Apps similar to PostGate include Paid Memberships Pro, which is open source with a free version. Other options are Restrict Content Pro, s2Member and MemberPress. In total there are four apps like PostGate for self-hosting.
Paid Memberships Pro offers a complete membership solution for WordPress featuring unlimited levels, recurring payments, registration & profile fields, protected member content, robust member management and more.
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A complete membership solution for WordPress sites. Create unlimited subscription levels, manage members, track payments, offer discounts, and more.
The s2Member® Framework (free) integrates with PayPal Website Payments Standard (also free). Sell "Buy Now" or Membership access to your site. Restrict access to Roles, Capabilities, Posts, Pages, or anything else in WordPress.
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MemberPress is a full-featured membership solution for WordPress that's very easy to use but still incredibly powerful.
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