Alternatives to Langchainrb

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

RubyLLM is the Ruby-native AI framework for chat, agents, tools, and RAG across 19 providers with one API.

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

Open-source Ruby gem giving one unified API across Anthropic, DeepSeek, Google, Mistral, Llama, and OpenAI

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

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

Unified C# .NET library for calling 15+ LLM providers through a single strongly-typed API.

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

A Scala library that calls OpenAI's HTTP APIs from the JVM with typed, effect-friendly code

Open-source wire protocol suite that standardizes LLM, vector, graph, and embedding calls so you swap providers in config, not code

Open-source Java library that tokenizes text with OpenAI's BPE encodings so you can count, encode and decode locally

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.

Attention Sinks keeps Llama, Mistral, MPT, Falcon and Pythia chat models fluent with constant VRAM via a one-line import swap.

DiscuroAI chains GPT-3 prompt templates and DALL-E 2 image calls into multi-step workflows you run with one API request that returns JSON.

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

Mellea turns type-annotated Python functions into validated, testable LLM calls with token-level constrained decoding.

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

Go SDK for AI apps: one type-safe API for text generation, streaming, tools and MCP across 25+ LLM providers.

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

xsAI is an extra-small OpenAI-compatible AI SDK for JavaScript and TypeScript, 13.0 KB gzipped with every package included.

Drop-in AI autocomplete for any text input — two lines of code, OpenAI's GPT models underneath.

SwiftOpenAI: an MIT-licensed Swift package for calling the OpenAI API with native async/await and Combine on Apple platforms.

TypeLLM returns typed, schema-conformant values from text and images in one API call — no JSON repair loops.

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.

Hugging Face Tokenizers: train BPE, WordPiece and Unigram vocabularies and tokenize a GB of text in under 20 seconds.

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

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