Alternatives to Reachat

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

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

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

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

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

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

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

Grok chat, vision and streaming for Laravel 10-12 through one MIT Composer package and a GrokAI facade.

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

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

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

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

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

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

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

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.

A type-safe, open-source TypeScript library for orchestrating multi-step AI workflows on top of the Vercel AI SDK.

Open-source Java/Kotlin framework for assembling DDD-aligned SDLC LLM copilots from a five-stage pipeline.

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

Amarsia's Conversation API adds stateful AI chat — stored message history, streaming, and credit-based multi-model routing.

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

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

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

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

xsAI is an extra-small OpenAI-compatible AI SDK for JavaScript and TypeScript — 13.1 KB gzipped with every package included.

Django AI Assistant adds LLM chat, RAG, and Tool Calling into your existing Django app

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

BAML is a type-safe, Turing-complete language for agentic and LLM code that compiles typed Python and TypeScript SDKs.