There is no AI chat app that gives a logged-out visitor everything a signed-in account gets, so the real question is which limit you will hit first. As of 2026-11-02, PLAI.chat publishes the clearest no-login terms of the services we checked: 20 free messages a day, no email, account or card.
Skipping sign-up is the main reason people search for this. They want one answer from a chatbot without handing over an email address, or they are on a shared or work machine and do not want a new account tied to a prompt. The trade is always the same: the more a service lets you do anonymously, the less it usually lets you keep.
We ranked six services on what a logged-out visitor actually gets. Where a service’s own pages state a number, we report it. Where they do not, or a page was blocked to us, we say so rather than borrow a figure from an aggregator.
What “no login” actually costs you
Logged-out use is a deliberately small tier. On PLAI.chat, GPT, Gemini and Grok models, web search, image generation and Zero Data Retention mode all sit behind a sign-in, and the free allowance is a fixed 20 messages a day. Secondary reports say ChatGPT’s guest mode has no saved history or sharing, and that Gemini’s guest mode at launch offered a default model only, with no uploads. This is the price of anonymity, not a flaw: persistence, uploads and the best models are what accounts are for.
Anonymous is not the same as private
Not needing an account removes one identifier, but your prompt still travels to a model provider. PLAI.chat says so itself: prompts are relayed to the model you select, and IP-level infrastructure logs exist for security and rate limiting. Duck.ai says it anonymizes conversations with third-party models and does not store prompts or train on them. ChatGPT guest conversations, per secondary reports, may be used to improve models unless you opt out in settings. If the content is sensitive, check the retention terms of the provider behind the model, not just whether a login box appeared.
Where this is heading
Guest tiers are narrowing in some places and widening in others. A July 2026 Microsoft Tech Community thread reports Copilot on Edge for Android InPrivate now asking for sign-in, while Duck.ai and PLAI.chat both make anonymous use a core part of their pitch. Large vendors tend to use guest mode as a funnel into accounts, while smaller, privacy-positioned services treat it as the product. The practical rule is to rely on services that publish their logged-out numbers, because an undocumented cap can change without notice.