cloud deployments

  Where it doesn't

  • Enterprise and On-Premise pricing is custom
  • Advanced collaboration and monitoring require paid tiers
  • Its broad evaluation scope may exceed simple testing needs

• AgentClash9.3/10 · Free plan

  AgentClash tests agent behavior with replayable evidence, sandboxing, safety checks, and CI gates.

  Visit AgentClashFull verdict →
• Promptfoo8.5/10 · Free plan

  A flexible evaluator for teams that need testing, red teaming, and CI/CD controls.

  Visit PromptfooFull verdict →