AI Infrastructure & MLOps Free

Burr

Apache framework for stateful, observable, human-in-the-loop AI applications

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PricingFree
Starting price$0 software
Free planYes
Free trialYes
APIYes
Open sourceYes
DeploymentSelf Hosted
Last verifiedAugust 1, 2026
Overview

Tool overview

Burr is listed under AI Infrastructure & MLOps AI tools.

Summary

What is Burr?

Apache Burr (Incubating) is an Apache-2.0 Python framework for applications that make decisions, including chatbots, agents, and simulations. It models workflows as actions and transitions, persists state, supports parallelism and human input, and includes local tracking, tracing, debugging, and integrations with common model and data frameworks.

Best fit

Best for

Python teams building stateful and observable agent or decision applications

Audience

Who is it for?

AI application engineersAgent developersPlatform teamsResearch engineers
Recommendation

Decision note

Accepted for Preview after independent V411 official-source verification. Apply only after failures = 0, warnings = 0, unmapped = 0, Arabic v2 parity is valid, the logo result is reviewed, and all controlled fields, explicit clears, outreach evidence, affiliate evidence, rebrand status, and source notes are visually confirmed.

Capabilities

Key features

Action-and-transition application graphs

State persistence and recovery APIs

Local tracking, tracing, and debugging UI

Human input, parallelism, and pluggable integrations

Workflows

Use cases

Building stateful AI assistants

Orchestrating multi-step agent workflows

Debugging and replaying decisions

Adding persistence and human approval

Strengths

Pros

  • Apache-2.0 open-source project
  • Official signed Apache releases
  • Strong state and observability primitives
Considerations

Limitations

Burr structures execution but does not guarantee correct or safe actions. Developers must constrain permissions, secure credentials, validate state serialization, test recovery paths, monitor traces, and keep accountable human oversight for consequential workflows.

Cost

Pricing details

Pricing modelFree
Starting price$0 software
Free planYes
Free trialYes
Pricing context

Billing options

Free open-source software

Pricing context

Pricing note

Apache Burr is free open-source software under Apache-2.0. Version 0.42.0 is the latest official Apache release shown on the downloads page. Model, database, hosting, tracing-backend, and infrastructure costs are separate.

View official pricing
Compatibility

Supported languages

  • English
Connectivity

Integrations

OpenTelemetry

Pydantic

FastAPI

PostgreSQL

MongoDB

Redis

Specs

Technical details

PlatformsWeb
Multilingual supportUnknown
Login requiredNo
Open sourceYes
LicenseApache-2.0
DeploymentSelf Hosted
CompanyApache Software Foundation
Current version0.42.0
Editions / plansApache Burr (Incubating)
Data confidenceHigh
Last verifiedAugust 1, 2026
Documentation → Source code → Release notes → Data source →
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Answers

Frequently asked questions

Apache Burr (Incubating) is an Apache-2.0 Python framework for applications that make decisions, including chatbots, agents, and simulations. It models workflows as actions and transitions, persists state, supports parallelism and human input, and includes local tracking, tracing, debugging, and integrations with common…
Python teams building stateful and observable agent or decision applications
The listed pricing model for Burr is Free. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
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