12 free AI models, one simple chat

Use the best free AIs, all from one place.

Zintus connects you to 12 free AI services at once. Ask a question and it automatically picks one that's fast and available. If one runs out, it switches to another — so you can keep chatting.

Try it now See how it works

Free & open source. Connect provider keys when you're ready.

Developer?git clone https://github.com/zintus/zintus.git && cd zintus && bun install

12Free AI services

4Ways to use it

$0To get started

100%Open source

Simple as 1, 2, 3

How it works

Connect your free keys

Sign up for the free AI services you want (like Groq or Gemini) and paste your keys in once. They're stored safely on your own device.

Ask your question

Type a message like you would in any chat app. No need to choose which AI to use — Zintus handles that for you.

Get an answer, every time

It picks a fast, available AI and replies. If that one is busy or out of free usage, it automatically switches to another — so you're never stuck.

Why people use it

All the free AI, none of the hassle

Keep chatting when one runs out

Free AIs run out of usage quickly. Zintus watches all 12 and switches automatically when another provider has quota left.

Spend nothing to start

It uses the free tiers of each service. No subscription, no credit card — bring the free keys you already have.

Your keys stay private

API keys are saved securely on your own device, never on our servers. You stay in full control.

Works everywhere

Use it in your browser, on the desktop app, on your phone, or right in the terminal — same chat, same keys.

Supported AIs

12 AI services. One chat box.

Mix fast cloud models with private models that run on your own computer. Turn on the ones you want — Zintus picks the best one for each message.

Cerebras

Super fast

Groq

Super fast

Gemini

Balanced

OpenRouter

Balanced

Cohere

Balanced

Mistral

Balanced

DeepSeek

Powerful

Fireworks AI

Powerful

xAI Grok

Powerful

Hugging Face

Powerful

LM Studio

Runs on your PC

Ollama

Runs on your PC

For developers

Run it yourself in under a minute

Clone the repo, install dependencies, then start the CLI, gateway, or web app. Not a developer? Use the web chat — no install needed.

$ git clone https://github.com/zintus/zintus.git && cd zintus && bun install

Questions & answers

Frequently asked questions

Is it really free?

Yes. Zintus uses the free tiers of each AI service, and the app itself is free and open source. You only pay if you choose to upgrade a provider's plan yourself.

Are my API keys safe?

Yes. Your keys are stored securely on your own device — in your browser's encrypted storage, your computer's keychain, or your phone's secure store. They are never sent to our servers.

Do I need to be a developer?

No. The web and desktop apps work like any normal chat app. Developers also get a command-line tool and a self-hostable gateway if they want them.

What happens when a free AI runs out?

Zintus tracks each service's usage and automatically switches to another available one when a provider is exhausted.

Which AIs are supported?

12 services today: Cerebras, Groq, Gemini, OpenRouter, Cohere, Mistral, DeepSeek, Fireworks AI, xAI Grok, and Hugging Face in the cloud, plus LM Studio and Ollama running on your own computer.

Is it open source?

Yes, it's MIT licensed. You can read the code, run it yourself, or contribute on GitHub.

Ready to try it?

Open the chat and start asking. It's free, and you can connect your AI services in a couple of minutes.

Open the chat View on GitHub