Pi
A friendly personal AI for talking things through
Pi is a conversational personal AI built to help you think things through, prepare for a tough conversation, or plan your day in a supportive tone. It is free to sign up, and Pi itself reminds users to double-check important information.
Available on
Web
Pricing
Free (sign up for free on pi.ai); no paid plan listed
Free tier availableFree pricing
Price checked Oct 18, 2026
Visit Pi (opens in new tab)Compare with...