v1.0 is now live: Auto-Red Teaming

Evaluation Infrastructure for AI Agents

The complete platform to benchmark, debug, and red-team your LLM applications. Move from prototype to production with confidence.

pip install langeval-sdk

Powered by modern stack

OpenAI
Anthropic
LangChain
LlamaIndex
HuggingFace

How LangEval Works

Four simple steps to robust AI agents.

1. Connect

Import your Agent via SDK or API endpoint.

2. Build

Design test scenarios with visual builder.

3. Battle

Run benchmarks & adversarial simulators.

4. Analyze

Get deep insights on accuracy & safety.

Visual Scenario Builder

Empower your QA team to build complex, multi-turn conversation scenarios without writing a single line of code. Drag, drop, and configure logic nodes to test edge cases.

  • No-code interface for complex dialogue flows
  • Templated scenarios for common edge cases
  • Collaborative editing for QA & Product teams
@monitor
def chat_agent(msg):
  # PII Masking: Auto
  return agent.process(msg)

Adversarial Battle Arena

Don't just test with static datasets. Pit your agent against aggressive 'User Simulator' bots designed to break your guardrails, inject PII, and trigger toxic responses.

  • Automated Red Teaming with specialized Attack Bots
  • Test for PII leaks, Hallucinations, and Toxicity
  • Customizable simulation parameters & difficulty
Agent
VS
Attacker
@monitor
def chat_agent(msg):
  # PII Masking: Auto
  return agent.process(msg)

Real-time Observability

Trace every chain of thought. Integration with Langfuse allows you to inspect tokens, latency, and cost per interaction. Debug failures at the step level.

  • Token-level cost and latency tracking
  • Step-by-step trace debugging
  • Seamless integration with Langfuse & LangSmith
@monitor
def chat_agent(msg):
  # PII Masking: Auto
  return agent.process(msg)

Trusted by Engineering Teams

See how leading companies secure their AI agents.

"LangEval cut our red-teaming time by 80%. The automated attack bots found edge cases we never thought of."
SC
Sarah Chen
Staff AI Engineer at FinTech Corp
"The visual builder allowed our product managers to design complex test scenarios without bugging the engineering team."
MR
Michael Ross
Head of Product at HealthBot
"Finally, a way to trace token costs and latency per step. Essential for our production monitoring."
DK
David Kim
CTO at AgentFlow

Built on Giants

LangGraph
Orchestration
AutoGen
Multi-Agent Sim
DeepEval
Scoring & Metrics
Langfuse
Tracing & Debug

Ready to ensure Agent reliability?

Join engineering teams at top tech companies who trust LangEval for their critical AI infrastructure.

Open Source (Apache 2.0) • Self-Hosted • Enterprise Support