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📖 The AI Tool Bible

AI hallucination detection

Editorial picks for "detect llm hallucination".

23 tools

All Evaluation →
BR

Braintrust

Featured
Evaluation · Platform (any LLM)
8.9

Eval, monitor, and improve AI products end-to-end.

Freemium· Starter: $0 · Pro: $249 · Enterprise: Custom pricingevalsmonitoring
AA

Arize AI

Evaluation · Multi-model
8.2

Enterprise observability and evaluation platform for LLM agents and generative AI applications.

Freemium· AX Free: Free · AX Pro: $50 · AX Enterprise: Customllm-observabilityagent-evaluation
GI

Giskard

Evaluation · Multi-model
8.2

Continuous AI red teaming platform that stress-tests LLM agents for vulnerabilities before they hit production.

Freemium· Open-source free tier; Giskard Hub enterprise pricing on requestllm-red-teamingagent-security-testing
AA

Athina AI

Evaluation · Multi-model
8.1

Collaborative LLM evaluation and observability platform for teams shipping AI features to production.

Freemium· Starter free (10k logs/mo); Pro & Enterprise customllm-evaluationprompt-management
CU

Cube

RAG · Multi-model
8.1

Semantic layer that grounds LLM agents in your real business metrics instead of letting them hallucinate SQL.

Freemium· Cube Core open source; Cube Cloud paid, contact salessemantic-layerembedded-analytics
HO

HoneyHive

Evaluation · Multi-model
8.1

OpenTelemetry-native observability and evaluation platform for LLM agents in production.

Freemium· Free tier available; paid/enterprise tiers via salesagent-observabilityllm-evaluation
TR

TruLens

Evaluation · Multi-model (LLM-as-judge)
8.1

Open-source evaluation and tracing framework for LLM apps and agents, built on OpenTelemetry.

Free· Free, open source (Apache-licensed Python package)llm-evaluationrag-evaluation
WB

W&B Weave

Evaluation · Multi-model
8.1

Production observability, tracing, and evaluation for LLM and agent systems from the Weights & Biases stack.

Freemium· Free tier available; paid and enterprise plans via W&Bllm-tracingagent-observability
PA

Patronus

Evaluation · Platform (any LLM)
7.8

Automated LLM evaluation for hallucinations, safety, and quality.

Paid· Individual: Free · Base: $25 · Enterprise: Contact us for Pricinghallucination detectionsafety
LA

Lamini

Fine-tuning · Lamini (built on open base models)
7.7

Memory-tuning platform for grounding LLMs in your facts.

Paid· Enterprise / contact salesenterprise FTfactual recall
AR

Arthur

Evaluation · Multi-model
7.1

Open-source toolkit for testing, tracing, and monitoring production AI agents.

Freemium· Free: $0/mo · Premium: $60/mo · Enterprise: Customagent-evaluationprompt-management
FA

Fiddler AI

Evaluation · Fiddler Centor (proprietary evaluators)
7.1

Enterprise AI observability and guardrails platform for monitoring agents, LLMs, and ML models in production.

Enterprise· Free: Free · Developer: $0.002 per trace · Enterprise: Contact salesllm-observabilityagent-monitoring
MA

Maxim AI

Evaluation · Multi-model
7.1

End-to-end evaluation, simulation, and observability platform for shipping production-grade AI agents.

Freemium· Developer: Free · Professional: $29 /seat /month · Business: $49 /seat /month · Enterprise: Customagent-evaluationllm-observability
SL

SEAL Leaderboard

Evaluation · Multi-model (GPT, Claude, Gemini, Llama, etc.)
7.1

Private, expert-graded leaderboards from Scale AI that rank frontier LLMs on domains contaminated public benchmarks can no longer measure.

Free· Free to view; paid custom evals via Scale enterprise salesmodel-selectionbenchmark-tracking
SU

Superwise

Evaluation · Multi-model
7.0

Agentic management platform for runtime guardrails, policy enforcement, and observability across LLM agents.

Freemium· Starter: Free · Pro+: ? · Enterprise: ?llm-guardrailsai-governance
CT

Cleanlab TLM

Evaluation · Multi-model (wraps any LLM)
6.8

Trustworthiness scoring layer that flags LLM hallucinations in real time.

Freemium· Free tier for evaluation; usage-based API pricing; enterprise/private deployment via saleshallucination-detectionrag-evaluation
PA

Parea AI

Evaluation · Multi-model
6.8

LLM evaluation, observability, and prompt management platform for teams shipping production AI apps.

Freemium· Free (2 seats, 3k logs/mo); Team $150/mo; Enterprise customllm-evaluationprompt-management
PG

Prediction Guard

Agents · Multi-model
6.6

Self-hosted AI control plane that lets regulated enterprises govern models, agents, and MCP servers behind their firewall.

Enterprise· Contact salesai-governanceself-hosted-llm
LM

Lagotto Meter

Evaluation

Measure the gap between what your site claims and what an AI agent actually finds

Free· Free (currently in public beta)AI-visibility audit of a landing pageFact-vs-claim gap analysis for marketing copy
LA

Lakera

Evaluation · Proprietary in-house classifiers; model-agnostic (works in front of GPT-4o, Claude, Gemini, Llama, and custom LLMs)

Runtime security and guardrails for GenAI apps, agents, and RAG systems.

Freemium· Free community/developer tier at platform.lakera.ai; paid Enterprise plans (custom pricing, contact sales). No public price list.Prompt injection defense for chatbotsRAG guardrails against indirect injection
LA

LangWatch

Evaluation · Model-agnostic; supports OpenAI, Anthropic, AWS Bedrock, Azure OpenAI, Vertex AI, and any OpenTelemetry-instrumented LLM

Simulation-based testing, evaluation, and observability for LLM agents

Freemium· Developer: €0 · Growth: €29/ core-seat / month · Enterprise: CustomLLM agent regression testing in CIRAG answer-quality evaluation
TO

TokenPath

RAG · model-agnostic (works with any LLM output; uses in-house attribution model)

Token-level citation and attribution API for AI-generated answers

Freemium· 10M tokens free to start (no card), then $1 per 1M tokens pay-as-you-goRAG chatbot citationcontract and policy Q&A
VE

Vectara

RAG · In-house Boomerang (retrieval) and Mockingbird (generation) plus BYOM for GPT, Claude, Gemini, and open-weight LLMs

Enterprise agent platform with built-in retrieval, grounding, and hallucination controls

Enterprise· SaaS: $100K/ year · VPC: $250K/ year · On-prem: $500K/ yearEnterprise knowledge-base searchGrounded customer-support chatbots