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The Best Email List Building Tools You Need to Be Using in 2021

What if you could streamline email marketing with the press of a button?

Throughout the years, email marketing has remained one of the most effective tools a business has. But here’s the rub: while email marketing is effective, building your email list can be very difficult.

Unless you have the right tools, that is. That is why we have assembled this guide to the best email list building tools available. Keep reading to discover how to take your email marketing to the next level!


Do you not mind personally taking care of most of your email marketing needs? In that case, GetResponse may be the tool you’ve been looking for.

The primary “downside” with GetResponse is that it doesn’t offer the same kinds of automation tools rival apps like ActiveCampaign have to offer. But there are autoresponse options to help you stay engaged with your email list, and this app also makes it very easy for you to craft killer emails and newsletters.


We’ll be the first to say it: “Optimonk” isn’t exactly a title that easily rolls off of your tongue. But it is definitely one of the best potential email list building tools in your arsenal.

What we like about Optimonk is how versatile it really is. When it comes to email list building, this app makes it easy to detect existing visitors as well as target previous visitors to your website. This can help you optimize your targeted offers and seriously improve your conversions.

Once you have a solid list built, Optimonk can also help you run analytics to track the progress of your marketing and run A/B tests to see which approaches are most effective for your audience.


Does your website run on WordPress? If the answer is “yes,” then MailMunch is a “must-have” tool for your email marketing needs.

MailMunch has a very robust free version, and the paid version offers even more themes for you to choose from. But no matter which version you choose, the real potential this app offers is the ability to add a top bar and side forms to your website.

Those forms are handy when visitors to your site are reading longer content such as your blogs. With these forms, you can collect email contact info at any point, and all without disrupting your audience’s reading experience.


“SumoMe” may sound like an intimidating challenge. But once you get this app going, it will be your business that is “sumo wrestling” the competition into submission.

What we like about SumoMe is that it makes different aspects of email marketing easier. For example, this app helps you capture email contact info in some of the same ways that MailMunch does. But SumoMe also provides additional apps that can help with things like increasing your web traffic, and this is particularly useful for newer businesses.

We also like that SumoMe offers plenty of free functionality, and you can always pay for enhanced versions of individual apps once you know if they are useful or not.

Thrive Leads

Thrive Leads is another great app designed for individuals and businesses that use WordPress. In short, it was designed from the ground up to collect email addresses from everyone who visits your site.

On top of that, though, Thrive Leads provides additional tools to help you convert those leads. This is especially important because email list building is only part of the equation. The rest of the equation is transforming those email addresses into sales!


Speaking of conversions, ConvertPlug is optimized for converting leads from your website. And this tool arguably works best for small to mid-level businesses that are seeking to grow.

That is because ConvertPlug offers very competitive prices and very intuitive features for your business. And it will scale to your email marketing needs, keeping up with you even as your business reaches its full potential.

Best of all, this app is useful for turning your most loyal customers into brand ambassadors who will sing your praises on social media. That means you can grow your social media marketing presence even as you focus on building a solid list for email marketing.

Hello Bar

Hello Bar is an app where the functionality is right there in the name. In this case, this handy app helps you add a scrolling header bar to any parts of your website.

As with the tools that add forms to your website, this helps you easily capture emails from those who are visiting your website. And there is a great degree of customizability: you can change color and placement as easily as you can change the text.

Perhaps the sleekest feature is that you can make sure only certain visitors see the bar. This helps you target certain demographics with particular messages to maximize conversions.

PopUp Domination

Many of the email list building tools help you collect email addresses while someone reads your site. But what if you could collect those addresses before they even landed on your page?

PopUp Domination focuses on one thing: providing non-intrusive pop-ups to gather information from those who visit your site. Additionally, this app makes converting those leads easier and more intuitive than ever before.

In other words, you and your visitors get the best of both worlds. You get the addresses you need for your email list and your customers get to enjoy a website without any annoying distractions!

Email List Building: Your Next Move

Now you have some of our favorite tools for email list building. But do you know which tool can help you start gathering all the addresses you need right away?

Here at PopUp Domination, we have been stretching the boundaries of what businesses can accomplish with the right pop-up ads. To see what we can do for your own business, check out our different pricing plans today!