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Apache Burr

Free#6 of 49 in LLM Application Development Frameworks

Apache Burr: An open-source Python framework for stateful, inspectable workflow applications. Ranked #6 of 49 in LLM Application Development Frameworks by our editors (8.8/10); pricing: Free plan; best for stateful, inspectable workflow applications.

8.8/10Editor score
Visit Apache Burr
Apache Burr8.8 Visit Apache Burr

At a glance

  • Editor score
    8.8 / 10
  • Pricing
    Free plan
  • Best for
    Stateful, inspectable workflow applications
  • Free plan
    Yes
  • Paid from
    None
  • RAG support
    Yes
  • Facts checked
    28 Sep 2026

  • Where it wins

    • Immutable state, persistence, and resumable human-input pauses
    • Parallel actions and branches support complex workflows
    • Burr UI exposes execution telemetry for inspection and debugging

  • Where it doesn't

    • Python-focused; no official JavaScript or TypeScript SDK is identified
    • Requires developers to implement LLM calls within actions
    • Fewer ready-made model integrations and agent capabilities than some alternatives

Our verdict on Apache Burr

Apache Burr is an open-source Python framework for building applications from actions, transitions, and explicit state. It is aimed at developers orchestrating chatbots, agents, conversational retrieval workflows, and other applications that need to retain and inspect progress. Its framework-agnostic approach lets developers implement LLM calls and other work with libraries of their choice, rather than requiring a particular model stack.

State management and workflow control are central to Burr. Immutable state is changed through update operations, and workflows can pause for human input and resume later. Developers can also run parallel actions and branches, persist state through pluggable database backends, and connect vector stores for retrieval-augmented generation. Documentation includes conversational RAG and multi-agent examples, including supervisor patterns. This makes Burr a fit for applications where explicit transitions and inspectable execution matter; teams seeking a ready-made, high-level agent product may prefer a more integrated alternative.

The ecosystem spans OpenAI, LangChain / LCEL, and Haystack, alongside storage options such as SQLite, PostgreSQL, Redis, MongoDB, LanceDB, and Qdrant. FastAPI, Streamlit, Pydantic, Ray, Hamilton, and OpenTelemetry are also listed integrations. Burr provides a UI for examining telemetry and debugging executions, with community and documentation as support channels. It is self-hosted and available on Linux, macOS, and Windows. Its Python focus is important for platform fit: the project documentation does not identify official JavaScript or TypeScript SDKs. Choose Burr for a Python team that values stateful workflows, persistence, and observability; consider another framework if broad ready-made model integrations or a JavaScript SDK is a priority.

Apache Burr pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on burr.apache.org

Apache Burr fact sheet

Free planYes
Paid fromNone
Primary languagePython
RAG supportYes
Agent and tool useYes
Workflow graphsYes
Prompt optimizationNot verified
Open-source licenseApache-2.0
JavaScript/TypeScript SDKNo
DeploymentSelf-hosted
PlatformsLinux, macOS, Windows
SupportCommunity, Docs
Built forSolo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations15 integrations: OpenAI, LangChain / LCEL, Haystack, Hamilton, Ray, SQLite … See all →
PricingFree plan
Websiteburr.apache.org
Facts checked28 Sep 2026

Apache Burr integrations

Apache Burr lists 15 integrations on its own site.

  • OpenAI
  • LangChain / LCEL
  • Haystack
  • Hamilton
  • Ray
  • SQLite
  • PostgreSQL
  • Redis
  • MongoDB
  • LanceDB
  • Qdrant
  • OpenTelemetry
  • FastAPI
  • Streamlit
  • Pydantic

See all Apache Burr integrations →

Alternatives to Apache Burr

See all Apache Burr alternatives →

Apache Burr vs the competition

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Featured on iTechGuides

Featured on iTechGuides — Apache Burr 8.8/10

Apache Burr is listed in our LLM Application Development Frameworks directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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