Embed Sendy allows you to embed subscription forms for Sendy through different methods, including a widget, shortcode, or as a Gutenberg block.

• Support multiple lists, so you can offer subscription for different lists in different scenarios
• AJAX submission for forms, option to enable/disable
• Comes with default form styles, with option to disable
• Automatically add the subscription form before/after each post or page.
• Add content to before/after form

I am aware that there are a number of plugins already available for Sendy. Embed Sendy focuses on flexibility add the form in different scenarios where it can be useful and convert more subscribers.