How To: Increase Your Mailing List with Premium Opt-in WordPress Plugins

Published on March 26th, 2015

Last Updated on April 19th, 2021


Share This Article

If you want to increase the number of your visitors that sign up to your newsletter or email list, getting creative with how you display your opt-in or sign-up forms is a good place to start. As building a list of subscribers is a great way to get repeat visits from what might have otherwise been onetime visitors, investing in a premium opt-in form plugin can be an easily justified cost.

Here is our pick of the best premium opt-in form plugins for WordPress that can help you increase your email subscribers:

Bloom Opt in Plugin

Bloom is the brand new opt-in plugin created by ElegantThemes, it has loads of cool features such as create popups, fly-ins forms, in-line forms, forms below your content, widget signup forms and optins which require a signup to unlock content.


Ths plugin is integrated with 12 popular mailing list services :

  • Aweber
  • Mailchimp
  • Campaign Monitor
  • Constant Contact
  • Mad Mini
  • Infusion Soft
  • iContact
  • Get Response
  • Mail Poet
  • Feed Blitz
  • SendinBlue
  • Ontraport
  • Full Details │Price: from $89 Includes access to 80+ theme an all plugins


This is the plugin that we use here on WPLift and have seen a great increase in the number of Newsletter subscribers since we started using it. It has a really easy to use interface for creating your popups with a WYSIWYG interface and a number of pre-made templates that you can choose from. You can also choose different types of optins – light box, footer bar, slide-in, sidebar widget and after-post widget.


You can also perform split-tests with multiple optins so you can easily judge which performs best for your site.



Article Continues Below

MailOptin is a powerful opt-in plugin that comes in both a free and Pro version. To help you build your list, it lets you create a variety of opt-in forms at different spots on your site.

In the free version, you can create:

  • Popups
  • Before/after post content forms
  • Sidebar opt-ins with widgets

And if you’re willing to pay for the premium version, it also adds support for bottom/top bars and slide-ins.

All the different form types come with 3-8 templates that you can further customize as needed.

To let you make those customizations, MailOptin uses the real-time WordPress Customizer. It’s not a drag-and-drop builder, but it is really convenient and easy to work with.

To trigger the popups or slide-ins, you get several different options for:

  • Exit-intent
  • Time on site
  • Scroll depth
  • Page views

Once you actually publish your opt-ins and make them live, MailOptin can help you do a few different things.

First, it includes detailed analytics that show you the performance of all your opt-ins.

It also includes an in-dashboard lead bank of all the people that fill out your form. While MailOptin does let you connect to external email marketing services, this lead bank is a nice alternative way to manage all of your subscribers.

You can also use it to send your own emails if you’re not already using an email marketing service.

Article Continues Below

Finally, MailOptin also offers A/B testing if you want to optimize your various opt-in forms.

  • Full Details │Price: Limited free version. Paid version starts at $69


Website owners of any ability should have no problems getting this premium sign-up form plugin setup on their site. With OptinSkin you can easily add attractive opt-in forms and social buttons button to any areas of your pages as you see fit. The plugin comes with 18 designs which can be fully customised, allowing you to change the colours and fonts as well as the icons and buttons.  There is also a built-in editor where you can make changes to the HTML and CSS used by the forms in order to create your own designs.

To ensure you are using the form which gets the most signups from your readers, you can also perform A/B split testing with this plugin to find the form with the highest conversion rate. Detailed stats are provided for the forms, which tracks impressions, conversions and other advanced tracking data.

To help catch the attention of your readers, the OptinSkin forms can be set to fade to full visibility when the reader scrolls down the page to where a form is located. This sign-up form fade effect is a great way to ensure your readers don’t suffer from opt-in form blindness when browsing your site.

OptinSkin Plugin

The ability to automatically display forms in-content on all pages, as well as the fade effect are two great reasons why this form is well-worth considering.

  • Full Details │Price: $67

Ninja Popups

While the other plugins so far have focused on displaying in-content forms, although some do also offer popups, the Ninja Popups plugin is solely focussed on allowing you to display pop-up opt-in forms to your readers. As the forms are displayed using a light box effect, rather than a browser pop-up window, they won’t be disabled by browser pop-up blockers and therefore should be visible to all of your readers.

This plugin can be integrated with all the main email newsletters services and auto responders and allows you to display pop-ups on page load, as well as on page exit. You can also assign different pop-ups to specific pages enabling you to further target your opt-in forms and subscription incentives.

Ninja Popups for WordPress

There is also an extra themes pack available to increase the number of templates at your disposal, all of which are responsive for use on smartphones and tablets.

Article Continues Below

Gravity Forms

Gravity Forms does so much more than simply creating opt-in forms for email newsletters. However, it is a worthy addition to this list due to its ability to let you design your own sign-up forms so easily. While this product excels at letting you create and design multi-page forms, as well as forms with conditional logic and order forms that make calculations based on the selections made, its advanced form builder gives you lots of control over how your opt-in forms will look.

Gravity Forms

While some of the extra features of this WordPress form plugin might be overkill for those only wanting an opt-in form, for anyone with more advanced form requirements Gravity Forms comes highly recommended.

Subscribe to Unlock Plugins

In addition to the premium opt-in form plugins that simply display a sign-up form, there are a growing number of ‘subscribe to unlock’ plugins for WordPress. With these plugins content on the website is locked or hidden from the reader and not made available until they subscribe to the mailing list. This locked content could be excerpts from a post, entire posts or pages, or even whole categories.

Whether you want to go down the route of effectively forcing your readers to enter their email address in order to access your website’s content is a decision you will have to make for yourself. It is a risky strategy as the content will need to be of high value to the reader. There is a good chance of losing any goodwill you had with your audience by forcing them to perform an action before being able to view your content.

If this does sound like something you would like to implement, these are some popular plugins that can add this functionality to your site:

Which Opt-in Plugin?

There are two plugins which stand out for me which I have also personally tested, that is Bloom the new plugin from ElegantThemes which is beautifully designed and has loads of different features for different types of opt in forms, popups and boxes. The other recommended plugin is OptinMonster – again it has loads of customization options, A/B testing and so on. Both plugins have been used here on WPLift to great effect so I would recommend either of those.

Joe has been using WordPress for many years and spends his time creating content for a wide range of websites and blogs. If you need compelling content for your blog, visit his freelance services portfolio now.