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Claude

Freemium

Claude is Anthropic's AI assistant, known for careful reasoning and long-context work. It is particularly strong at reading and summarising long documents, analysing codebases, and producing structured, well-edited prose. The web, desktop and mobile apps share Projects, which keep reference material and instructions together for recurring work. Claude supports file uploads, image understanding and tool use, and the API offers tiers from small, fast models to the largest for complex reasoning. Business plans add higher usage limits and admin controls. Teams that work with lengthy contracts, research papers or large code repositories tend to prefer it for its accuracy and measured tone.

Perplexity

Free

Perplexity is an AI answer engine that responds to questions with a synthesised answer and inline citations to the sources it used. Instead of a list of links, you get a short, readable summary you can verify by clicking through to the underlying pages. It supports focused modes for academic papers, news and community discussions, and Pro search runs multiple follow-up queries for deeper research. Free users get a limited number of Pro searches per day; the paid plan raises limits and adds stronger models. Collections let you save and share research threads. It is most useful for fact-finding, market research and anything where you need to check where an answer came from.