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.
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’re 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.
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
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) adds:
- Access to more powerful AI models (GPT-4o, Claude, Sonar Large)
- More Pro searches per day (deeper, slower, more thorough responses)
- File upload support — ask questions about PDFs and documents
- Image generation
For most users, the free tier covers everyday search needs. Pro is worth it if you use it heavily for research or need the more capable models.
Perplexity vs Google
Google is still better for navigational searches (finding a specific website), shopping (Google Shopping is more comprehensive), and local results (Google Maps data). Perplexity is better for questions where you want a synthesised answer rather than a list of pages to read through.
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, and complex reasoning, ChatGPT or Claude are stronger choices.
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. It is a useful feature for ongoing research projects where you want to keep related searches together.
How to Get Started
Perplexity is available at perplexity.ai — no account required for basic searches. The mobile app (iOS and Android) is well designed and works well as a replacement for Google on your phone for research queries. Creating a free account lets you save searches and access your history across devices.
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.
