Yes! With most stock option plans, you can issue equity to your international team members just like you would to your US team members. As long as someone has a service relationship with the company they’d be eligible to receive stock grants like any other employee. Someone being a contractor satisfies that test too.
The main difference is that you’d issue NSOs, not ISOs.
Non-qualified stock options (NSOs) are a type of stock option that does not qualify for favourable tax treatment for the employee. Unlike with incentive stock options (ISOs), where you don't pay taxes upon exercise, with NSOs you pay taxes both when you exercise the option (purchase shares) and sell those shares.
Pilot doesn't handle the actual issuance of equity. This must be handled by a law firm.