Perplexity

Perplexity is the closest thing to a research assistant that actually cites its work. Unlike ChatGPT or Claude, every answer includes inline source links — you can verify each claim in seconds rather than chasing references manually. The interface is cleaner than a search engine results page and the answers are synthesised rather than just indexed, which makes follow-up questions genuinely useful: Perplexity builds on the prior exchange rather than starting fresh each time.

The Focus Modes unlock the tool's real power. Academic mode restricts sources to peer-reviewed papers and academic databases — useful for literature reviews and fact-checks on scientific claims. Writing mode gives access to recent news sources only, useful for current events and breaking developments. Spaces let Pro users create shared research environments with custom AI instructions, useful for teams that repeat the same types of research regularly. The Pro plan at $20/mo includes GPT-4o and Claude integration alongside Perplexity's own model, giving you the best of both worlds for research tasks.