Alternatives to Genblaze

Open-source Python library that constrains LLM output with regex, context-free grammars, and inline control flow.

Mirascope is an open-source Python library that turns LLM calls, tools, and prompt versioning into plain decorated functions.

Open-source framework for adding agent chat, generative UI, and human approvals to React apps on any agent backend.

Outlines is a Python library for structured generation that constrains LLM decoding so JSON, regex, and grammar outputs are valid every

Open-source React toolkit for generative UI that renders your own components from natural language

spaCy is the open-source Python NLP library for fast, production-grade text processing and information extraction at scale.

Genkit is Google's open-source AI SDK for building agentic AI apps in TypeScript, Go, Python, and Dart.

Open-source Python framework that adds retrieval-augmented document Q&A to your app in five lines of code

Open-source Python RAG framework that turns your PDFs, Notion pages, and websites into a queryable AI app in a few lines of code.

Marvin is an open-source Python framework that turns LLM calls into typed functions, agents, and Pydantic-validated results.

Open-source Python library for building and auto-optimizing LLM workflows, from RAG systems to agents.

Hazm is an open-source Python library for Persian NLP: normalization, tokenization, tagging and dependency parsing.

Open-source TypeScript SDK for streaming AI apps and agents across 100+ models, with built-in provider fallbacks

OpenUI turns AI agent responses into streaming generative UI built from your own component library.

Free browser markdown editor with Battle Mode for comparing OpenAI, Claude, and Gemini prompt outputs, client-side only.

PrivateGPT is the open-source on-premise RAG framework for local document Q&A — 57k GitHub stars, zero cloud calls.

Open Strawberry is a free, open-source chain-of-thought inspector for reading and comparing model reasoning traces.

Free OpenAI API examples and Python notebooks for building chat, embeddings, and RAG apps

Open-source Ruby gem that calls 11 LLM providers through one consistent interface for embeddings, completions, and chat.

Open-source Java library that puts a unified LLM and vector store API inside your JVM app

Open-source React chat UI components for building LLM chat interfaces in hours, not weeks

Eino is an open-source Go LLM framework from ByteDance for building agents, graphs, and RAG pipelines in your existing Go backend.

Open-source, self-hosted RAG API from talkd.ai that runs any LLM over your own documents via Docker Compose.

Open-source JS/TS toolkit for building multimodal LLM agents with streaming, validation, and managed memory

Rig is an open-source Rust LLM framework for shipping type-safe AI agents across 20+ providers.

TOON is an open-source, token-efficient encoding of the JSON data model for LLM prompts, using 42.6% fewer tokens than JSON.

Open-source LLM from UC Berkeley that turns natural language into API calls and tool-using agent actions.

Visual AI workflow builder for chaining prompts, images, and APIs on a drag-and-drop canvas

Open-source Java machine-learning framework plus a free REST API with 14 pre-trained NLP classifiers

Open-source Rust library for building streaming, parallel LLM pipelines — data indexing, retrieval-augmented generation, and autonomous agents.