What is the best accounting software to use with an outsourced accountant and why?

Hello everyone,
I am the owner of a small business and I am looking to outsource my companies bookkeeping, accounting, and data entry. I am wondering if anyone has experience on this matter and can provided some insight on what accounting software is best to use when outsourcing, what website is best to hire from, and any other insights you can think of?
Thank you in advance