Perplexity AI

The "answer engine" that's replacing Google for research queries. Perplexity searches the web in real-time, synthesizes results, and provides sourced answers with inline citations — eliminating the "10 blue links" model that Google has used since 1998. At $20/month (Pro), it uses GPT-4, Claude, and its own models to provide deep research with sources you can verify. Usage grew from 10 million to 100+ million monthly queries in 2024-2025. The key differentiator: every claim has a clickable citation, which builds trust that pure chatbots lack. Jeff Bezos and NVIDIA invested in the $3 billion valuation.