You can always use https://github.com/salesforce/CodeGen . But it does require managing the model hosting. You can use fauxpilot to mimic copilot functionality https://github.com/fauxpilot/fauxpilot

IMO Copilot for Business has a very reasonable data collection policy. They discard any code snippets once the suggestion is returned.

https://github.com/features/copilot

If that's the case, would co-pilot be useful anyway? Or are you off the range where suggestions wont help?

In theory there are no rules about importing code, beyond the usual licensing issues. But people use SO and such all of the time, right? If one *really* wanted to do a global audit of improperly imported code, we'd all have bigger problems. So from that perspective it's status quo.

But I don't want to be the person caught uploading proprietary code to another company's servers.

It's not a major issue, and I doubt it'd ever be a practical problem. But fear of punishment keeps me away.