For replacing Google Groups, you should check out Groupsapces, a UK company. http://groupspaces.com/
A free plan gets you two lists of 50 members, and there are many paid options. I've been using it for a group in my local community for over a year now and am very pleased with the product.
A free plan gets you two lists of 50 members, and there are many paid options. I've been using it for a group in my local community for over a year now and am very pleased with the product.