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Head-to-head · LLM Evaluation Tools

Promptfoo vs Maxim AI

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score Promptfoo #2 in LLM Evaluation Tools 9.3/10 Free plan Free plan✓ 5 of 6 features Visit Promptfoo
Maxim AI #4 in LLM Evaluation Tools 9.0/10 Free plan · 14-day trial Free planFree trial✓ 6 of 6 features Visit Maxim AI

Promptfoo leads on 0 checks, Maxim AI on 0, and 7 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePromptfoo · 9.3/10
  • Free planboth
  • Free trialonly Maxim AI
  • Most featuresMaxim AI · 6 of 6

Promptfoo scores higher on our rubric for llm evaluation tools: 9.3 against 9.0 out of 10; our editors rank them #2 and #4.

Promptfoo is the better fit for teams needing evaluation plus red teaming. Maxim AI is the better fit for cost-conscious teams building evaluation workflows.

  • Promptfoo fits best

    Teams needing evaluation plus red teaming

  • Maxim AI fits best

    Cost-conscious teams building evaluation workflows

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Side by side

Feature Promptfoo 9.3/10 Visit ↗ Maxim AI 9.0/10 Visit ↗
At a glance
Editor score 9.3 9.0
Ranking #2 in LLM Evaluation Tools #4 in LLM Evaluation Tools
Best for Teams needing evaluation plus red teaming Cost-conscious teams building evaluation workflows
Pricing model Free plan + paid Free plan + paid
Starting price — $29/seat/mo
Free plan ✓ ✓
Free trial — 14 days
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Community, Docs Email, Docs · 24/7
Compliance SOC 2, ISO 27001 SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML
Integrations 12 integrations 12 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Promptfoo 5/6 · Maxim AI 6/6
Custom metrics ✓ ✓
LLM-as-a-judge ✓ ✓
Safety evaluations ✓ ✓
Human review workflows ✓ ✓
Prompt versioning Not checked yet ✓ (best)
CI/CD integration ✓ ✓
Specs
Deployment options Both Both
Our review
Pros
  • Evaluates prompts, models, and RAG pipelines with custom assertions
  • Combines red teaming, vulnerability scanning, and safety evaluations
  • Supports local, self-hosted, cloud, API, and CI/CD workflows
  • Combines prompts, simulations, evaluators, review, observability, and CI/CD
  • Free Developer plan supports up to 3 seats and 10k logs monthly
  • Integrates with OpenAI, Claude, Gemini, LangChain, and LangGraph
Cons
  • Enterprise and On-Premise pricing is custom
  • Advanced collaboration and monitoring features require paid tiers
  • Its broad scope may exceed the needs of teams seeking only prompt comparison
  • Developer plan limits teams to 3 seats and 1 workspace
  • Developer data retention is limited to 3 days
  • Enterprise pricing is custom rather than listed
Our verdict

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 that need to benchmark prompts, models, or RAG…

Read the review →

Maxim AI is an evaluation and observability platform for teams building AI agents and applications. It covers prompt experimentation and comparison, prompt versioning and deployment, agent simulations, automated and human evaluations,…

Read the review →
  1. PromptfooLLM Evaluation Tools 9.3Free plan
  2. Maxim AILLM Evaluation Tools 9.0Free plan · 14-day trial

Strengths and trade-offs

  • Promptfoo — where it wins

    • Evaluates prompts, models, and RAG pipelines with custom assertions
    • Combines red teaming, vulnerability scanning, and safety evaluations
    • Supports local, self-hosted, cloud, API, and CI/CD workflows

    Where it doesn't

    • Enterprise and On-Premise pricing is custom
    • Advanced collaboration and monitoring features require paid tiers
    • Its broad scope may exceed the needs of teams seeking only prompt comparison

  • Maxim AI — where it wins

    • Combines prompts, simulations, evaluators, review, observability, and CI/CD
    • Free Developer plan supports up to 3 seats and 10k logs monthly
    • Integrates with OpenAI, Claude, Gemini, LangChain, and LangGraph

    Where it doesn't

    • Developer plan limits teams to 3 seats and 1 workspace
    • Developer data retention is limited to 3 days
    • Enterprise pricing is custom rather than listed

More comparisons

All LLM evaluation tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update