A Duck.ai alternative with every leading model

What Duck.ai does well

Details about Duck.ai come from its own website, checked on October 14, 2026. Products change quickly, so confirm them at the source before you decide. It is free and needs no account. You open it and ask. DuckDuckGo says it removes your IP address and metadata before a prompt reaches the model provider, and that providers agree to delete prompts and responses. It says chats are not used to train models, and its help page is unusually candid about the exceptions. If you want an anonymous box for a quick question and nothing else, Duck.ai is built exactly for that, and we would point you there.

Where Quad goes further

Account needed (Quad: No for guest chat, free account to save chats; Duck.ai: No). Models (Quad: 51 chat models, including GPT-6, Claude Opus 5.5, Gemini and Grok; Duck.ai: A smaller set of models from several providers). Training on your chats (Quad: Never, on any plan; Duck.ai: Not used for training, per DuckDuckGo). Provider retention (Quad: Zero Data Retention on 47 Private Lane models; Duck.ai: Providers agree to delete prompts and responses, per DuckDuckGo). History across devices (Quad: Yes, encrypted and synced; Duck.ai: Not stored by default, with optional encrypted sync, per DuckDuckGo). Projects, documents, slides and a desktop agent (Quad: Yes; Duck.ai: Not offered, per DuckDuckGo's site). Apps (Quad: Web, Mac, Linux, iPhone and Android; Duck.ai: Web and DuckDuckGo's own apps). The trade is simple. Duck.ai keeps nothing about you and gives you less. Quad keeps your history, encrypted and under your control, so it can give you more: projects, files, documents, images and the strongest models on every device.

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.

Which one to use

Use Duck.ai when you want no account at all and a quick answer is enough. Use Quad when you want GPT-6, Claude and Gemini side by side, chats you can come back to, and work like documents, slides and images. Use a local model with a tool such as Ollama or LM Studio when nothing may leave your computer. You can try Quad the same way you try Duck.ai. Open quad.chat and ask, with no account. A free account adds saved chats and 100 credits every month.

Frequently asked questions

Is Quad as private as Duck.ai?

They protect different things. Duck.ai aims for anonymity and keeps history on your device. Quad never trains on or sells your chats and uses Zero Data Retention providers, but it stores your history, encrypted, so it can sync it.

Can I use Quad without an account, like Duck.ai?

Yes. Guest chat at quad.chat needs no sign-up. A free account is only needed to save chats and use the monthly credits.

Does Quad have more models than Duck.ai?

Quad has 51 chat models, including GPT-6, Claude Opus 5.5, Gemini, Grok and DeepSeek, plus image and video models. Check Duck.ai's current list on its site.

Does Quad train on my chats?

No. Quad never uses your chats or files to train AI models, on any plan, and never sells your data.