Now in Public Beta

    The DataDog for AI Agents

    Monitor, debug, and test autonomous AI systems with production-grade observability

    Start FreeView Documentation
    No credit card required
    50k free traces
    Open source SDK
    Live Agent Trace
    Agent
    GPT-4
    Router
    Search
    Code
    Claude
    API

    Traditional Testing Breaks With AI Agents

    The same prompt can trigger different reasoning paths, tool calls, and outputs

    🐛

    Print Statement Debugging

    Debugging agent failures with console.log and prayer

    🎲

    Non-Deterministic Testing

    No standardized testing for AI that changes its mind

    📋

    Compliance Gaps

    Can't answer "Why did the agent do that?"

    🔧

    Custom Infrastructure

    Every team reinvents logging and tracing

    🔒

    Framework Lock-in

    LangSmith only works with LangChain

    3 Integrated Layers for Complete AI Agent Observability

    📊

    Observability Layer

    Auto-instrumentation for 10+ frameworks with one-line initialization

    • prela.init() - One line to instrument everything
    • <1% latency overhead, <10MB memory footprint
    • OpenAI, Anthropic, LangChain, LlamaIndex, CrewAI, AutoGen, LangGraph, Swarm, n8n
    • Real-time guardrails — PII, injection, content filtering
    • Prompt management with versioning and stage promotion
    • Drift detection with statistical baselines + anomaly alerts
    ✅

    Testing Layer

    21+ assertion types with deterministic replay engine

    • Structural, semantic, tool, and multi-agent assertions
    • Re-run traces with different models for comparison
    • Parallel evaluation with JUnit reporter for CI/CD
    • Auto-generate eval suites from production traces
    🤝

    Collaboration Layer

    Real-time updates with multi-tenant dashboards

    • WebSocket updates with <1ms latency
    • n8n workflows, multi-agent graph visualization
    • Event-driven: ClickHouse + Redis
    • AI-powered Debug Agent for root cause analysis

    Built for Production AI Agents

    Zero Configuration

    Auto-detects and instruments all frameworks automatically

    agent.py
    import prela
prela.init()  # Auto-detects and instruments all frameworks

from langchain.agents import create_openai_agent
agent = create_openai_agent(...)  # ← Automatically traced!

    Deterministic Replay

    Unique to Prela

    Capture, replay, and compare with full context preservation

    Replay EngineComparing
    GPT-4
    Claude-3.5

    Semantic diff: 94% similarity

    Multi-Agent Native

    Unique to Prela

    The only tool supporting all 4 major multi-agent frameworks

    Agent Graph
    CrewAIAutoGenLangGraphSwarm
    Orchestrator
    Researcher
    Analyst
    Writer
    Tool: Search
    Tool: Write

    Real-Time Updates

    WebSocket infrastructure with <1ms notification latency

    Live Updates
    Connected
    12:34:56.789Agent started
    12:34:56.912LLM call: gpt-4
    12:34:57.234Tool: search_web
    12:34:57.456Response received
    <1ms WebSocket latency • Redis Pub/Sub

    Debug Agent

    Pro Feature

    AI-powered root cause analysis with failure chain tracing and actionable fix suggestions

    Debug AgentRoot Cause Found

    Error: Rate limit exceeded

    agent.py:142 → llm_call()

    Root Cause

    Missing retry logic + no rate limit backoff

    Suggested Fix

    Add exponential backoff with max_retries=3

    Guardrails & Security

    Real-time guardrails with prompt injection detection, PII scanning, and content filtering across all LLM calls

    Security Scan2 Issues
    PII Detected

    Email address in prompt

    Injection Risk

    Ignore previous instructions...

    Clean

    No issues in 847 other spans

    Prompt Management

    Version-controlled prompt templates with variable substitution, stage-based promotion, and full history tracking

    Prompt Registry3 versions
    v3staging

    You are a helpful {{role}}...

    v2production

    Classify: {{text}}...

    v1

    Hello {{name}}!

    Eval Generation

    Pro Feature

    Auto-generate comprehensive test suites from your production traces

    Eval Generator12 tests created
    test_response_accuracypass
    test_tool_selectionpass
    test_error_handlingfail
    test_latency_budgetpass

    Generated from 1,247 production traces

    Why Choose Prela?

    See how we compare to other observability tools

    Feature
    Prela
    LangSmith
    Langfuse
    Framework Agnostic
    10+ frameworks
    LangChain only
    Limited
    Multi-Agent Support
    CrewAI, AutoGen, LangGraph, Swarm
    Deterministic Replay
    Full context + modifications
    Real-Time Updates
    <1ms WebSocket
    Polling
    Polling
    Open Source SDK
    Apache 2.0
    Partial
    MIT
    AI Debug Agent
    Root cause + fix suggestions
    Guardrails & Security
    Guardrails + PII + injection (free)
    Eval Generation
    From production traces
    Manual only
    Drift Detection
    Statistical baselines
    Prompt Management
    Versioned + stage promotion
    Hub
    Basic
    LLM-as-Judge
    Built-in eval assertions
    LangSmith evals
    Custom only
    Alerting
    6 metrics, 3 channels
    Basic

    Production-Ready

    <1%
    Latency Overhead
    <10MB memory footprint
    <100ms
    Query Performance
    ClickHouse optimized
    10+
    Frameworks Supported
    More than any competitor

    Get Started in 60 Seconds

    01

    Install SDK

    bash
    pip install prela
    02

    Initialize (2 lines)

    python
    import prela
prela.init()  # That's it!
    03

    View Traces

    Dashboard

    Start free. Scale as you grow.

    Free

    For individual developers

    $0/month
    • 50k traces
    • Core SDK features
    • Community support

    Lunch Money

    For hobbyists and side projects

    $10/month
    • Replay engine
    • All frameworks
    • Email support
    Most Popular

    Pro

    For teams building production AI

    $79/month
    • Debug Agent (AI root cause)
    • Security scanning
    • Drift detection + alerts
    • Eval generation

    Enterprise

    For organizations at scale

    Custom
    • Compliance & audit logs
    • SSO & SAML
    • Dedicated infrastructure
    • SLA guarantee
    View Full Pricing

    Ready to Build Production AI Agents?

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