Podia

Podia bundles courses, memberships, digital product sales, and email newsletters into a single platform designed for creators. You can build communities, sell access to content, and email your audience all without integrating separate tools or paying multiple vendor fees.

Excellent if you're selling digital products or memberships alongside newsletters. The integrated approach means fewer logins and a cohesive experience for your audience, though it's overkill if you only need newsletter functionality without the course or product selling features.