Association Membership management system and squarespace

Which software do you use to run your membership sites?

Can Squarespace do it all?

I run the system for an association with over 400 paid members.

The system is WildApricot, which i find to be very limited, hard to design with and outdated.

It plugs into a Wordpress site and it's all very messy.

I would love to move over to Squarespace. But I need to find a better member management software and see examples of how this is handled in Squarespace.

Thanks for your thoughts on this.