A full AI assistant — writing, images, web search, memory, file uploads — where every conversation is end-to-end encrypted on your device, so the company says it cannot read your chats, train on them, hand them to partners, or produce anything but scrambled text in response to a subpoena. Built by Moxie Marlinspike, the cryptographer who created Signal. Free to start with no credit card; the encryption and private inference designs are written up publicly and the code is open source so the claims can be checked.
Why I recommend it: This is the one to reach for when you are about to type something into an AI that you would not want read back to you — money trouble, health, a manager, a visa problem. Two honest things. It is free to start, which is not the same as free forever, so read the plan page before you rely on it. And encryption protects the message, not your judgment: anything you paste in that belongs to an employer or a client is still their information, whoever can or cannot read it.
A free 2025 paper by Mallory Knodel, Sunoo Park, Kyunghyun Cho and colleagues at NYU and Cornell examining whether AI assistants and end-to-end encryption can honestly coexist. It covers two cases — putting an AI assistant inside an encrypted app, and training models on encrypted data — sets out where each breaks the security promise encryption makes, works through the legal consequences when a provider keeps saying "end-to-end encrypted" anyway, and ends with concrete recommendations on default settings, consent and what providers may truthfully claim.
Why I recommend it: Read the recommendations section even if you skip the cryptography. It gives you the exact questions to put to any product that advertises both an AI helper and private messaging — where does the processing happen, what is the default, and what were you actually asked to agree to. Two flags: it is posted to a preprint archive, so it has not been through journal peer review, and the authors published plain-language summaries on the NYU DeTaIL Lab blog and Tech Policy Press if the full paper is heavy going.
A free way to use several well-known chat models — including ones from OpenAI and Anthropic alongside open models like Llama and Mistral — without an account and without the model provider seeing who you are. DuckDuckGo strips your identity and passes the request on, and says the providers agree not to train on what goes through it. Supports image and PDF uploads, image generation and voice chat, with daily limits on the free tier.
Why I recommend it: The most frictionless privacy win on this list: no sign-up, nothing to cancel, and it takes about four seconds to start. Good for the everyday questions you do not want attached to a profile. Be clear about what it does and does not do — DuckDuckGo hides who you are from the model provider, but the words you type still travel to that provider's servers, so it is not the same as encryption or running a model on your own machine. There is a paid upgrade for higher limits.
A practical guide to using AI chatbots without handing over everything you tell them, built on interviews with Johns Hopkins cryptographer Matt Green and Signal creator Moxie Marlinspike. It explains why a chatbot is a better honeypot for your secrets than text messages ever were — most are set by default to store what you say, with few limits on training, sharing, or handing it to a court — and walks through the options that actually reduce the exposure.
Why I recommend it: The clearest plain-language explanation of why this matters, and the best thing to read before you pick any of the tools above. Marlinspike's line is the useful one: the private things people used to text are now the things they tell an AI, and the protections have not caught up. One flag — WIRED meters free articles, so if you hit a sign-in wall, tell me and I will note it on this entry.
An AI chat and image tool built on open-source models that keeps conversation history in your own browser rather than on its servers, and offers a choice of privacy modes including trusted execution environment and end-to-end encrypted options. It also applies no content filtering, which it calls uncensored. The free tier is real but small: base models only, 10 text prompts and 15 image prompts a day. Paid plans start at $18 a month.
Why I recommend it: Worth knowing about mainly for the privacy modes and the model choice — it is one of the few consumer tools that tells you which protection each model is running under. Three honest flags. Ten prompts a day is a trial, not a working tool, so do not build a habit on the free tier. "Uncensored" means no safety filtering, which is a genuine reason some people want it and a genuine reason to keep it away from a shared or work machine. And Venice runs a crypto token alongside the product, which has nothing to do with whether the AI is any good.
Research, guides, reports, and customer stories on AI governance, agents, data protection, and generative AI security.
From the site: Explore Harmonic Security AI resources: research, guides, reports, blogs, and customer stories on AI governance, agents, data protection, and GenAI security.
Why I recommend it: Free resource library from Harmonic Security; the company also sells enterprise AI security products.
404 Media reports on leaked internal documents showing that human reviewers read ChatGPT prompts to improve OpenAI's models — including chats that hold sensitive personal information. Useful context before you paste private details into a chatbot.
Podcast interview with Maheen Khan (Invisible Institute) and Patrick Ball (HRDAG) on a coalition helping nonprofits protect evidence, cut big-tech dependence, and build independent AI capacity.
Why I recommend it: A concrete example of mission-driven tech work — good listening if you want your technical skills pointed at justice organizations.
