Burr

Python framework that models an application as a state machine, with a trace UI and persisted state.

IndexedApache-2.0★ 2,584

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pip install apache-burr

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About

Burr models an application as a state machine built from Python action functions and transitions. Its UI tracks and traces the application in real time, and pluggable persisters save and load state for memory. The project site lists OpenAI and Anthropic among its LLM integrations, and it describes pausing execution for human input at any step. Burr is an Apache Software Foundation incubating project, and the README references release 0.43.0.

Use cases: agent-orchestration, monitoring-observability

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Fact sheet

Languages: PythonREADME
Packages: apache-burr (pypi)README
Multi-agent: Yesburr.apache.org
Orchestration: graphREADME
Memory: long-termREADME
Human in the loop: Yesburr.apache.org
Model providers: openai, anthropicburr.apache.org
Maturity: BetaREADME

Facts extracted by Claude Haiku 5.5 from the linked sources on Oct 24, 2026. Wrong fact? Tell us.

Alternatives

Frameworks for the same language with a similar way of orchestrating agents.

Signals

Stars: 2,584
Forks: 209
Open issues: 53
Weekly downloads: 4,664
Last commit: Oct 19, 2026 (9 days ago)
Last release: Aug 29, 2026 (2 months ago)
Last package publish: Aug 25, 2026 (2 months ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Packages: pypi apache-burr
License: Apache-2.0
Repository: github.com/apache/burr
Website: burr.apache.org/
Docs: burr.apache.org/
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: README Website Docs github-graphql