Every pick below was checked on its official site. Pricing changes, so confirm the current plan before you rely on it.

LLM APIs and platforms

Vercel’s open-source TypeScript SDK for building AI apps across models.Open source

LLM APIs and platforms

An open-source desktop chat app that runs models offline or connects to cloud models.Open source

LLM APIs and platforms

A private, on-device AI assistant for chatting with your documents, with agents built in.Open source + hosted

LLM APIs and platforms

Nomic’s desktop app for running open-source models locally, with your data on your machine.Open source