Thanks for the community! If I can ask here - what Free Zone should I choose for my SaaS company? Can I apply myself?

A team I know is planning to raise capital in the near future and wants to set up a company in the UAE first. What’s the better option for them: to register on the mainland or in a free zone? What type of company should they choose? By the way, really glad I found this community, I’ve been searching for something like this for a while — thank you! Quick intro: I’m Head of Investor Relations at a large e-commerce company, and on the side I sometimes help start-ups with fundraising.