Perplexity
Perplexity AIA research-focused assistant that searches the web, answers with citations and supports follow-up questions. A free tier is available; Pro plans add deeper research and more searches.
Research
Freemium
Category 051 entry
Research
Research tools search the web, synthesise what they find and — importantly — show their sources. They are useful for market scans, literature reviews and fact-finding, provided you follow the citations and verify claims yourself.
Reviewed October 31, 2026
Research entries
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