SMS Marketing
Growing Your Text List From Your Email Subscriber List
Boosting your SMS marketing is easier than you think - just convert your email subscribers into text message contacts with some smart strategies!
SMS List Growth
Turn email subscribers into text subscribers
Your email list is your best source of SMS subscribers. These are people who already opted in to hear from you, already trust your brand, and already want to stay connected. The challenge is getting them to opt in again — this time for SMS — without adding friction or making it feel like extra work.
Most brands send an email asking subscribers to "sign up for texts" with a link to a form. The subscriber clicks, lands on a page, fills out another form with their phone number, and submits. The conversion rate is low because it feels redundant — they already signed up once. Click-to-join links solve this by making the SMS opt-in a one-tap action inside the email they're already reading.
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How most brands convert email subscribers to SMS
The typical flow: brand sends an email to their list with a message like "Want to hear from us via text? Sign up here" and a link to a sign-up page. The email subscriber clicks the link, waits for a page to load, sees a form asking for their phone number (and sometimes other details they've already provided), types it in, and submits. If everything works, they receive a confirmation text and they're on the SMS list.
Even when the offer is compelling — exclusive text-only deals, early access, faster customer service — the multi-step process creates unnecessary friction. The subscriber is already engaged (they opened the email), but asking them to click through, load a page, and fill out a form turns a motivated lead into a multi-step task. Most don't bother.
For brands on Klaviyo or other email platforms with SMS features, the process is similar: an email promotes SMS sign-up, but conversion still depends on the subscriber completing a form. Email open rates are already low — adding form abandonment on top of that means only a small fraction of your email list ever makes it to SMS.
Email-to-SMS conversion with click-to-join links
With a click-to-join link embedded in your email, the conversion from email subscriber to SMS subscriber becomes a single tap. The email includes a clear call-to-action — "Get exclusive drops and deals over text — tap here to join" — with a click-to-join link. When the subscriber taps it, their native text messaging app opens with a pre-written opt-in message already composed. They hit send, and they're subscribed to SMS. No form, no typing, no page load.
This works in any email: welcome emails for new subscribers, weekly newsletters, promotional campaigns, transactional emails (order confirmations, shipping notifications), or dedicated SMS list-building campaigns. The subscriber stays inside their email app, taps once, switches to their messaging app for one second, and they're done.
For brands using Klaviyo with AudienceTap's bidirectional sync, this gets even more powerful. Phone numbers captured through click-to-join links in email automatically sync back to Klaviyo, so your email platform and SMS platform stay aligned. You can segment based on who's on both lists, who's email-only, and who's SMS-only — and target accordingly.
Side-by-side comparison
| Aspect | Traditional | With AudienceTap |
|---|---|---|
| Subscriber action | Click link → load page → fill form → type phone number → submit | Tap link → hit send on pre-written text |
| Typing required | Yes — subscriber types phone number | No — message is pre-written, phone number detected automatically |
| Form fields | Phone number, sometimes name or other info | None — happens inside messaging app |
| Load time | Depends on landing page speed | Instant — opens native messaging app |
| Where it works | Requires a separate landing page | Works in any email — newsletters, welcome emails, transactional emails |
| Klaviyo sync | Manual or delayed sync | Bidirectional — phone numbers sync automatically |
Where to use it
Click-to-join links work in any email format. Use them strategically to turn email engagement into SMS subscribers across your email program.
Welcome Emails
Add a click-to-join link to your email welcome series. New email subscribers can opt into SMS with one tap while they're already engaged.
Weekly Newsletters
Include a persistent CTA in your email newsletter: "Get exclusive drops over text — tap to join." Repeat it in every send to capture subscribers over time.
Promotional Campaigns
When promoting a flash sale or product drop, include a click-to-join link for text-only deals. "Want early access? Join our text list."
Transactional Emails
Add a click-to-join link to order confirmations and shipping notifications. "Get reorder reminders and exclusive deals — tap to join our text list."
Email Signatures
Include a click-to-join link in your team's email signatures. Every customer service email or outbound message becomes a sign-up opportunity.
Dedicated SMS List-Building Campaigns
Send a one-off email specifically promoting your SMS list with a compelling offer. Click-to-join makes the conversion frictionless.
Features that make it work
Text-to-Buy
Customers buy by replying to a text
No links, no carts, no checkout pages. The conversation is the checkout. See how brands sell out drops in minutes.
$18M+in text-driven sales
for merchants
for merchants
Weekly Coffee Drop
List Growth Tools
Keyword opt-in, QR codes, signup forms, and checkout capture in one platform.
Learn moreCampaigns & Segmentation
Target the right customers with the right products at the right time.
Learn moreAutomations & Flows
Build automated text flows triggered by purchase behavior and timing.
Learn moreGrowing Your SMS List from Email Subscribers FAQ
AudienceTap offers bidirectional sync with Klaviyo. Phone numbers captured through AudienceTap (via click-to-join links, keywords, or other methods) sync to Klaviyo as subscriber data. Conversely, phone numbers collected through Klaviyo forms flow into AudienceTap. This keeps both platforms aligned and lets you segment based on email + SMS status.
Be clear about the value. Instead of "Sign up for texts," say "Get exclusive drops and flash sales over text" or "Join our text list for early access to new releases." The key is making SMS feel like an upgrade or exclusive channel, not just another marketing message.
Yes. Offer a discount, early access to a drop, or a text-only deal as an incentive. "Tap to join our text list and get 15% off your next order" converts well because there's an immediate payoff.
Not if you position SMS as complementary, not competitive. Frame SMS as the channel for time-sensitive offers (drops, flash sales, restock alerts) while email remains the channel for longer-form content, storytelling, and education. Many customers want both.
It varies based on your audience, offer, and frequency of promotion. Brands that promote click-to-join links consistently in emails (welcome series, newsletters, transactional emails) can convert 10-30% of their engaged email subscribers to SMS over time.
Who this is for?
Any brand with an existing email list that wants to build an SMS channel. Especially powerful for brands on Klaviyo who can use AudienceTap's bidirectional sync to keep both platforms aligned.
DTC ecommerce brandsBrands with large email listsKlaviyo usersBrands investing in SMS marketingBrands with strong email engagement
Related reading
Related use cases
Click-to-Join Links for Social Media & Digital Marketing
One-tap SMS sign-up links for social, email, and ads — no forms, no typing.
SMS Welcome Series That Drives a First Purchase
Convert new subscribers into first-time buyers with a welcome flow that closes the sale inside the text.
Website Pop-Ups for SMS Capture
Convert website visitors into text subscribers with pop-ups that lead to exclusive drops and flash sales.
Related glossary terms
SMS Opt-In / Opt-Out
SMS Opt-In is how consumers give permission to receive business texts. Opt-Out is how they revoke it — typically by replying STOP. Both are required under TCPA regulations.
SMS Keyword Campaigns
SMS Keyword Campaigns use a specific word (e.g., "COFFEE" or "JOIN") that customers text to a phone number or short code to opt in, trigger an automation, or access a promotion.
SMS Welcome Series
An SMS Welcome Series is an automated sequence of text messages sent to new subscribers immediately after opt-in, designed to introduce the brand, set expectations, and drive a first purchase.
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