Conversion Rate Optimization

How to Grow Your SMS Subscriber List (without Sacrificing Email List Growth)

March 30, 2022
Melanie Angel

Marketers have tough choices about which initiatives to prioritize. Fortunately, choosing between more SMS subscribers and more email subscribers doesn't have to be one of them.

SMS marketing’s had a moment recently, and according to SMS Comparison, it shows no signs of letting up in 2022. After all, it’s hard to pass up the benefits of text marketing. SMS has a click-through rate (CTR) of 19%, 4.75x more than email and 19x more than Facebook ads.

Unfortunately, while many brands have mature email programs with email lists in the thousands (or millions), their SMS list growth lags behind.

Email vs. SMS List Growth: A Balancing Act?

Brands often grow their email lists by capturing emails on their website, usually with pop-ups or embedded forms.

email capture form featuring a picture of a very good dog
This is a very good dog. And the capture form isn't bad either.

Email pop-ups like this are great for capturing more emails, but some marketers struggle with the best way to replicate their email capture success with SMS list growth.

“Do I replace the email pop-up on my site with an SMS pop-up and lose out on email subscribers? Or do I add a mobile number field to my existing email forms? What if visitors don’t want to submit both pieces of information, so we get neither of them?”

capture form with fields for email and mobile number
Still a very good dog, but the capture form presents a problem. If visitors don't want to submit both their email and mobile number, then you won't capture either piece of information.

SMS subscribers are extremely valuable, but you don’t have to sacrifice email signups for mobile number opt-ins. In fact, you can even use your existing email list to grow your text message marketing audience.

2 Ways to Incorporate SMS Subscriber Growth into Your Email Strategy

Here are two approaches you can take to grow your mobile list alongside your email list.

1) Collect text messaging opt-ins with multi-step forms.

The more fields your web form has, the less likely visitors are to complete the form. But with a multi-step form, you can capture more data without scaring subscribers off with long forms.

Multi-step forms consist of two or more pages, allowing visitors to provide form data piece by piece. Breaking long forms into smaller pieces creates a less daunting user experience, making it more likely that users will complete each step.

Plus, multi-step forms can capture data progressively. That way, even if users abandon a form without completing each step, you still get the data they provided in previous steps.

To grow your SMS list without losing email signups, you can collect the email address on step one, then ask for the visitor’s mobile number on the second page. Here's the email pop-up example from earlier, changed to a multi-step form.

two-step form with email capture and sms subscriber capture
The best dog, and the best way to capture emails and mobile numbers with a single form.

If a visitor submits the first step of this form but abandons the second step, you at least have their email address.

Now that you’ve got the user’s email address, you’ve got options for converting them into text message subscribers. On their next visit, you can show the second page of your pop-up and invite them to sign up for SMS updates, or you can take the invitation straight to their inbox.

2) Use your email list to grow your text marketing subscriber list. 

The multi-step form is a great way to guide new email subscribers to your SMS list, but what about your existing email subscribers?

Say you currently have an email list of 10,000 subscribers. Instead of waiting for each subscriber to visit your site and opt into text messages, why not message them with an invitation to your SMS list?

But before you go this route, put yourself in the email subscriber’s shoes. These people already receive emails; why should they sign up for more messages from you? Think about the added value that subscribers may get from text messages, such as:

  • Exclusive promotions not available to email subscribers
  • Early access to new products
  • Up-to-the-minute shipping updates
  • Discount coupons that can be scanned in-store

Then, build an email campaign that conveys this value.

To collect the opt-in through this campaign, you can ask subscribers to text the opt-in keyword to your shortcode, or you can direct them to a URL where they can provide their number.

How to Create Pop-Up Forms and Landing Pages that Grow Your Subscriber List

Whether you target website visitors or email subscribers with your SMS list growth campaigns, you’ll need pop-up forms or landing pages designed to convert them into text subscribers.

Here, we’ll cover how to create multi-step forms and landing pages with Digioh. If you don’t use Digioh’s form builder, your process may look a bit different. However, assuming your solutions offer the same features, you can still use these tactics to build high-converting forms that kick your text marketing list growth into high gear.

Creating Multi-Step Pop-Ups to Collect Emails and Mobile Numbers

Embedded forms are perfectly fine for collecting data. However, a well-timed pop-up modal can capture your site visitors’ attention, making it more likely that you’ll capture their information too.

Digioh provides many SMS opt-in form templates designed to capture email addresses and mobile numbers progressively. These two-step forms can be displayed in lightboxes that appear centered in the browser window, sidebar widgets that slide out from the edge of the screen, or banners that stick to the top or bottom of your site.

pop-up form templates available in the digioh platform
Digioh's theme library offers hundreds of prebuilt templates, including templates designed to convert SMS subscribers.

After choosing your template, you can customize the fonts, images, colors, and even CSS to match your site’s branding.

Write a clear, concise CTA that shows your site visitors what they can expect to receive in return for providing their email address. Next, do the same for the second page of your pop-up. Create a message that invites your new email subscribers to opt into text updates as well.

As you build your forms, make sure you set up your form integrations to pass data to the right place. If you send emails and text messages from separate platforms, you'll need to send new subscribers to each platform. Digioh integrates with many email marketing and text message marketing platforms, allowing you to connect with new subscribers right away.

Increasing Conversions with Targeted Pop-Up Forms

Then, set up the conditions that will trigger your pop-up to appear on your site. Depending on your form builder, these might include:

  • URL: Will you show your pop-up on every page, or just specific product pages? Should you exclude certain URLs, such as your customer support or privacy policy pages?
  • Referral Source: If a visitor arrives on site via email, exclude these visitors from seeing a pop-up asking them to sign up for those same emails. You can also show different pop-ups to users who visit from a Facebook post or Google Search ad.
  • Time on Page/Scroll Depth: Triggering a pop-up as soon as your page loads may discourage new visitors from signing up. By delaying a pop-up for several seconds or until visitors scroll down your page, you may give them a chance to see whether they’re interested in your products (and your messaging).
  • Returning/Logged-In Visitors: While you may try more aggressive tactics to convert new visitors into subscribers, suppressing pop-ups will give repeat customers and logged-in visitors a better user experience.
  • Exit-Intent: Pop-ups triggered by exit-intent will appear when a visitor moves their cursor out of the browser window. Pairing a capture pop-up with a discount code may exiting convince visitors to stick around a little bit longer.

Try combining different display conditions to provide the best experience for your visitors.

One-Tap Subscriber Opt-In Pop-Ups for Mobile

Speaking of better user experiences, the best way to improve SMS list growth is to make the opt-in process as seamless as possible

If users visit your site from a mobile device, you can replace the mobile number form field with a one-tap button that makes it easier to opt into SMS marketing.

With Digioh, you can create a button that populates an opt-in text message on mobile devices. By submitting the prepopulated text message to your shortcode, they opt into your SMS marketing communication automatically.

one-tap sms opt-in path
When clicked, this one-tap opt-in button populates a text in the user's native text messaging app. After the user hits send, they are opted into text marketing messages.

One-tap opt-ins prevent typos and reduce friction in the signup process. This, along with other mobile-friendly pop-up tweaks, can help you improve mobile conversion rates.

Creating Landing Pages that Capture Mobile Numbers

If you invite your email subscribers to opt into text message updates, you’ll need a way to collect their mobile numbers.

Sure, you could ask them to visit your site, wait for your pop-up to appear, and type their number in there. But, again, it’s important to make the opt-in process as easy as possible.

A better approach is to create a dedicated landing page for new SMS opt-ins. With a focused, mobile-friendly landing page, you increase the likelihood of converting email subscribers into text marketing subscribers.

Digioh’s drag-and-drop landing page solution also provides opt-in landing page templates, like the one below.

landing page template for collecting sms signups
This landing page template includes the necessary SMS compliance terms, allowing visitors to provide their mobile number in exchange for receiving offers via text.

Using email merge tags in the URL, Digioh landing pages can associate the user's email address with the mobile number entered in the form, making it easy to consolidate user data.

Once launched, you can promote your landing page in an email marketing campaign, then sit back as email subscribers become SMS subscribers too.

Grow Your Email List. Grow Your SMS Subscribers. Grow Your Business.

When time and resources are limited, marketers must make some tough choices about which initiatives to prioritize. Fortunately, choosing between SMS and email list growth isn’t one of them.

With multi-step forms and landing page email campaigns, you can have your marketing cake and, well, text it too.

Looking for more ways to grow your lists and collect zero-party data from your subscribers? Check out our list of ideas for adding quiz funnels to your marketing strategy.

Melanie Angel
Marketing Manager
Melanie is a marketing manager at Digioh. When she's not doing the B2B SaaS marketing thing, you can probably find her watching soccer, playing skeeball, or seeing a show. She lives in Austin, TX, with her 0 pets and 1 guitar.

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