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Burr

LLM Orchestrators

Overview

A stateful framework for building AI applications with LLMs. Burr allows developers to define complex application logic as a state machine, providing a predictable and observable way to manage long-running agentic interactions.

Burr is a Python framework for building stateful AI applications as explicit state machines, giving predictable, observable control over long-running agentic interactions. Its built-in UI visualizes state transitions for debugging. It targets developers who want reliable, inspectable application logic.

Key Features

State-machine model for AI apps
Predictable, observable execution
Built-in monitoring UI
Persistence and resumability
Open-source

Best For

Developers who want reliable, observable state management for agentic apps.

Pros & Cons

Pros

Clear, debuggable state control
Good observability built in
Open-source

Cons

State-machine modeling has a curve
Smaller ecosystem

Pulse Verdict

“The framework for stateful AI. Burr's focus on clear state management and observability makes it an excellent choice for building reliable, production-ready AI agents.”

Pricing

Open-source and free; you supply model access.

Pricing changes often — confirm current plans on the official site.

Visit Official Website →

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