The risk in any email or SMS migration isn't the export. It's the sender reputation you rebuild from scratch if you rush it. We run migrations as a deliverability project first: authenticate, warm the IPs, port templates and flows, and cut over in phases so revenue never stops.
Migrations fail in predictable places. We guard all four, because losing any one of them means starting your sender reputation over.
A representative IP-warmup ramp. Real schedules flex to your volume and engagement, but the principle never changes: earn reputation before you spend it.
Send to your most engaged segment at low volume. Establish positive signal, watch bounces and complaints, and confirm authentication is clean.
Increase volume on schedule and expand to broader engaged segments, holding back if any deliverability metric dips below threshold.
Bring the majority of the list online while the old platform still runs in parallel, so you can compare placement and pull back if needed.
Switch all programs to the new platform, retire the old sender, and hand off a warmed, documented, fully-running system.
The migrations we run most. Don't see yours? The method is platform-agnostic: if it sends email or SMS, we can move it.
| From | To | What we protect most | |
|---|---|---|---|
| Klaviyo | → | Customer.io | Event model & flow logic |
| Braze | → | Customer.io | Identity & segmentation |
| Iterable | → | Customer.io | Templates & deliverability |
| Klaviyo | → | Attentive | SMS consent & list growth |
| Postscript | → | Attentive | Subscribers & carrier reg |
| Mailchimp | → | Customer.io | Domain reputation & auth |
Deeper, platform-specific plans with the exact data, consent, and cutover steps for where you're headed.
Book a Readiness Audit and we'll assess your deliverability, list, and flows, then hand you a warmup and cutover plan built to keep revenue running.
