
Perplexity
PerplexityBot, Perplexity-User
Perplexity is an AI “answer engine”: it searches the web and writes an answer with links. PerplexityBot indexes pages; Perplexity-User fetches a page when someone's question needs it.
Worth knowing: in 2024 and 2025 journalists and Cloudflare said Perplexity also read pages that had blocked it, using visitors that didn't give its name. Perplexity disputed this.