Logfire

Logfire is an observability platform that shows you what your application is actually doing: every request, database query, LLM call, and error, with how long each one took, in your browser. It is built on OpenTelemetry (OTel), the open industry standard for collecting traces, metrics, and logs, and works across your whole stack, from traditional backends to AI agents. Read why Logfire exists.

New here? Create a free account, then pick a starting point below, or follow a guided path for your role.

Quickstarts

• Send your first trace

  Install the SDK and watch a trace arrive in the Live view, in about 5 minutes.

• Trace your AI and LLM calls

  See the spans, tokens, cost, and tool calls behind your model-powered features.

• Let an AI coding agent set it up

  Paste one prompt into Claude Code, Cursor, or a similar tool and let it wire up Logfire for you.

Explore

• Watch it live

  See traces and logs stream in, and drill into any span to read its full detail.

• Query with SQL

  Slice your data with the SQL you already know, not a proprietary query language.

• Dashboards and alerts

  Chart what matters and get notified in Slack when it changes.

• Evaluate and ship AI features

  Run evals, manage prompts, and route models through the AI gateway.

• Metrics and infrastructure

  Monitor hosts, Kubernetes, and Docker next to your application metrics.

• Integrations

  FastAPI, Django, SQLAlchemy, HTTPX, and 40+ more, each with one line of setup.

New to observability?

Core concepts explains spans, traces, and logs, and how to read them in Logfire.