8 Great Email List Building Tools for Boosting Conversions

Created On:
November 25, 2022
Updated On:
May 23, 2024
Email list building tool

Want to try something other than cold emails in your email marketing strategy?

It’s time to narrow down your target audience by capturing a list of email addresses of your website’s visitors.

Xerox, a business in document technology, has seen 540% growth in its email list by using AddThis. Looks lucrative, right?

Take a look at the 8 most amazing list building tools for 8x conversions in no time. 

[Versatile Email List-Building Software]

1. SleekNote


  • Starts from $49 per month
  • Mobile-friendly pop-ups builder
  • Follows Google’s interstitials policy
  • Website visitors guide
  • A/B Testing


Sleeknote is the best email collecting tool out there for e-commerce. It collects emails from your targeted customers through discounts, giveaways, and newsletter pop-ups. 

Probably that’s why it’s popular as an outstanding pop-ups generator. You name the trigger or a page, and you will have the best personalized pop-ups based on the visitor’s activity. Not to forget, you can choose (drag and drop) from 110+ pop-up templates in multiple positions.  

It’s recommended for e-commerce.

Keeping in mind the mobile-friendly email marketing trend of 2023, Sleeknote has modified all features to be mobile-friendly. 

Leonardo, a Sleeknote customer, says on softwareadvice.com, “Pricy but such a solid tool”.


✅ Best popup tool

✅ Drag & drop feature

✅ 30-Day Money-Back Guarantee

✅ Personalization

✅ Real-Time Analytics


❌ Expensive

❌ No free trial

2. OptinMonster


  • Starts from $9 per month billed annually
  • Mobile-friendly 
  • 400+ readymade templates
  • A/B Testing


In comparison to Sleeknote, Optinmonster is an affordable tool. It was created by the founders of WordPress–Syed Balkhi and Thomas Griffin. 

Like Smartlead.ai, it is best known as lead generation software. The website showcases a wide range of features divided industry-wise–e-commerce, publishers, and agencies. So, one can shop accordingly. It collects emails from your target visitors through advanced targeting and behavior automation. 

Unlike Sleeknote, Optinmonster focuses only on newsletter popups but excels in them. You can also create full-screen takeovers, slide-ins, lightboxes, inline forms, and spin-the-wheel popups. The best part is the option to choose from 400+ pop-up templates.

It claims to improve leads by 600%.

Christian Pure, an Optinmonster customer, says on apps.shopify.com, “My recommendation is to buy from them during Black Friday when they are usually 30% off”.


✅ Affordable basic plan

✅ Best newsletter pop-ups

✅ Page-level Targeting

✅ Built-in Conversion Analytics

✅ 100% money-back guarantee within 14 days


❌ Lengthy signing-up process

❌ No free trial

3. GetSiteControl


  • Starts from $9 per month
  • Credit card free signup (for trial)
  • Mobile-optimized forms
  • Multiple targeting options 
  • 1000+ software integrations
  • A/B Testing


GetSiteControl is an important tool in the list-building market. It provides targeted popups, floating bars, and slide-ins to collect the contact details of your targeted customers.  

Unlike its competitors, GetSiteControl shines with both pop-ups and surveys. They claim surveys can increase sales by 170%. 

The best feature of this software is that it’s super easy to get started with. For non-tech founders and businesspeople, it’s one of the best options out there. With 1000+ software integrations and live-chat support, it’s smooth sailing for users. One can easily contact the support team 24x7.

Every plan includes all features, integrations, and beautiful templates.

The pricing increases depending on how many sites you’re using this software. So, if you’re looking for a conversion-boosting popup builder, try GetSiteControl. It’s one of the easiest ways to create stylish pop-ups to increase email subscribers, sales, customers, or survey responses

A GetSiteControl user says on g2.com, “GetSiteControl makes creating pop-ups and widgets pain-free”.


✅ Easy signing-up process

✅ Easy-to-use

✅ Affordable

✅ Custom Build Widgets


❌ Monthly payment option only

[Tools to Build Lists for Free]

4. MailMunch


  • Free plan
  • Starts from $9 per month
  • Mobile-friendly 
  • Versatile features


The highlight of subscribing to MailMunch is its “free plan”. It is best for solopreneurs and bloggers. The free plan covers 1 site but provides unlimited opt-in forms, advanced targeting features, and integrations. 

MailMunch Free Plan is recommended for solopreneurs and bloggers.

The only downside is the MailMunch logo inscribed on the forms. In that case, one can always go with their premium plan for just $13 per month. From Email Automation to Advanced Analytics & Reporting, it includes almost everything.

Suppose $13 per month sounds too pricey to you; just check out their Black Friday sale. They offer a whopping 50% discount on everything. 

MailMuch provides:

➡️ Interesting exit popups

➡️ Scroll Boxes

➡️ Full-screen covered pop-ups

➡️ Top Bar

➡️ Contact Forms that you can embed

Alex V., CEO of a small business, says on g2.com, “MailMunch was useful and cost-effective to me”.


✅ Awesome pop-ups

✅ Spin-to-win wheel

✅ Page-level Targeting

✅ Built-in Conversion Analytics


❌ Limited library of templates in the free plan

5. OptiMonk


  • Free plan up to 15000 page views 
  • Paid plans start from $39 per month
  • Personalized pop-ups 
  • A/B Testing
  • SMS phone number marketing list
  • 300+ customizable templates


If you have just started your business and are still tight in your pocket, I recommend signing up for OptiMonk. Its free plan is even better than MailMunch’s. It covers 1 domain with unlimited campaigns. 

The only limitation of using the free version is that it’s limited to 15000 pageviews.

OptiMonk Free Plan provides unlimited campaigns.

If your business includes 2 or more domains, go with the paid plans. Here’s a quick view with the plans, maximum domain numbers and pageviews.

Essential Plan ➡️ 2 domains, 30,000 pageviews 

   Growth Plan ➡️ 4 domains, 100,000 pageviews 

 Premium Plan ➡️ 10 domains, 500,000 pageviews 

In addition to growing your email list, OptiMonk also has a strong onsite targeting engine. It also provides segmentation options to improve user experience. 

With its 300+ templates, this is one of the best software to reduce card abandonment, guide casual visitors to purchase things and increase revenue quickly. 

Anik P., an OptiMonk user, says on getapp.com, “All in all, the user interface is really good. The customer support team is a real champion - very responsive, helpful, and lightning quick”.


✅ Affordable 

✅ Unlimited campaigns

✅ Built-in Conversion Analytics

✅ Provides a personalized shopping experience


❌ Insufficient pricing options

❌ Not suitable for right-to-left languages like Arabic

6. AddThis


  • Free
  • Bold pop-ups 
  • Customizable
  • Built-in Detailed Analytics


Want an email list building tool for free? Then try AddThis. It is one of the best email-capturing tools for building pop-ups, banners, and sliders. It captures emails of your targeting clients through subtle, floating banners at the top or bottom of your page. 

If you envision clear call-to-actions that don't disturb the visitors, AddThis is for you. It’s absolutely free.   

It’s FREE for everyone.

You can easily make customized banners and popups that match your branding with the help of this Oracle product. And all this is without any developer’s help. 

Amber L., a small business owner, writes about AddThis on g2.com, “Easy tools for your website”.


✅ Free 

✅ Unlimited campaigns

✅ Can track analytics

✅ Provides a personalized shopping experience


❌ Syncing issues

❌ Takes time to set up

[List Building Tools for WordPress ]

7. Ninja Pop-Ups


  • Starts from $24 
  • Scroll Triggers
  • Google Analytics Integration
  • Spit & A/B Testing
  • Drag and Drop Editor


Ninja Pop-Ups is one of the best user-friendly WordPress list-building plug-ins. It provides lightbox pop-ups, page-level targeting, and scroll triggers to collect the email address of your targeted customers.  

Best list-building tool for WordPress users.

It doesn’t have as many templates as the above products in the list, but it’s easy to use and convenient for WordPress users. 


✅ Easy signing-up process

✅ Easy-to-use

✅ Affordable


❌ Dated products

❌ Limited templates

8. ConvertPro


  • Starts from $87 per year
  • Mobile-friendly 
  • Google Analytics Integration
  • Spit & A/B Testing
  • Drag and Drop Editor


ConvertPro isn’t one of the best-in-biz products compared to the above products. On top of that, it doesn’t have monthly billing or free trial options. So, if you’re new to using list-capturing software, I recommend you try something from the above products. 

But if you’re comfortable paying annual pricing and using WordPress, I think ConvertPro is a good option. It provides a drag-and-drop editor to create beautiful pop-ups by yourself. Their brand-matching pop-ups are good at capturing email addresses both on desktop and mobile devices.


✅ Easy-to-use

✅ Great templates

✅ Setting-up is fast


❌ Doesn’t have a spin-to-win wheel

❌ No free trial

❌ No monthly basis pricing option


Creating a list of addresses of visitors who want to receive your emails is as important as having a fixed deposit in life. 

Those customers have already visited your website, and your products interest them. So, even if they don’t purchase anything on their first visit, you have the chance to convert them in the future. 

All the best for the holiday sales! 

What’s a Rich Text element?

The rich text element allows you to create and format headings, paragraphs, blockquotes, images, and video all in one place instead of having to add and format them individually. Just double-click and easily create content.

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Static and dynamic content editing

A rich text element can be used with static or dynamic content. For static content, just drop it into any page and begin editing. For dynamic content, add a rich text field to any collection and then connect a rich text element to that field in the settings panel. Voila!

How to customize formatting for each rich text

Headings, paragraphs, blockquotes, figures, images, and figure captions can all be styled after a class is added to the rich text element using the "When inside of" nested selector system.

Author’s Details

Rajnish Das

Rajnish Das is an in-house writer at SmartWriter and SmartLead. She writes product-oriented, data-driven content for B2B SaaS audiences and educates them on marketing and sales topics. Her expertise includes outbound marketing techniques like cold emailing and LinkedIn outreach.


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Frequently asked questions

General Questions

What is Smartlead's cold email outreach software?

Email automation FAQs- Smartlead

Smartlead's cold email outreach tool helps businesses scale their outreach efforts seamlessly. With unlimited mailboxes, fully automated email warmup functionality, a multi-channel infrastructure, and a user-friendly unibox, it empowers users to manage their entire revenue cycle in one place. Whether you're looking to streamline cold email campaigns with automated email warmups, personalization fields, automated mailbox rotation, easy integrations, and spintax, improve productivity, or enhance scalability with subsequences based on lead’s intentions, automated replies, and full white-label experience, our cold email tool implifies it in a single solution.

How does the "unlimited mailboxes" feature benefit me?

Email automation FAQs- Smartlead

Our "unlimited mailboxes" feature allows you to expand your email communications without restrictions imposed by a mailbox limit. This means you won't be constrained by artificial caps on the number of mailboxes you can connect and use. This feature makes Smartlead the best cold email software and empowers you to reach a wider audience, engage with more potential customers, and manage diverse email campaigns effectively.

What do you mean by "unibox to handle your entire revenue cycle"?

Email automation FAQs- Smartlead

The "unibox" is one of the unique features of Smartlead cold email outreach tool, and it's a game-changer when it comes to managing your revenue cycle. The master inbox or the unibox consolidates all your outreach channels, responses, sales follow-ups, and conversions into one centralized, user-friendly mailbox.

With the "unibox," you gain the ability to:
1. Focus on closing deals: You can now say goodbye to the hassle of logging into multiple mailboxes to search for replies. The "unibox" streamlines your sales communication, allowing you to focus on what matters most—closing deals.

2. Centralized lead management: All your leads are managed from one central location, simplifying lead tracking and response management. This ensures you take advantage of every opportunity and efficiently engage with your prospects.

3. Maintain context: The "unibox" provides a 360-degree view of all your customer messages, allowing you to maintain context and deliver more personalized and effective responses.

How does Smartlead ensure my emails don't land in the spam folder?

Email automation FAQs- Smartlead

Smartlead, the best cold email marketing tool, ensures your emails reach the intended recipients' primary inbox rather than the spam folder. 

Here's how it works:
1. Our "unlimited warmups" feature is designed to build and maintain a healthy sending reputation for your cold email outreach. Instead of sending a large volume of emails all at once, which can trigger spam filters, we gradually ramp up your sending volume. This gradual approach, combined with positive email interactions, helps boost your email deliverability rates.

2. We deploy high-deliverability IP servers specific to each campaign. 

3. The ‘Warmup’ feature replicates humanized email sending patterns, spintax, and smart replies.
4. By establishing a positive sender reputation and gradually increasing the number of sent emails, Smartlead minimizes the risk of your emails being flagged as spam. This way, you can be confident that your messages will consistently land in the primary inbox, increasing the likelihood of engagement and successful communication with your recipients.

Can I integrate Smartlead with other tools I'm using?

Email automation FAQs- Smartlead

Certainly, Smartlead is designed for seamless integration with a wide range of tools and platforms. Smartlead offers integration with HubSpot, Salesforce, Pipedrive, Clay, Listkit, and more. You can leverage webhooks and APIs to integrate the tools you use. Try Now!

Email automation FAQs- Smartlead

What type of businesses sees the most success with Smartlead?

No, there are no limitations on the number of channels you can utilize with Smartlead. Our multi-channel infrastructure is designed to be limitless, allowing you to reach potential customers through multiple avenues without constraints.

This flexibility empowers you to diversify your cold email outreach efforts, connect with your audience through various communication channels, and increase your chances of conversion. Whether email, social media, SMS, or other communication methods, Smartlead's multi-channel capabilities ensure you can choose the channels that best align with your outreach strategy and business goals. This way, you can engage with your prospects effectively and maximize the impact of your email outreach.

Email automation FAQs- Smartlead

Do you provide me with lead sources?

Smartlead distinguishes itself from other cold email outreach software by focusing on limitless scalability and seamless integration. While many similar tools restrict your outreach capabilities, Smartlead offers a different approach.

Here's what makes us uniquely the best cold email software:

1. Unlimited Mailboxes: In contrast to platforms that limit mailbox usage, Smartlead provides unlimited mailboxes. This means you can expand your outreach without any arbitrary constraints.

2. Unique IP Servers: Smartlead offers unique IP servers for every campaign it sends out. 

3. Sender Reputation Protection: Smartlead protects your sender reputation by auto-moving emails from spam folders to the primary inbox. This tool uses unique identifiers to cloak all warmup emails from being recognized by automation parsers. 

4. Automated Warmup: Smartlead’s warmup functionality enhances your sender reputation and improves email deliverability by maintaining humanized email sending patterns and ramping up the sending volume. 

5. Multi-Channel Emphasis: Smartlead places a strong emphasis on multi-channel outreach. You can reach your prospects where they are with the LinkedIn outreach feature.   With Smartlead’s cold email automation software, you're always one step ahead in your outreach efforts, enjoying the freedom to scale your initiatives and seamlessly integrate with other tools—all while maintaining a focus on maximizing the impact of your outreach.

Email automation FAQs- Smartlead

How secure is my data with Smartlead?

Ensuring the security of your data is Smartlead's utmost priority. We implement robust encryption methods and stringent security measures to guarantee the continuous protection of your information. Your data's safety is paramount to us, and we are always dedicated to upholding the highest standards of security.

How can I get started with Smartlead?

Email automation FAQs- Smartlead

Getting started with Smartlead is straightforward! Just head over to our sign-up page and follow our easy step-by-step guide. If you ever have any questions or need assistance, our round-the-clock support team is ready to help, standing by to provide you with any assistance you may require. Sign Up Now!

How can I reach the Smartlead team?

Email automation FAQs- Smartlead

We're here to assist you! You can easily get in touch with our dedicated support team on chat. We strive to provide a response within 24 hours to address any inquiries or concerns you may have.

Powerful Automated Email Marketing that Drives Sales.

  • All Features Included
  • No Credit Card Required
  • Free Warmup Included