Langtrace.ai
Open-source observability platform for monitoring and evaluating AI agents and LLM applications
| What is it | Open-source observability platform for monitoring and evaluating AI agents and LLM applications |
|---|---|
| Pricing | Freemium — from $31/mo |
| Free tier | Yes |
| Platform | Web Application |
| API | Yes |
| Best for | Monitoring AI agent performance, Tracking LLM application costs |
| Domain registered | 2024 |
Data updated Aug. 1, 2026
What does Langtrace.ai do?
Langtrace.ai is an open-source observability and evaluation platform specifically designed for AI agents and large language model applications. It provides developers with comprehensive monitoring capabilities to track the performance, costs, and accuracy of their AI systems in real-time. The platform captures detailed metrics including token usage, inference latency, error rates, and operational costs across various AI frameworks and providers.
The tool stands out with its minimal setup requirements – developers can integrate it with just two lines of code using Python or TypeScript SDKs. It supports popular AI frameworks including CrewAI, DSPy, LlamaIndex, and Langchain, along with a wide range of LLM providers and vector databases. The OpenTelemetry-compatible dashboard offers deep visibility into AI system performance, helping teams identify bottlenecks and optimize their applications.
Langtrace.ai primarily benefits development teams building production-grade AI applications who need to monitor performance, control costs, and ensure reliability. It's particularly valuable for enterprises scaling AI solutions, helping them track token consumption budgets, maintain latency thresholds, and evaluate model accuracy over time. The platform enables data-driven decisions about model selection, prompt engineering, and system architecture based on actual performance metrics rather than guesswork.
Key features
What makes it stand outWho is Langtrace.ai for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree Forever
- 5,000 spans per month
- Tracing & Metrics
- Annotations & Dataset Curation
- Evaluations
Growth
Everything in Free Forever, plus:
- 500,000 spans per year
- 0 additional cost per span
- Everything in Free forever
- Evaluations in the cloud
- Priority support
Enterprise
- Custom retention policy
- Custom SLAs
- SOC 2 Type II Compliance
Trust & presence
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