Apache Incubating Project
Apache Burr (Incubating) makes it easy to develop applications that make decisions, from simple chatbots to complex multi-agent systems. Pure Python, no magic.
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Simple, powerful Python API
Build anything from chatbots to multi-agent systems with a clean, composable interface.
Everything you need to build AI applications
Burr provides the building blocks for reliable, observable, and testable AI-powered applications.
Simple Python API
Define your application as a set of actions and transitions. No DSL, no YAML — just Python functions and decorators.
Built-in Observability
The Burr UI lets you monitor, debug, and trace every step of your application in real time. See state changes as they happen.
Persistence & State Management
Automatically persist state to disk, databases, or custom backends. Resume applications from where they left off.
Human-in-the-Loop
Pause execution and wait for human input at any step. Perfect for approval workflows and interactive agents.
Branching & Parallelism
Run actions in parallel, fan out / fan in, and build complex DAGs. Compose sub-applications for modular design.
Testing & Replay
Replay past runs, unit test individual actions, and validate state transitions. Build confidence in your AI systems.
Works with your stack
Burr integrates with the tools and frameworks you already use. No lock-in, no wrappers.
Trusted by engineers worldwide
See what developers and teams are saying about Burr.
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