What is Perplexity?
Perplexity is an AI-powered answer engine. Instead of returning a page of links, it searches the web as you ask and writes a conversational answer that cites the sources it used, so you can open them and check. You can ask follow-up questions in the same thread. Perplexity's help centre describes standard Search alongside more advanced modes such as Pro Search and Deep Research, and says it lets users choose between AI models from several providers. It is available on the web, desktop and mobile. Citations make checking easier, but they do not guarantee that a summary is accurate or complete.
Best for: Researchers, students and professionals who want quick overviews with sources they can follow up.
Useful for
Topic overviews
Get a sourced summary of a subject before reading deeper.
Fact-finding
Ask a specific question and follow the citations to the original pages.
Iterative research
Refine a question with follow-ups without starting a new search.
Key capabilities
- Searches the web in real time for each question.
- Answers include citations linking to their sources.
- Follow-up questions keep the context of the thread.
- Standard Search plus advanced modes such as Pro Search and Deep Research.
- Choice of AI models from more than one provider.
Limitations and considerations
- Citations still need checking: a source may be misread, outdated or not support the claim.
- Advanced modes and model choice depend on plan.
Pricing model
Free with paid options
Free to use, with paid Pro and higher tiers.
Current prices on the official siteCommon questions
- How is Perplexity different from a search engine?
- It writes a direct answer that synthesises several sources and cites them, rather than listing links for you to read.
- Is Perplexity free?
- It can be used free, with a paid Pro plan and higher tiers offering more advanced features. Check the official Pro page.
- Can I trust Perplexity's citations?
- They make verification easier, but you should open important sources and confirm they say what the answer claims.
Sources
Curated from official product and pricing pages. Not hands-on tested by Pithmark.
