Traceloop
Open-source LLM observability built on OpenTelemetry, with automatic instrumentation for major providers and frameworks
Traceloop provides LLM observability through OpenLLMetry, an open-source set of OpenTelemetry extensions for GenAI applications. It automatically captures latency, token usage, costs, and full prompt/response pairs with just two lines of code. Supports OpenAI, Anthropic, Cohere, AWS Bedrock, and Google Vertex AI, plus frameworks like LangChain, LlamaIndex, and Haystack. SDKs available for Python, TypeScript, Go, and Ruby. Because it is OpenTelemetry-native, traces can be exported to any compatible backend including Datadog, New Relic, Honeycomb, and Sentry.
Pricing: Monthly subscriptions
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