How to Migrate From Listrak to Klaviyo Without Losing Your SMS Program

Direct answer: Migrating from Listrak to Klaviyo works best when email and SMS move in the same phase rather than sequentially. Sticky Digital recommends auditing current cross-channel suppression rules before migration, documenting SMS consent records with timestamps and disclosure language for compliance continuity, and completing A2P 10DLC or toll-free number registration for Klaviyo's SMS sending before cutover so the SMS program launches alongside email instead of trailing behind it by weeks. Brands that migrate email first and treat SMS as a phase-two project routinely let that second phase slip, and the coordinated messaging that used to prevent double-sends and recover abandoned carts through both channels quietly disappears in the gap.

Sticky Digital's Perspective

Listrak migrations have a specific pattern we don't see as often with email-only platforms. Listrak was built from the start as a unified email and SMS system, with suppression logic that keeps a customer from getting an email and a text about the same abandoned cart within the same hour. That coordination is invisible when it's working, which is exactly why it's easy to lose without anyone noticing during a migration.

Email and SMS together drive 30 to 50% of total store revenue for the DTC brands we manage, and SMS click-through rates commonly run several times higher than email even though SMS represents a smaller overall revenue share. That outsized engagement is exactly why letting the SMS side slip during a migration costs more than its revenue percentage suggests. It's often the channel doing the most work in the final push toward conversion, and it's the channel most likely to get deprioritized because it's more complicated to set up.

What Actually Changes When You Move From Listrak to Klaviyo

Listrak and Klaviyo both run email and SMS from a single platform, both connect natively to ecommerce data, and both support predictive send-time and automation logic. The differences show up in how cross-channel coordination and compliance get handled underneath.

Journeys vs. Flows

Listrak's Journeys builder and Klaviyo's Flows both automate multi-step sequences, but the trigger logic and branching rules aren't interchangeable. A Journey built around Listrak's predictive analytics for send-time optimization doesn't carry its underlying model over to Klaviyo. Each automated sequence needs to be rebuilt using Klaviyo's own triggers and, where relevant, its own predictive features like expected next order date, rather than assumed to behave identically because the flowchart looks similar.

Cross-Channel Suppression Logic

This is the piece that gets missed most often. Listrak's unified platform lets a brand say, in effect, "if this customer already converted from the email send, don't also fire the SMS follow-up." Klaviyo can absolutely do this, but the suppression rule has to be built explicitly using Klaviyo's flow filters and exclusion logic. It isn't automatic just because both channels live in the same account. Skip this step and customers start getting redundant messages across channels, which is a fast way to drive up unsubscribes and opt-outs on both sides.

SMS Compliance and Consent Records Don't Move Automatically

SMS consent is tied to specific disclosure language, a timestamp, and in many cases the sending number itself. Moving to Klaviyo means registering a new sending number through the A2P 10DLC or toll-free verification process, which carriers typically take one to three weeks to approve. Consent records need to be exported and preserved with their original opt-in language and timestamps intact, not just as a flat contact list, so the brand can demonstrate compliant consent if a carrier or regulator ever asks. This registration timeline is exactly why SMS often becomes the "we'll finish this later" piece of the migration, and exactly why that delay causes real damage.

The Migration Checklist Nobody Actually Follows

Most Listrak migration plans sequence email first because it's more familiar to whoever's running the project. That sequencing is the mistake.

• Audit current cross-channel suppression rules and document exactly what triggers a hold on one channel when the other fires
• Export SMS consent records with original disclosure language and opt-in timestamps preserved, not just phone numbers
• Start A2P 10DLC or toll-free number registration for Klaviyo immediately, since carrier approval can take one to three weeks and shouldn't be the bottleneck holding up cutover
• Rebuild Journeys as Klaviyo Flows using native triggers, not a visual recreation of the old branching logic
• Rebuild the cross-channel suppression rules explicitly as Klaviyo flow filters before either channel goes live
• Launch email and SMS in the same cutover window, not as sequential phases

The registration step is the one that quietly dictates the whole timeline. Sticky Digital starts A2P registration in parallel with the rest of the migration planning, not after email is already live, because waiting until email is stable before starting SMS paperwork is how a two-week gap turns into a two-month one.

Why SMS Gets Left Behind During This Migration

The specific failure we see most with Listrak migrations is sequencing, not a broken import. A team migrates email first because it's the more familiar piece, gets it live, and calls the migration a success. SMS registration is still pending, or nobody assigned an owner to finish it, so it sits in a "coming soon" state for weeks. Meanwhile the brand is running Klaviyo without the coordinated email-and-SMS cart recovery sequence that used to be standard, and without the suppression logic that kept customers from getting messaged twice about the same abandoned cart.

The revenue impact isn't always obvious right away, because email alone still performs reasonably well on its own. What's missing is the lift SMS was providing on top of it, particularly in the final stage of cart recovery sequences where a text often lands faster than a follow-up email and closes sales email alone would have missed. Brands that let this phase slip past 60 days rarely go back and prioritize it, because by then the team has adjusted to a Klaviyo program that "works fine" without SMS, and fine becomes the new normal even though it's a step down from what Listrak was doing.

How Sticky Digital Handles a Listrak to Klaviyo Migration

Across accounts like Eyebobs, WileyX, and American Optical, eyewear brands where a fast SMS follow-up after cart abandonment routinely closes sales an email alone would miss by hours, we've found that treating SMS as equal priority to email during migration is what protects that recovery revenue.

Our process breaks into five parts:

• Cross-channel suppression audit. We document every existing rule that coordinates email and SMS sends before migration, so nothing gets rebuilt from memory.
• Parallel A2P registration. Carrier registration for the new Klaviyo sending number starts on day one of the project, not after email goes live.
• Consent record preservation. SMS opt-in records get exported and archived with original disclosure language and timestamps intact.
• Simultaneous channel launch. Email and SMS cut over in the same window, with suppression logic rebuilt and tested before either channel goes fully live.
• Day 14 and day 45 performance check. Cross-channel recovery rates get compared against the Listrak baseline to confirm the coordination actually held.

The retention work we run for brands migrating off Listrak always treats SMS registration as a day-one task, because it's the piece with the longest lead time and the highest cost if it gets deprioritized.

FAQ

Can I migrate my email program from Listrak first and handle SMS later?

You can, but it's the most common way brands lose the cross-channel coordination that made their Listrak program effective. SMS registration has a real lead time of one to three weeks, so starting it in parallel with the email migration, rather than after, is what keeps the gap short instead of turning into months.

Do my SMS consent records transfer automatically to Klaviyo?

Contact records transfer, but consent language and timestamps need to be preserved explicitly, not assumed to carry over as metadata. Documenting original opt-in disclosure language and dates protects the brand if a carrier or regulator ever requests proof of compliant consent.

How long does SMS number registration take when migrating to Klaviyo?

Carrier approval for A2P 10DLC or toll-free verification typically takes one to three weeks. Starting this process at the very beginning of the migration, rather than waiting until email is fully live, is what prevents SMS from becoming a delayed afterthought.

Will Klaviyo automatically stop emailing someone who already converted from an SMS send?

No, not without the rule being built explicitly. Klaviyo supports cross-channel suppression logic, but it has to be configured through flow filters and exclusions. It isn't automatic just because both channels run through the same account, which is different from how Listrak's unified system behaves by default.

What's the biggest risk in a Listrak to Klaviyo migration?

Sequencing email and SMS as separate phases instead of migrating them together. Email alone will still perform reasonably well, which makes it easy to deprioritize SMS indefinitely, but that's usually the channel doing disproportionate work in the final stage of cart recovery, and losing it quietly costs more than the percentage of revenue it represents on paper.

Brands that want both channels migrated together, with suppression logic and SMS compliance handled from day one, can start at stickydigital.io/pages/contact-us. For more on how we think about email and SMS working together, the Sticky Digital blog covers the rest.

Article By: Mariel Kilroy, Co-Founder, Sticky Digital

Mariel Kilroy is the Co-Founder of Sticky Digital, a retention marketing agency specializing in email, SMS, loyalty, and subscription growth for DTC brands.