Millions?
There are maybe 30-60 million software developers and software developer adjacent people on this planet. Out of those probably 30% are late AI adopters, laggards, that haven't even used a terminal client and some don't even use AI.
Also a lot of people - developers included, just don't like command line tools.
Then pi is a secondary harness after Claude, Codex, OpenCode. I imagine the likelihood of pi having more than a few hundreds of thousands of users is remote. It's basically the Emacs or Vim of harnesses.
We package Pi w/ Qwen3.6 35B-A3B configures with our software, we're ramping up close to 500 clients, so there is our contribution.
You don't think that millions of people use vim and emacs? Out of 30-60 million software people?
It's a dependency of OpenClaw. Everything else aside, that's ~390k likely users minimum due to the auto-starring.
Though, I realize now the "hundreds of thousands" claim I was responding to is per week, while my guess is all time.