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ChatGPT and Gemini are the two options whose official help pages explicitly describe browser use without signing in. ChatGPT offers a temporary conversation where available; Gemini supports some basic text interactions but with several feature limits. Perplexity is worth checking if you want cited answers, but its current guest access is not confirmed by the official overview available here. Access can vary by country, device, and product changes, so check the service directly before relying on it.
Which AI assistants can you use without signing in?
The best choice depends on what you need to do and whether the service offers guest access where you are. OpenAI documents logged-out ChatGPT use in supported countries, while Google documents a limited set of signed-out Gemini features. Perplexity describes free search and chat but does not state on its overview page whether an account is required for current browser use.
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| Service | What the available evidence says about signed-out use | Key limitation |
|---|---|---|
| ChatGPT | OpenAI says users can try ChatGPT before creating an account in supported countries. | One conversation at a time; it is not saved to chat history and remains available only in the current browser session. |
| Gemini | Google says some Gemini web-app features work without signing in, generally including informational questions and simple text generation. | No past chats or personalized responses; Connected Apps, image generation, Gems, and file uploads are unavailable when signed out. |
| Perplexity | Its official site describes free core search and chat with cited answers, but does not establish whether current browser access works without an account. | Verify guest access directly; a 2025 study is historical evidence, not a current guarantee. |
ChatGPT: a temporary logged-out conversation
OpenAI says ChatGPT can be used at chatgpt.com before creating an account in supported countries. The feature is rolling out and is not available to users in Europe except the UK, according to OpenAI’s Help Center article on the ChatGPT home page.
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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Logged-out use is suited to a one-off question or short task, not work you expect to pick up later. OpenAI says you can have one conversation at a time; it is not saved to chat history and remains accessible only in the current browser session. Starting a new chat makes the current logged-out conversation inaccessible.
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Gemini: basic text tasks, with advanced features gated
Google says some features of the Gemini web app are available without signing in. Signed-out users can generally ask informational questions or generate simple text, though Google notes capabilities may change. Availability can depend on location and device.
Without an account, you cannot access past chats or personalized responses, and you cannot use Connected Apps, image generation, Gems, or file upload. Google’s Gemini Apps Help also says some users and features require an account. It notes that Gemini may use general location, or precise device location if permitted, to provide more relevant responses.
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Google’s help center warns: “Gemini Apps can make mistakes. When using Gemini Apps, double-check responses and don’t rely on responses from Gemini Apps for professional advice.”
Perplexity: cited answers, but check whether guest use is available
Perplexity’s official overview presents cited answers as a core feature and says free users get core search and chat. It does not say whether signing in is currently required to use the web app, so those details do not establish account-free access.
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A 2025 USENIX Security Symposium study reported that Perplexity was the only browser assistant in its tested set that could be used with or without an account. That finding describes the study’s tested configuration at that time; it is not a current access guarantee. Check Perplexity in your browser before choosing it specifically to avoid signing in. The study is available from USENIX Security Symposium.
Choose based on the task, not a universal ranking
- For an occasional prompt where available: Try ChatGPT if a temporary conversation is enough and you are in a supported location.
- For simple text or informational questions: Gemini may work signed out, but it is not a substitute for account access to its connected or file-based tools.
- For cited answers: Perplexity’s service overview highlights citations, but confirm that guest access still works for you before using it as a no-sign-in option.
- For ongoing work: Neither ChatGPT’s logged-out session nor Gemini’s signed-out mode provides past-chat access, so do not rely on them to preserve work.
Access prompts and feature availability can change. Confirm in the country and on the device where you plan to use the service; an account-free experience described for one location or earlier test may not be available to you.
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Privacy considerations when using an assistant without an account
Not signing in does not mean your prompts are unprocessed or private by default. OpenAI’s help page says chats are used to train models by default and advises against sharing sensitive information. It also describes an opt-out setting for logged-out users; that setting is tied to the browser and resets if cookies, the browser, or the device changes. See OpenAI’s current help guidance for details.
Before entering personal, confidential, or work-sensitive information into any assistant, review that service’s current data terms and settings. Avoid sharing sensitive material unless you understand how the service handles it.
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