structlog vs loguru

Side-by-side — pricing, strengths, tradeoffs, and fit.

structlog

Structured logging made easy for Python applications.

loguru

Bringing enjoyable logging to Python with loguru.

At a glance

Open SourceFree Tier
● Established·From $0
Open SourceFree Tier
● Established·From $0

Overview

One-liner

Structured logging made easy for Python applications.

One-liner

Bringing enjoyable logging to Python with loguru.

Maturity

Established

Maturity

Established

Open source

✓ Yes

Open source

✓ Yes

Pricing

Free tier

✓ Available

Open source — free to use

Free tier

✓ Available

Open source — free to use

Starts at

$0

Starts at

$0

Model

Flat rate

Model

Flat rate

Enterprise

✕ None

Enterprise

✕ None

Best for

✓ Best for

Python developers who need to add structured context to their log messages
Teams building microservices that require consistent logging across services
Projects where log data needs to be easily parsed and analyzed by monitoring tools

✓ Best for

Python developers who need an easy-to-use and efficient logging solution for their applications.
Teams that prioritize readability and simplicity in their logging setup without sacrificing functionality.

Not ideal for

✕ Not for

Developers looking for a full-stack observability solution (structlog is just the logging part)
Non-Python projects, as it's specifically designed for Python applications

✕ Not for

Projects requiring highly specialized or complex logging configurations beyond the scope of loguru's features.
Scenarios where a web-based UI for managing logs is necessary, as loguru operates primarily through code integration.

Strengths

↑ Strengths

Simplified logging with context
Support for structured log formats like JSON
Flexible configuration options
Integration with existing Python logging infrastructure

↑ Strengths

Simplified logging setup and usage.
Enhanced readability with colorized output.
Automatic rotation and compression of log files.

Weaknesses

↓ Weaknesses

Limited integrations with non-Python logging systems
Complex setup for advanced configurations

↓ Weaknesses

Limited integrations with other logging systems
Small community and limited third-party support
Performance overhead for large-scale applications
Complex setup for advanced logging configurations
Full structlog profile →Full loguru profile →