Yes. Comparing options puts you under no obligation. You can decline every offer, decline one and take another, or stop the process entirely, at any point before you sign with a funder.
There is no fee for declining, no fee for changing your mind, and no penalty for coming back later.
Once you have signed a funder’s agreement, that agreement governs. Any cancellation or early settlement terms are the funder’s and are set out in their documentation, so read them before you sign rather than after.