Perplexity AI
Perplexity AI answers a question by searching the web and citing the sources behind each statement. Published by Perplexity, the service runs in the browser and in mobile applications, keeps the thread of follow-up questions, works with uploaded files, groups related work into projects, and lets a learner choose which model answers.
Limits of the Free Tier Plan: The free plan answers questions with cited sources in the browser and in the mobile applications, with lower allowances for uploaded files and a smaller choice of models. The paid Pro and Max subscriptions give deeper research, access to all the models offered and higher upload limits.
How It Helps Your Business English
The page opens a single box asking what you want to know, with a choice between a straight search and a longer working mode, a model selector, and the option to work inside a project. A side panel holds past sessions, artifacts and automations, and suggested questions sit below the box.
You ask a question in the words you would actually use, and the answer comes back with its sources beside it, so you can see how a published document phrases the same idea. Following up in the same thread holds the subject while you try a different way of asking. Reading the cited pages gives you the vocabulary of the field rather than a paraphrase.
ESLBusiness.com earns no commission if you upgrade to a paid plan.