Yes, you can use Donorbox to raise funds even if you are not a nonprofit organization. Many for-profit businesses, big and small, have raised donations for charitable causes or research projects. You can even register as an individual for your personal causes.
When signing up for your Stripe account, please choose the Individual / Sole Proprietorship option as the "Business Type" if you are an individual raising money for personal causes.
This is the option many people use when they want to process transactions as an individual and not a registered company. You can also check this article here to learn more about the process, and we also recommend you to check directly with Stripe. You can contact Stripe through this link, or you can email them at firstname.lastname@example.org.