Did you know that email marketing is estimated to be 40 times more effective for acquiring new customers than Facebook or Twitter and that you’re six times more likely to get a click-through from email campaigns than from tweets? There’s no denying it. Email marketing is a must for businesses.

But how do you get people on your list? One way is to ask for their email when they land on your site, either through pop-up forms or sidebar widgets-usually in return for something great, such as a discount or a free digital gift. Attract web visitors to your contact form on your WordPress website with one of these amazing plugins.

1. Bloom Email Opt-In by Elegant Themes

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Bloom is an opt-in form plugin that gives you tons of customization options to help you boost conversion rates. Start by choosing your newsletter provider to easily integrate your list with the form on your site. Bloom allows you to integrate with the best email marketing services, including Aweber, Mailchimp, GetResponse, Constant Contact, and more. Then, design your beautiful, customized sign-up forms. Choose from six display types, including:

  • Pop-up
  • Fly-in
  • Inline
  • Below Content
  • Widget Area
  • Required to Unlock

Customize each display type with your choice of colors, images, and text, or choose from the 100+ templates. You can even decide when to display the subscription form, such as after a certain amount of time, after someone leaves a comment, or after someone begins scrolling. Users can also perform A/B tests, track accounts, view statistics, and even target specific posts and pages.

Bloom comes with the Elegant Themes’ membership package, which includes over 80 themes and five other great plugins for your WordPress site, all for a $249 one-time fee.

2. List Builder 3 by SumoMe

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SumoMe features a wide range of tools for helping you grow your site traffic, from heat maps to share buttons. Along with these tools comes a list builder plugin that claims to help increase your daily email signups by 20 percent. With the List Builder 3 plugin, it’s easy to create amazing opt-in forms with advanced drag-and-drop functionality.

Customize your form to pop up at specific times, such as on a timer or just before a visitor leaves the site. And, of course, you can customize the colors, fonts, and more to match your opt-in form to your site’s design. SumoMe boasts its mobile-friendly design so that you can easily capture mobile users’ emails.

This plugin also features advanced functions like A/B testing, targeted opt-in forms, and integration with the top email marketing services. Try SumoMe free, and then upgrade as your traffic grows. Premium plans range from $29 to $119+ per month.

3. OptinMonster

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OptinMonster is another powerful tool that will help you capture leads, perform A/B tests, and analyze your statistics. With numerous types of forms to choose from-from popups to floating bars to sidebars-there’s something here for every page on your site. Plus, you can set up each form to target specific pages to increase conversions and segment your list.

OptinMonster boasts integrating with the most email marketing services, and they work with all types of websites and eCommerce platforms. It only takes minutes to set up, and you’ll be in good company with over 300,000 other websites that use the plugin.

Whether you’re running a blog or starting a WordPress WooCommerce store, this plugin is a powerful option that’s sure to attract subscribers. Start for just $9 per month for one site, and enjoy amazing features like unlimited opt-in forms, A/B slip testing, reporting, and more. A 14-day guarantee promises your money back if you aren’t impressed by the software.

4. Thrive Leads by Thrive Themes

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Thrive Leads is a lot like the other options on this list designed to not only bring you beautiful opt-in forms but to deliver the wide set of advanced tools needed to boost your conversion rates. With Thrive Leads comes a drop-and-drag editor to make building the perfect forms easy.

Advanced targeting helps you improve engagement by showing the most relevant content to your visitors. You can also run A/B tests to see which forms perform best. Plus, get actionable insights and important metrics through reports that show you how your forms are performing.

Numerous options allow you to create popup, in-line, ribbon, content-lock, scroll mat, and multiple-choice forms. Animation and customization options make for eye-catching forms. You can always customize for interaction-based or time-based trigger options as well as show sign-up forms to visitors about to abandon your site.

Integrate with the most popular email marketing services, all without needing any coding or design knowledge. Pricing starts at just $19 per month for access to all of Thrive’s products, including themes, a content builder, and a testimonials plugin.

5. Optin Forms

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If you’re looking for a free solution to creating opt-in forms on your WordPress site, try the Optin Forms plugin. Use it alongside:

  • AWeber
  • iContact
  • MailChimp
  • GetResponse
  • MadMimi
  • Interspire Email Marketer
  • ConvertKit

While this free plugin is limited to five form designs, you can customize each for color and text so they match the look of your site. Choose where to place the form on pages and posts, or use a shortcode to add your form to a custom area on your site. Extra features like A/B testing and detailed reports are limited, but with a 4.9-star rating on WordPress.org, you can’t really go wrong with this one if you don’t want to spend too much money on beautiful, customizable opt-in forms.

With so many options to choose from, you’re sure to find a great piece of software fit for your needs. Which one of these opt-in form plugins will you start with?