Openllmetry

OpenLLMetry is an open source set of OpenTelemetry extensions for observing applications built on large language models. It was created by Traceloop and is licensed under Apache 2.0, so it can be used for free and pointed at any of more than 25 supported observability platforms, Traceloop included. The SDK is added with two lines of code in Python or TypeScript. Once initialized, it records every call to an LLM provider and every call to a vector database as a span, capturing prompts, completions and token usage. Workflow decorators group those spans into traces for a larger operation. The vendor's examples cover OpenAI, Anthropic, Bedrock, Cohere, Watsonx, Gemini and Ollama, along with LangChain, LlamaIndex and Chroma pipelines. Because the output is standard OpenTelemetry data, it fits into existing monitoring stacks rather than requiring a separate one. It is aimed at developers and platform teams who want tracing for LLM features without adopting a proprietary agent. The library itself is free. Traceloop, the company behind it, also sells a hosted platform with monitoring and evaluation dashboards, CI/CD integration and prompt management. Its Free Forever plan costs $0 per month and includes up to 50,000 spans per month, up to five seats and 24 hours of data retention. An Enterprise plan with more spans, unlimited seats, custom retention, SOC 2 compliance, an on premise option and dedicated Slack support is quoted on request. The site also announces that Traceloop is joining ServiceNow.