logfire
The best Python observability tool! 🪵🔥
Decision gist · record as of 2026-08-14
Yes, if you need Python observability and are willing to use the hosted Logfire platform or an alternative OpenTelemetry backend. The SDK is production-stable, actively maintained, has low install friction, and offers Python-specific instrumentation that rivals or exceeds generic OpenTelemetry tooling. The MIT license and open-source SDK mean no licensing risk. Verify pricing and data policies for the hosted platform before committing to production use.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later; authentication via 'logfire auth' command needed to connect to the hosted Logfire platform.
- Low install friction with a pure-Python wheel and eight runtime dependencies including OpenTelemetry libraries and protobuf.
- The package is actively maintained with a release 9 days old and 4424 GitHub stars, indicating stable ongoing development.
License · maintenance · safety
MIT (permissive) — MIT license permits unrestricted use, modification, and distribution in commercial and private projects with minimal obligations—only requiring license and copyright notice preservation.
last release 2026-08-05 (9 days) · last repo commit 2026-08-13 · 4,424 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 26,316,054 downloads/mo, #884 on PyPI
Alternatives
Verify before relying
pip install logfire
import logfire
logfire.configure()
logfire.info('Hello, {name}!', name='world')- Whether the hosted Logfire platform has a free tier or trial period before requiring payment.
- Data retention policies and pricing structure for the closed-source backend service.
- Performance overhead of instrumentation on typical application workloads.
What it is and what it does
Logfire is an observability SDK that instruments Python applications to capture execution traces, metrics, and structured logs, sending them to a hosted dashboard for real-time analysis and debugging. It wraps OpenTelemetry to provide Python-specific features like rich object display, event-loop telemetry, and database query profiling, with built-in support for frameworks like FastAPI and Pydantic models. The SDK is open-source and can export to any OpenTelemetry-compatible backend, but the primary use case is the proprietary Logfire platform, which offers SQL-based querying and a simplified dashboard designed for engineering teams.
The package depends on OpenTelemetry libraries (SDK, instrumentation, and HTTP exporter), protobuf for serialization, rich for terminal rendering, and executing for code inspection. It supports Python 3.10 through 3.14 and is actively maintained by the Pydantic team. Installation is straightforward with low dependency friction, and the MIT license imposes no restrictions on commercial use.
Use it for
- Instrument a FastAPI application to trace HTTP requests, database queries, and Pydantic validation events in real time.
- Debug performance bottlenecks by capturing execution traces and querying them with SQL in the Logfire dashboard.
- Monitor Pydantic model validations across your application to identify data quality issues and validation patterns.
- Export telemetry to a self-hosted or alternative OpenTelemetry backend without vendor lock-in.
- Add structured logging to a Python service with automatic context propagation across async tasks and distributed calls.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need Python observability and are willing to use the hosted Logfire platform or an alternative OpenTelemetry backend.
The SDK is production-stable, actively maintained, has low install friction, and offers Python-specific instrumentation that rivals or exceeds generic OpenTelemetry tooling. The MIT license and open-source SDK mean no licensing risk. Verify pricing and data policies for the hosted platform before committing to production use.
Install
logfire on PyPI
Before you install
Low install friction with a pure-Python wheel and eight runtime dependencies including OpenTelemetry libraries and protobuf. The package is actively maintained with a release 9 days old and 4424 GitHub stars, indicating stable ongoing development.
Requires Python 3.10 or later; authentication via 'logfire auth' command needed to connect to the hosted Logfire platform.
License in practice
MIT license permits unrestricted use, modification, and distribution in commercial and private projects with minimal obligations—only requiring license and copyright notice preservation.
Quickstart
pip install logfire
import logfire
logfire.configure()
logfire.info('Hello, {name}!', name='world')Verify before relying
- Whether the hosted Logfire platform has a free tier or trial period before requiring payment.
- Data retention policies and pricing structure for the closed-source backend service.
- Performance overhead of instrumentation on typical application workloads.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 8 packagesexecutingopentelemetry-exporter-otlp-proto-httpopentelemetry-instrumentationopentelemetry-sdkprotobufrichtomlityping-extensions |
| Maintenance | Actively maintained 9 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 26,316,054 / month, #884 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableEnvironment :: ConsoleEnvironment :: MacOS XFramework :: OpenTelemetryFramework :: OpenTelemetry :: DistrosFramework :: OpenTelemetry :: ExportersFramework :: OpenTelemetry :: InstrumentationsIntended Audience :: DevelopersIntended Audience :: Information TechnologyIntended Audience :: System AdministratorsOperating System :: POSIX :: LinuxOperating System :: UnixProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: InternetTopic :: Software Development :: Libraries :: Python Modules |
Evidence: logfire-4.40.0-py3-none-any.whl
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See also logfire-api · openinference-instrumentation-pydantic-ai · opentelemetry-instrumentation-llamaindex · opentelemetry-instrumentation-fastapi · opentelemetry-instrumentation-psycopg · opentelemetry-instrumentation-logging · opentelemetry-instrumentation-dbapi · opentelemetry-instrumentation-sqlalchemy · uptrace