The Best LLM Evaluation Tools in 2026
We researched LLM evaluation tools through official websites, including pricing pages, plan tables, and product documentation. Rankings reflect each product’s fit for testing and validating language-model applications, value for money, and verified evaluation, benchmarking, safety, and reliability features in this category.
Our top picks
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Top ranked
DeepEval#1 of 299.4/10A broad open-source toolkit for evaluating LLM apps, agents, RAG pipelines, and chatbots.
Free plan
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Runner-up
Promptfoo#2 of 299.3/10A broad evaluation toolkit for teams that need testing, security scans, and CI/CD gates.
Free plan
-
Top-ranked free plan
Galileo#3 of 299.1/10A mature evaluation platform spanning offline testing, production tracing, and runtime controls.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 29 tools, best first
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Best forTeams wanting broad open-source LLM evaluation
A broad open-source toolkit for evaluating LLM apps, agents, RAG pipelines, and chatbots.
- Prompt versioning
- CI/CD integration
- Human review workflows
9.4/10★★★★★Visit DeepEval -
Best forTeams needing evaluation plus red teaming
A broad evaluation toolkit for teams that need testing, security scans, and CI/CD gates.
- CI/CD integration
- Human review workflows
- Custom metrics
9.3/10★★★★★Visit Promptfoo -
Best forOrganizations needing mature evaluation and guardrails
A mature evaluation platform spanning offline testing, production tracing, and runtime controls.
- Prompt versioning
- CI/CD integration
- Human review workflows
9.1/10★★★★★Visit Galileo -
Best forCost-conscious teams building evaluation workflows
A broad evaluation workflow with a free plan and $29-per-seat Professional tier.
- Prompt versioning
- CI/CD integration
- Human review workflows
Free plan · 14-day trial Our Maxim AI verdict → Visit Maxim AIFor vendors Sponsor this spot · #4 · $69/mo →9.0/10★★★★☆Visit Maxim AI -
Best forTeams combining evaluations with production tracing
A broad evaluation and tracing platform with a free tier and $249/month Pro plan.
- Prompt versioning
- CI/CD integration
- Human review workflows
8.9/10★★★★☆Visit Braintrust -
Best forTeams needing testing, monitoring, and safety review
A broad evaluation and monitoring platform with a free entry point and costly paid tiers.
- Prompt versioning
- CI/CD integration
- Human review workflows
8.8/10★★★★☆Visit Confident AI -
Best forTeams focused on experiments and prompt lifecycle
A broad toolkit for evaluating prompts, experiments, and production LLM applications.
- Prompt versioning
- CI/CD integration
- Human review workflows
8.7/10★★★★☆Visit Parea AI -
Best forOpen-source RAG and safety evaluation teams
Open-source LLM and RAG evaluation with enterprise security and review workflows.
- CI/CD integration
- Human review workflows
- Custom metrics
8.6/10★★★★☆Visit Giskard -
Best forResearchers needing many composable evaluations
A composable, self-hosted evaluation framework for researchers with broad testing needs.
- CI/CD integration
- Human review workflows
- Custom metrics
8.5/10★★★★☆Visit Inspect AI -
Best forTeams evaluating traced RAG and agent applications
A self-hosted toolkit for tracing, evaluating, and comparing LLM applications.
- Human review workflows
- Custom metrics
- Safety evaluations
8.4/10★★★★☆Visit TruLens -
Best forRAG teams wanting open-source evaluation basics
A flexible, self-hosted toolkit for RAG evaluation, test data, and CI workflows.
- Prompt versioning
- CI/CD integration
- Custom metrics
8.3/10★★★★☆Visit Ragas -
Best forBenchmarking model capability across many dimensions
A broad, configurable toolkit for comparing model capability across key evaluation dimensions.
- Human review workflows
- Custom metrics
- Safety evaluations
8.2/10★★★★☆Visit OpenCompass -
Best forStandardized academic and safety benchmarking
Open-source benchmarking for standardized, safety-focused model comparisons.
- Human review workflows
- Custom metrics
- Safety evaluations
8.1/10★★★★☆Visit HELM -
Best forOpenAI-centric custom benchmark evaluation
A free, OpenAI-centric evaluation framework for repeatable benchmark and custom tests.
- Custom metrics
- Safety evaluations
- LLM-as-a-judge
7.9/10★★★★☆Visit OpenAI Evals -
Best forSecurity teams testing LLM attack resistance
A focused, free toolkit for adversarial LLM security and safety testing.
- Custom metrics
- Safety evaluations
- LLM-as-a-judge
7.8/10★★★★☆Visit garak -
Best forRed teams running configurable AI attacks
A configurable red-team toolkit for assessing generative AI security risks.
- CI/CD integration
- Custom metrics
- Safety evaluations
7.7/10★★★★☆Visit PyRIT -
Best forResearchers benchmarking harmful model behavior
A focused research framework for measuring harmful-model behavior and attack success.
- Safety evaluations
- LLM-as-a-judge
7.6/10★★★★☆Visit HarmBench -
Best forFresh, contamination-resistant model comparisons
An open-source benchmark for objective, frequently refreshed model comparisons.
7.5/10★★★★☆Visit LiveBench -
Best forAcademic benchmark evaluation of language models
A broad, research-focused harness for repeatable benchmark evaluation across local and API models.
- Custom metrics
- Safety evaluations
7.4/10★★★★☆Visit EleutherAI -
Best forResearchers needing flexible multi-backend benchmarks
An open-source evaluator for custom benchmarks, metrics, judges, and multi-backend models.
- Custom metrics
- LLM-as-a-judge
7.3/10★★★★☆Visit Lighteval -
Best forEvaluating interactive LLM agents
A self-hosted benchmark for multi-turn agent evaluation across eight interactive environments.
7.2/10★★★★☆Visit AgentBench -
Best forDeep diagnostic evaluation of RAG systems
A focused, self-hosted toolkit for detailed RAG retrieval and generation diagnostics.
- LLM-as-a-judge
7.1/10★★★★☆Visit RAGChecker -
Best forResearchers measuring RAG answer quality statistically
A focused RAG evaluation framework for statistical quality measurement and local execution.
- LLM-as-a-judge
7.0/10★★★★☆Visit ARES -
Best forPublic, human-driven model comparisons
A free public arena for human-voted, head-to-head AI model comparisons.
- Human review workflows
- Safety evaluations
6.9/10★★★☆☆Visit Arena -
Best forEvaluating coding agents on real GitHub issues
A focused open-source harness for evaluating coding agents against real GitHub issues.
6.8/10★★★☆☆Visit SWE-bench -
Best forBenchmarking generated code correctness and efficiency
A focused toolkit for benchmarking generated code correctness, efficiency, and pass rates.
6.7/10★★★☆☆Visit EvalPlus -
Best forSafety researchers studying trust and robustness
A safety-focused research toolkit with broad evaluations and self-hosted execution.
- Safety evaluations
6.6/10★★★☆☆Visit DecodingTrust -
Best forResearchers evaluating web-browsing agents
A focused environment for evaluating web-browsing agents on realistic interactive tasks.
6.5/10★★★☆☆Visit WebArena -
Best forKubernetes security benchmark checks
A focused, free Kubernetes security checker—not an LLM evaluation tool.
3.5/10★★☆☆☆Visit kube-bench
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Deployment options | Custom metrics | LLM-as-a-judge | Safety evaluations | Score |
|---|---|---|---|---|---|---|---|---|
| 1 | DeepEval | Yes | Free | Both | Yes | Yes | Yes | 9.4 |
| 2 | Promptfoo | Yes | Both | Yes | Yes | Yes | 9.3 | |
| 3 | Galileo | Yes | $100/mo | Both | Yes | Yes | Yes | 9.1 |
| 4 | Maxim AI | Yes | $29/seat/mo | Both | Yes | Yes | Yes | 9.0 |
| 5 | Braintrust | Yes | $249/mo | Both | Yes | Yes | Yes | 8.9 |
| 6 | Confident AI | Yes | $200/mo | Both | Yes | Yes | Yes | 8.8 |
| 7 | Parea AI | Yes | Both | Yes | Yes | Yes | 8.7 | |
| 8 | Giskard | Yes | Both | Yes | Yes | Yes | 8.6 | |
| 9 | Inspect AI | Free | Self-hosted | Yes | Yes | Yes | 8.5 | |
| 10 | TruLens | Free | Self-hosted | Yes | Yes | Yes | 8.4 | |
| 11 | Ragas | Yes | Free | Self-hosted | Yes | Yes | 8.3 | |
| 12 | OpenCompass | Yes | Free | Self-hosted | Yes | Yes | Yes | 8.2 |
| 13 | HELM | Free | Self-hosted | Yes | Yes | Yes | 8.1 | |
| 14 | OpenAI Evals | Yes | Free | Both | Yes | Yes | Yes | 7.9 |
| 15 | garak | Yes | Free | Self-hosted | Yes | Yes | Yes | 7.8 |
| 16 | PyRIT | Free | Both | Yes | Yes | Yes | 7.7 | |
| 17 | HarmBench | Yes | Free | Self-hosted | Yes | Yes | 7.6 | |
| 18 | LiveBench | Free | Both | No | 7.5 | |||
| 19 | LM Evaluation Harness | Free | Self-hosted | Yes | Yes | 7.4 | ||
| 20 | Lighteval | Free | Self-hosted | Yes | Yes | 7.3 | ||
| 21 | AgentBench | Yes | Free | Self-hosted | 7.2 | |||
| 22 | RAGChecker | Free | Self-hosted | No | Yes | 7.1 | ||
| 23 | ARES | Free | Self-hosted | Yes | 7.0 | |||
| 24 | Arena (formerly Chatbot Arena) | Yes | Free | Cloud | Yes | 6.9 | ||
| 25 | SWE-bench | Yes | Free | Both | 6.8 | |||
| 26 | EvalPlus | Free | Self-hosted | 6.7 | ||||
| 27 | DecodingTrust | Free | Self-hosted | Yes | 6.6 | |||
| 28 | WebArena | Free | Both | 6.5 | ||||
| 29 | kube-bench | Free | 3.5 |
Head-to-head All 28 comparisons →
- DeepEval vs Promptfoo
- DeepEval vs Galileo
- DeepEval vs Maxim AI
- DeepEval vs Braintrust
- DeepEval vs Confident AI
- DeepEval vs Parea AI
- DeepEval vs Giskard
- Promptfoo vs Galileo
- Promptfoo vs Maxim AI
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How we rank LLM evaluation tools
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update