Best Open Source Alternatives to ChatGPT

Compare the best free and open-source alternatives to ChatGPT — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 11 alternatives

ChatGPT

Proprietary SaaS

PricingFreemium

Platformsweb, mobile

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ChatGPT alternatives compared

Open-source alternatives to ChatGPT, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Ollama	185,701	MIT	macOSLinuxWindows	No	Nov 2026	Visit
Open WebUI	157,576	MIT	LinuxDocker	Yes	Nov 2026	Visit
LobeChat	83,777	—	LinuxmacOSWindows	No	Nov 2026	Visit
Cherry Studio	53,230	AGPL-3.0	LinuxmacOSWindows	No	Nov 2026	Visit
LibreChat	46,674	MIT	LinuxDockerWeb	Yes	Nov 2026	Visit
Morphic	9,259	Apache-2.0	Web	No	Nov 2026	Visit
5ire	5,372	—	LinuxmacOSWindows	No	Oct 2026	Visit
Fullmoon	2,271	MIT		No	May 2025	Visit
Zola	1,539	Apache-2.0	Web	No	Dec 2025	Visit
VT Chat	59	MIT	Web	No	Oct 2026	Visit

Top open-source ChatGPT alternatives

Ollama185,701MIT

Ollama is an open-source local LLM runner that replaces metered APIs like ChatGPT with zero-marginal-cost inference on developer hardware.

macOSLinuxWindows

vs ChatGPT: a free, open-source option you fully control, licensed MIT.

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Open WebUI157,576MIT

Open WebUI is a self-hosted ChatGPT alternative that connects to local and cloud LLMs with built-in RAG, granular RBAC, and complete data privacy.

LinuxDocker

vs ChatGPT: a free, open-source option you fully control, licensed MIT.

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LobeChat83,777

LobeChat is an open-source, self-hosted AI workspace and ChatGPT alternative that unifies multi-model routing, MCP tool integrations, and private memory.

LinuxmacOSWindows

vs ChatGPT: a free, open-source option you fully control.

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Cherry Studio53,230AGPL-3.0

Open-source desktop client for Claude and OpenAI APIs that pairs cloud models with local Ollama runtimes and Model Context Protocol tools.

LinuxmacOSWindows

vs ChatGPT: a free, open-source option you fully control, licensed AGPL-3.0.

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LibreChat46,674MIT

LibreChat replaces ChatGPT with a self-hosted AI chat interface, bringing multi-provider routing, MCP tools, and LDAP authentication under team control.

LinuxDockerWeb

vs ChatGPT: a free, open-source option you fully control, licensed MIT.

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Best Open Source Alternatives to ChatGPT

ChatGPT

ChatGPT alternatives compared

Top open-source ChatGPT alternatives

The modern standard for Protobuf workflows

Mentoring for backend developers. Consulting for startups.

More alternatives to ChatGPT

Morphic

5ire

Fullmoon

Zola

VT Chat

Patzer