Open source alternatives to Guidance

Open source alternatives to Guidance, ranked by GitHub stars and freshness.

7 open-source alternatives in the index, ranked by GitHub stars and freshness.

O OSS Framework medium

Outlines

Community

Structured Outputs

★ 13,914 updated 16d ago

open-source

Best for: Developers building applications that need reliable structured data extraction from LLMs without validation failures

O OSS Framework medium

Promptify

Community

Prompt Engineering | Prompt Versioning | Use GPT or other prompt based models to get structured output. Join our discord for Prompt-Engineering, LLMs and other latest research

★ 4,612 updated 2mo ago

open-source

Best for: Python developers seeking a straightforward way to produce structured outputs from LLM prompts while managing prompt versions.

O OSS Framework medium

magentic

Community

Seamlessly integrate LLMs as Python functions

★ 2,412 updated 2mo ago

open-source

Best for: Python developers who want to quickly add LLM capabilities to their code without learning a complex framework.

O OSS Framework medium

BAML

Boundary

A typed language for LLM functions. Define inputs, outputs, and prompts, get reliable structured output.

open-source

Best for: Teams who want LLM calls to feel like real typed functions

O OSS Framework medium

Guardrails.ai

Community

Learn about Guardrails AI and how it helps build reliable AI applications

open-source

Best for: Developers building production LLM applications that need runtime guardrails for safety, format, and reliability

O OSS Framework one click

Instructor

Jason Liu (community)

Structured output for LLMs via Pydantic. The cleanest answer to 'just give me a typed object back'.

open-source

Best for: Engineers tired of regexing JSON out of model output

O OSS Framework medium

LMQL

Community

Language Model Query Language

open-source

Best for: Developers seeking precise programmatic control over LLM outputs and complex prompt logic