MailOptin

Plugin · Free + paid

10,000+ active installs · Rated 4.8/5 · Updated October 13, 2026

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A WordPress plugin for building popups, optin forms, notification bars, slide-ins and user registration forms to grow an email list. It can also send new blog posts to subscribers as email newsletters and connects with common email marketing services. It suits bloggers and businesses collecting leads on their site. A free version covers the basics, and paid plans add more features and integrations.

Pros

  • Popups, opt-in forms, notification bars and slide-ins
  • Blog posts sent as email newsletters
  • Connections to many email and CRM services
  • Shortcodes and a block for placing opt-in forms

Cons

  • Premium themes and some features need the paid version
  • Many outbound connections to third-party services
  • Large codebase with many shortcodes and email templates

Topics: Lead Generation plugins

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