Perplexity AI Review
An AI-powered research and search engine that provides cited, sourced answers to complex questions. Combines LLM reasoning with real-time web search for accurate, up-to-date information.
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- Best for
- Researchers and professionals who need sourced, factual answers
- Pricing
- Free / £16/mo Pro / £159/mo Max Approx. GBP excl. VAT. Billed in USD — verify exact GBP price at checkout.
- Data residency
- US
- UK English
- Yes
Our in-depth review
Search that shows its working
Perplexity is best understood as a research engine rather than a chatbot. Ask a question and it searches the live web, synthesises an answer and — crucially — cites the sources inline so you can verify each claim. For UK professionals who need defensible, up-to-date information rather than the confident guesswork a plain language model can produce, that citation-first design is the whole appeal.
Strengths
Every answer comes with sources, which makes it far easier to trust and to fact-check than a standard assistant. It is fast, the interface is clean, and focus modes let you point it at academic papers, the web, or your own uploaded files. The free tier is generous, and for desk research — market sizing, comparing vendors, getting up to speed on an unfamiliar topic — it consistently saves time.
Limitations
Perplexity is built for facts, not creativity: it is weaker than ChatGPT or Claude at drafting, ideation and long-form writing. Switching between the underlying Pro models can be confusing, and — like any tool that summarises the web — it can occasionally misattribute or oversimplify, so you should still click through to the sources rather than trust the summary blindly.
UK data and GDPR
Perplexity processes data in the US but does not use your search queries to train models, and a data processing agreement is available for Enterprise. That is a reasonable posture for research use; even so, avoid entering personal or confidential data, and treat cited sources as leads to verify rather than gospel.
Key features
- Cited sources for every answer
- Real-time web search
- Focus modes (Academic, Writing, etc.)
- File upload and analysis
Pros & cons
What we like
- Always provides sources
- Excellent for research
- Clean, fast interface
- Generous free tier
What to watch
- Less creative than ChatGPT
- Pro model switching can be confusing
- Limited in creative tasks
GDPR & data residency
Where your data is processed: US
GDPR compliant. Privacy-focused; search queries not used for model training. DPA available for Enterprise.
Our verdict
We rate Perplexity AI 4.0 out of 5. It's best suited to researchers and professionals who need sourced, factual answers.
Visit Perplexity AI →Frequently asked questions
Is Perplexity free?
Yes, there is a capable free tier. Pro is around £16/month and unlocks more powerful models and higher limits; a Max tier sits above it near £159/month for heavy users.
Is Perplexity better than Google?
For research questions that need a synthesised, sourced answer, often yes. For navigational or local searches — finding a specific site or a nearby business — traditional search still wins.
Does Perplexity cite real sources?
Yes, it links the sources behind each answer. Always click through to confirm, as it can occasionally misattribute or oversimplify what a source actually says.