Alternatives to Whatlang Rs

Simplemma is a pure-Python multilingual lemmatizer that returns dictionary lemmas across 35 languages.

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

BAML is a type-safe language with an agent-ready CLI for building, testing, tracing and querying LLM functions.

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

Guidance is a Python constrained generation library that steers LLMs with regex, context-free grammars, and inline control flow.

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

Open-source Python library that gives you retrieval-augmented document Q&A in about five lines of code

spaCy is the open-source Python NLP library for fast named entity recognition, dependency parsing and production text processing at scale.

Open-source Java library giving JVM apps one unified API for LLMs and vector stores

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

LMQL is a programming language for LLMs that uses types, templates and constraints to make prompts modular and outputs reliable.

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

Zero-dependency JavaScript NLP library with a full pipeline for Node.js and the browser.

Free open-source Python library for tokenizing, tagging, parsing, and exploring 50+ linguistic corpora.

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

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

A lightweight, type-checked deep learning library for composing models across PyTorch, TensorFlow and MXNet backends.

Local MCP context gateway that compresses and filters what your AI coding agent reads

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

CopilotKit is an open-source React framework for adding agent chat, generative UI, and human approvals to your app.

Outlines enforces structured generation by constraining LLM decoding so JSON, regex, and grammar output is valid at every token.

Tiptap AI Toolkit lets your AI agent edit rich-text documents in place with schema-aware, reviewable patches.

Open-source TypeScript AI SDK for streaming AI apps and agents with multi-model support and built-in fallbacks

OpenUI is the open standard for generative UI: an LLM writes OpenUI Lang and your registered components render as live interfaces.

Conversation API adds stateful AI chat to your app — stored history, token streaming, and credit-based model routing.

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

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

Bitsandbytes brings k-bit quantization to PyTorch for 8-bit optimizers, LLM.int8() inference, and QLoRA 4-bit fine-tuning.