# OpenLLMetry (Traceloop)

OpenTelemetry-based instrumentation for LLM calls, vector DBs and frameworks. OpenLLMetry (Traceloop) is free, with no paid plan attached, at github.com.

## Facts

- **Pricing tier:** Free
- **Works on:** CLI, Self-hosted, API
- **Works in browser:** No

## Capabilities

- OpenTelemetry-based instrumentation for LLM calls, vector DBs and frameworks
- Ships traces to Datadog, Grafana, Honeycomb or any OTel backend
- Apache-2.0

## FAQ

### What is OpenLLMetry (Traceloop)?

OpenLLMetry (Traceloop) is listed under LLM Eval & Observability, in the AI Models & Local Execution category on Flocci AI Tools. OpenTelemetry-based instrumentation for LLM calls, vector DBs and frameworks. It is free, with no paid plan attached, and it lives at github.com.

### Is OpenLLMetry (Traceloop) free?

OpenLLMetry (Traceloop) is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

### Can I use OpenLLMetry (Traceloop) in a browser, or is there an app?

OpenLLMetry (Traceloop) needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on the command line, self-hosting and an API.

### What can OpenLLMetry (Traceloop) do?

OpenLLMetry (Traceloop) does 3 things the catalog singles out: Opentelemetry-based instrumentation for llm calls, vector dbs and frameworks; ships traces to datadog, grafana, honeycomb or any otel backend; apache-2.0.

### What is the best free alternative to OpenLLMetry (Traceloop)?

Arize Phoenix is the closest free alternative: it sits in the same LLM Eval & Observability sub-category and is free. Google Stax, Laminar and DeepEval also start free. The full list is on the alternatives page.

## Related

- [OpenLLMetry (Traceloop) alternatives](https://aitools.flocci.in/alternatives/openllmetry-traceloop)
- [LLM Eval & Observability](https://aitools.flocci.in/category/ai-models-local-execution/llm-eval-observability)
- [Best free LLM evaluation and observability tools](https://aitools.flocci.in/best/best-llm-eval-observability)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/openllmetry-traceloop

Facts last verified: October 2026