Duck.ai is one of the only AI chat platforms where you can hold a conversation with GPT-5 or Claude Opus without registering an account. Launched by DuckDuckGo in early 2025, it sits inside the company's existing search and browser ecosystem. You can access it at duck.ai, through the DuckDuckGo browser, or via desktop browser extensions.
Two things set it apart from other AI chat tools. Every conversation goes through DuckDuckGo's anonymizing proxy before reaching the model provider, stripping out identifying information. Providers such as OpenAI and Anthropic are also contractually prohibited from using those chats for training purposes, which is a meaningful commitment that most direct-to-model platforms don't offer.
