Ithy combines independent AI answers with cited web sources. Free plan with 10 answers a month; Pro is $20/month or $120/year. See features and verdict.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Ithy, short for "I Think Why," is a web app for researching questions with several AI models at once. Rather than returning a single model's reply, it combines web research and independent AI perspectives into one article that the reader can inspect, save and share.
The product is built around evidence. Answers come with linked, ranked sources and relevant visuals, and in Deep Research the full response of each model can be read next to the combined article. Ithy's help center is direct about limits: sources are there to support your own checking, and agreement between models does not guarantee that a claim is correct.
A user enters a specific question and picks a mode. The help center suggests including the context, audience or decision that matters. Sources and model responses appear as they become available, followed by the combined article.
Fast Research uses Claude Haiku 5.5 for one focused answer with web sources. Deep Research compares independent researchers, GPT-6 Luna and Claude Haiku 5.5 on the Standard plan, and a final writer combines their work. Writing and visual preferences apply to both modes, so the output can be tuned to a particular audience, level of detail and format.
The core of the product is the comparison of perspectives. Users can read each model's full response, explore cited passages and ranked sources, and view relevant pictures or videos where available.
Ithy also works as a lightweight research library. Answers can be kept in folders, shared, and downloaded or exported. Account preferences allow up to 2,000 characters of writing instructions covering audience, detail, tone and format. The app can be installed on a phone or computer from a supported browser, with the same account and library everywhere. The site lists a number of reading languages, including Spanish, French, German, Japanese and Chinese.
Ithy, short for "I Think Why," is a web app that combines web research with independent AI perspectives into one answer. Users can inspect the sources, save the result and share or export it.
Ithy has a free Standard plan with 10 answers per month. Ithy Pro costs $20 per month or $120 per year billed annually, which the site says equals $10 per month.
Yes. A free account includes 10 answers per calendar month, and guests can try five answers without an account. The help center also describes trials of up to 200 answers, one per person and payment method, when an eligible offer is chosen at checkout.
Fast Research gives one focused answer from Claude Haiku 5.5 with sources. Deep Research compares independent AI researchers, shows their full responses and produces a combined article.
Pro adds a third independent researcher, Claude Sonnet 5.5, and uses ChatGPT 6.1 Sol to write the final article. It also includes broader web evidence, 1,000 answers per month and questions up to 100,000 characters.
Yes. Ithy is a web app that can be added to the home screen on iPhone, iPad and Android, or installed from Chrome or Edge on Mac and Windows. It uses the same account and library, with no separate app subscription.
Monthly limits reset on the first day of each month at 00:00 UTC, not on the billing date. Deleting an answer does not restore its allowance.
No. The help center says sources are there to support your own checking and that agreement between models does not guarantee a claim is correct.