Alternatives to Omniai

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

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

Headroom builds custom AI software that reads email, documents and calls and turns them into records your team runs on.

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

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

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

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

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

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.

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

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

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

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

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

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

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.

Python library for constrained LLM generation with regex, context-free grammars, and inline control flow.

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.

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

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

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

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

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.