Perplexity AI is a search engine powered by artificial intelligence — instead of returning a list of links, it reads sources from across the web and gives you a direct answer with citations. If you have ever wished Google would just tell you the answer rather than making you click through ten websites, Perplexity is built exactly for that.
Launched in 2022 and now used by tens of millions of people worldwide, Perplexity has become one of the most practical AI tools available — particularly for research, current events, and anything where you need a verified, sourced answer fast.
How Perplexity AI Works
When you ask Perplexity a question, it does two things simultaneously: it searches the web in real time and uses a large language model to synthesise the results into a coherent answer. Every claim in the response is linked to a source, so you can verify what you are reading immediately.
This is fundamentally different from ChatGPT or Claude, which are trained on data up to a cutoff date and generate responses from memory. Perplexity is always working with live web data, which makes it far more reliable for anything time-sensitive — breaking news, current prices, recent software releases, and live sports results.
How to Use Perplexity AI
Getting started with Perplexity takes about thirty seconds. Here is how to use it effectively:
- Go to perplexity.ai — no account required for basic searches. The interface loads immediately with a search bar.
- Type your question naturally — Perplexity works best with full questions rather than keywords. Instead of “best NAS drives 2025”, try “what are the best NAS drives for a home server in 2025?”
- Read the answer and check sources — numbered citations appear inline. Click any number to see the original source page.
- Use Follow-up questions — at the bottom of every answer, Perplexity suggests related questions. You can also type your own follow-up to dig deeper without losing context.
- Switch Focus mode — the Focus selector (above the search bar) lets you restrict searches to specific sources: Web, Academic, YouTube, Reddit, or News.
- Try Pro Search — for complex questions, toggle Pro Search on. It runs a more thorough multi-step search and asks clarifying questions before answering.
Perplexity AI Focus Modes
One of Perplexity’s most useful features is Focus mode, which lets you restrict where it searches:
- Web — the default, searches across the entire web
- Academic — searches academic papers and research journals, with proper citations
- YouTube — finds relevant videos and summarises their content
- Reddit — searches Reddit threads, useful for real-world opinions and recommendations
- News — restricts results to recent news articles
The Reddit focus mode is particularly underrated — asking “what do people think of [product]” via Reddit focus gives you genuine user opinions rather than SEO-optimised review sites.
What Perplexity Is Good At
Perplexity excels at research tasks where you need current, cited information:
- Current events — news, market movements, recent announcements
- Product research — specs, prices, comparisons pulled from live sources
- Technical lookups — documentation, error messages, recent software releases
- Academic research — it can search academic papers and cite them directly
- Quick factual questions — anything where you want a direct answer rather than a list of links
- Medical and health queries — citations from NHS, medical journals, and trusted health sources
Perplexity Free vs Pro
The free tier of Perplexity is genuinely useful — you get unlimited standard searches with web citations at no cost. Perplexity Pro (around £17/month or £150/year) adds:
- Access to more powerful AI models (GPT-4o, Claude Sonnet, Sonar Large)
- 300+ Pro searches per day (deeper, more thorough responses)
- File upload support — ask questions about PDFs and documents
- Image generation built in
- Spaces for organised research projects
For most users, the free tier covers everyday search needs. Pro is worth considering if you use it heavily for research, work with documents regularly, or want access to the more capable AI models.
Perplexity vs Google
| Task | Perplexity | |
|---|---|---|
| Research questions | ✓ Better | Links to read |
| Current news | ✓ Summarised with sources | News tab |
| Finding a specific website | Slower | ✓ Better |
| Local results / maps | Limited | ✓ Better |
| Shopping | Basic | ✓ Google Shopping |
| Academic research | ✓ Much better | Scholar tab |
Many people use both: Perplexity for research and questions, Google for finding specific sites or local businesses.
Perplexity vs ChatGPT
The key difference is grounding. ChatGPT generates responses from its training data, which has a knowledge cutoff. It can browse the web but does not do so by default for every query. Perplexity searches the web for every response and shows you exactly where each piece of information came from.
For current information with verifiable sources, Perplexity is more reliable. For long-form writing, coding, creative tasks, and complex reasoning, ChatGPT or Claude are stronger choices. They serve different use cases and are both worth having.
Spaces — Perplexity’s Research Feature
Perplexity Spaces lets you create a focused research environment around a topic — uploading documents, setting context, and running multiple searches that build on each other. You can share Spaces with others, making it useful for team research projects.
Spaces is available on the free tier with limited file uploads. Pro unlocks larger files and more uploads per Space.
Perplexity AI on Mobile
The Perplexity app (iOS and Android) is well designed and works well as a day-to-day replacement for Google on your phone. Key features on mobile:
- Voice search — ask questions by speaking, get a read-aloud answer
- Widget support — quick access from your home screen
- Set as default browser assistant on Android for hands-free use
- Full sync with your web account — search history and Spaces carry over
Is Perplexity AI Safe?
Perplexity AI is safe to use for general research. It does not store personal data beyond what is needed for your account, and you can use it without creating an account at all. A few things worth knowing:
- Like all AI tools, it can occasionally misread a source or present information incorrectly — always check the cited sources for anything important
- It does not generate harmful content and has safety filters in place
- The Pro subscription is processed securely — standard payment handling
- If you use it for medical, legal, or financial decisions, treat the answers as a starting point and verify with a professional
Is Perplexity Worth Using?
Yes — particularly as a complement to Google rather than a replacement. For any research task where you want a direct, cited answer rather than a list of links, Perplexity is one of the most useful free AI tools available. The fact that every response includes sources makes it significantly more trustworthy than AI assistants that generate answers from memory alone.
Start with the free tier. If you find yourself using it daily for research, the Pro plan pays for itself quickly in time saved.
