Perplexity AI
An AI search engine built around cited sources
United States Startup Closed
WHAT IT IS
Perplexity AI was founded in 2022 and offers a search engine presented as question answering. It attaches citation links to answers, merging retrieval and generation in a single interface.
Why it matters
It made "question answering with citations" the core of the product, becoming the best-known consumer form of retrieval-augmented generation and turning "AI search" into a track of its own.
Key milestones
- 2022
Founded and launched the product