A private ChatGPT alternative, with GPT-6 included

Why people look for a private ChatGPT

ChatGPT's consumer plans can use your chats to improve OpenAI's models unless you turn that off in its data controls. Many people never find the setting, and teams worry about what employees paste in. A private alternative should make the safe choice the default instead of a setting to hunt for. No training on your chats, on every plan, with nothing to switch off. The model provider keeps nothing after it answers. Encryption, export and deletion you control. The same frontier models, so private does not mean weaker.

What Quad promises, exactly

Quad never uses your chats or files to train AI models, on any plan, free included. Quad never sells your data and never shares workspace content with advertisers. 47 of 51 chat models run on the Private Lane, which sends chats only to providers under a Zero Data Retention agreement. The other 4 ask you to confirm before you use them. Chats and files are encrypted in transit and at rest, and you can export or delete them yourself. Incognito chats stay out of your history and skip memory, and their temporary data is deleted within an hour. Quad stores your history, encrypted, so it can sync across the web, desktop and phone apps. That makes Quad private, not anonymous, and it is not end-to-end encrypted. The model you pick still reads your prompt in order to answer. See the private AI chat page for where privacy stops.

GPT-6 and the rest, in one private app

OpenAI models (Quad: GPT-6 Astra, Sol and Luna, GPT-6.1 Sol; ChatGPT consumer plans: Yes). Claude, Gemini, Grok, DeepSeek (Quad: Yes, in the same chat; ChatGPT consumer plans: No). Training on your chats (Quad: Never, nothing to switch off; ChatGPT consumer plans: On unless you turn it off, per OpenAI's data controls). Zero Data Retention routes (Quad: 47 Private Lane models; ChatGPT consumer plans: Offered to some business and API customers). Price to start (Quad: Free, 100 credits a month; ChatGPT consumer plans: Free tier, Plus at $20 a month). Quad gives you OpenAI's models, not every ChatGPT feature. If you rely on a feature that only exists inside ChatGPT, keep it for that and use Quad for the chats you want kept private.

If you stay on ChatGPT, do this

Turn off model improvement in ChatGPT's Data Controls so new chats are not used for training. Use Temporary Chat for one-off sensitive questions. OpenAI says those chats are not used for training but may be kept for a short period for safety review. Delete old chats you no longer need, and avoid pasting passwords, keys or client data into any consumer AI app. For work, ask whether your company has a business plan, where training is off by default. Those steps help, but they depend on everyone finding the right settings. Quad's default needs no steps.

Private options compared

Duck.ai gives anonymous quick questions with no history. Proton Lumo gives zero-access encryption with its own models. Local apps such as Ollama or LM Studio keep everything on your machine, with the models your hardware can run. Quad gives the frontier models from every lab, synced across your devices, with no training and Zero Data Retention. For teams, Quad's team plans give each member a private workspace with one bill. The private AI workspace page covers files and projects.

Frequently asked questions

Can I use GPT-6 privately?

Yes. In Quad, GPT-6 runs on the Private Lane with Zero Data Retention at the provider, and Quad never trains on your chats. 47 of 51 chat models run this way.

Is Quad cheaper than ChatGPT Plus?

Quad has a free plan with 100 credits a month, and paid plans start at $8 a month with Claude, Gemini and more included. ChatGPT Plus is $20 a month for OpenAI's models.

Do I need to turn off training in Quad?

No. Quad never uses your chats or files to train AI models, on any plan. There is no setting because there is nothing to opt out of.

Is Quad safe for work chats?

Chats are encrypted, never trained on and never sold, and Private Lane models keep nothing at the provider. Check your company's rules for confidential data, as you would with any AI tool.