Perplexity is an AI answer engine that searches the web in real time and returns direct answers with cited sources. Its Computer mode goes further, taking whole projects that the agent works through on its own to produce finished deliverables.

Key features:

Answer questions with citations from current web sources.
Hand off projects to Computer for polished deliverables.
Choose the underlying model for each query.
Organize threads and files into projects.
Run deeper research that reads many sources before answering.
Shop and compare products, or browse with the Comet browser.

Perplexity is available on the web and in mobile apps. Basic search is free, while paid subscriptions unlock more advanced models, Computer and higher usage limits.