Apache Burr: Build reliable AI agents and applications

# Apache Burr (Incubating) - Build Reliable AI Agents and Applications Source: [https://burr.apache.org/](https://burr.apache.org/) 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\. 0GitHub Stars 0k\+PyPI Downloads 0\+Discord Members ## 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\.  P Peanut Robotics  W Watto\.ai  P Paxton AI  P Provectus  T TaskHuman