structlog
Structured logging made easy for Python applications.
- Status
- Generally available
- Last checked
- Aging · Sep 4, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
Structlog is a structured logging library that simplifies the process of adding context to log messages in Python. It helps developers create more useful and actionable logs, which are essential for debugging and monitoring applications.
Structlog stands out with its simplicity and flexibility in adding structured context to log messages, making it easier than ever to create actionable logs without complex configurations.
When it fits — and when it doesn’t
A good fit 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
Look elsewhere if
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
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Limited integrations with non-Python logging systems
Primarily designed for Python ecosystems, limited support for other languages and frameworks
- 02
Complex setup for advanced configurations
Configuring processors and formatters can be intricate, requiring deep understanding of structlog's internal mechanisms
What it does well
Simplified logging with context
Support for structured log formats like JSON
Flexible configuration options
Integration with existing Python logging infrastructure
Pricing
- Free tier
- YesOpen source — free to use
- Paid from
- $0
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up structlog
Setup steps, common gotchas and what to check after 30 days.