Free open source alternative app list of OpenAI :

LocalAI

Key features Self-hosted AI runtime covering text, voice, vision, and agent capabilities. OpenAI-compatible API, making it a practical free alternative to the OpenAI API. Runs LLMs and other AI models locally, keeping data on your own hardware and off external services. Works across Windows, macOS, Linux, and Raspberry Pi OS. Fully open source under the MIT license — no usage limits or API fees. Platforms: Windows, macOS, Linux, Raspberry Pi OS Links Official website: https://localai.io Source code: https://github.com/mudler/LocalAI Pricing Free. Completely free and open source under the MIT license; self-host all AI features without usage limits or API fees.

FreeWindowsmacOSLinuxRaspberry Pi OS

Others are looking for free open source alternatives of following apps:

Acorn 7

Acorn 7 is a Mac image editor for editing photos and creating graphics.

AI & Machine Learning

Free open-source AI & machine learning tools.

Ad Blocker

Ad Blocker is a browser tool that removes intrusive ads and pop-ups from web pages.

AdGuard

AdGuard is a cross-platform ad blocker that filters web content and protects privacy.

Adobe Premiere Pro

Adobe Premiere Pro is a professional video editing software for film, TV, and web.

AI / LLM Inference

AI/LLM Inference delivers fast, scalable deployment of large language models for generating AI responses.