--- title: How Sleep Reset migrated 21 automated journeys from Klaviyo to Customer.io — without dropping a single send description: Discover how Sleep Reset successfully migrated 21 automated journeys from Klaviyo to Customer.io, enhancing their engagement strategy without losing a single send. image: https://optiblack.com/hubfs/Optiblack%20Vishal%20Rewari%20Product%20Analytics%20(12)-2.png --- OPTIBLACK - [Services](https://optiblack.com/services) - [Customers](https://optiblack.com/customers) [Book a strategy call](https://optiblack.com/book-a-call) - [Services](https://optiblack.com/services) - [Customers](https://optiblack.com/customers) [Book a strategy call](https://optiblack.com/book-a-call) [Case Studies](https://optiblack.com/insights/tag/case-studies) [customerIO](https://optiblack.com/insights/tag/customerio) [Migration](https://optiblack.com/insights/tag/migration) May 24, 2026, 5:19:40 AM · 4 min read # How Sleep Reset migrated 21 automated journeys from Klaviyo to Customer.io — without dropping a single send ![Vishal Rewari](https://app.hubspot.com/settings/avatar/978df0061a7518a88e144c0b237262ab) Vishal Rewari Optiblack ![sleep reset, optiblack, customerio, klaviyo](https://optiblack.com/hubfs/Optiblack%20Vishal%20Rewari%20Product%20Analytics%20(12)-2.png)   ![Screenshot 2026-05-24 at 04.56.30](https://optiblack.com/hs-fs/hubfs/Screenshot%202026-05-24%20at%2004.56.30.png?width=685&height=208&name=Screenshot%202026-05-24%20at%2004.56.30.png)   --- ## The challenge: outgrowing a platform Sleep Reset is a digital sleep improvement platform serving tens of thousands of subscribers across the US. Over time, their engagement stack — built on Klaviyo — had evolved into a complex web of automated email journeys, A/B-tested campaigns, SMS broadcasts, and daily push notification sequences inherited from a prior Braze setup. As the product scaled, the team needed something more event-driven and API-first — a platform that could unify their multi-channel messaging under one roof. Customer.io was the answer. But migrating a live, revenue-critical system is never as simple as copying and pasting. Optiblack was brought in to plan and execute the full migration. > "Sleep Reset runs one of the more sophisticated consumer engagement programmes we've migrated — 65–70% open rates on broadcast emails, A/B-tested journeys with 10+ message variants, and a legacy push stack inherited from Braze. The challenge wasn't just moving assets; it was recreating complex audience filter logic in a fundamentally different data model."   ## Scope: three parallel tracks The migration was broken into three independent workstreams, each running in parallel to avoid cross-channel delays. ![Screenshot 2026-05-24 at 04.58.01](https://optiblack.com/hs-fs/hubfs/Screenshot%202026-05-24%20at%2004.58.01.png?width=691&height=188&name=Screenshot%202026-05-24%20at%2004.58.01.png)   Key journeys migrated included the free trial drop-off re-engagement flow (24 messages, A/B tested), subscription cancellation confirmation, post sign-up onboarding drip, renewal reminder sequences (3-day, 7-day, 14-day), a 7-day new user push sequence, daily morning and bedtime reminders, an abandoned cart SMS flow, and transactional emails such as magic login links. ## How time estimates went from 12 hours to 1 hour Initial scoping assumed a near 1:1 rebuild of each journey. After completing Stage 01, the team identified repeatable build patterns — and slashed per-journey time by 80–90% on simpler automations.   ![Screenshot 2026-05-24 at 04.58.39](https://optiblack.com/hs-fs/hubfs/Screenshot%202026-05-24%20at%2004.58.39.png?width=686&height=155&name=Screenshot%202026-05-24%20at%2004.58.39.png) Technical challenges — and how they were resolved - Challenge Klaviyo filters users by subscription end date using profile attributes — a method that doesn't translate directly to Customer.io's data model, requiring audience-based workarounds. Resolution Subscription expiry logic was rebuilt using Customer.io audience segments with event-based entry conditions. Behaviour was confirmed to match before any journey went live. - Challenge Email templates export cleanly from Klaviyo as HTML — but Customer.io doesn't support direct HTML template imports. This platform gap was discovered mid-migration. Resolution All HTML was exported and archived from Klaviyo and handed to the client for manual import at their convenience. Template hours were excluded from the migration timeline. - Challenge The trial drop-off journey contained 24 individual messages — significantly more than estimated — each requiring separate setup in Customer.io. Resolution After completing the first three messages, the team templated the structure and created a repeatable build pattern, cutting per-message time significantly for the remainder of the journey. ## The process that made it work   1\. Audit & inventory Full catalogue of existing journeys, campaigns, user lists, and segments. Every asset is tagged with channel, status, and complexity before a single line is rebuilt.   2\. Priority triage Assets sorted into Stage 01 (revenue-critical, live journeys) and Stage 02 (recurring, simpler automations). Deprecated assets flagged upfront — not migrated unnecessarily. 3\. Parallel build tracks Email, SMS, and push are handled as separate workstreams with independent timelines. No cross-channel dependency blocks a channel from going live. 4\. Logic translation Audience filters, segment criteria, and A/B structures are re-engineered for the target platform — not copy-pasted. Platform gaps flagged and resolved with the client before build. 5\. QA & event validation User events are verified live in Customer.io before journeys activate. All audience filters are tested against real user profiles before going live. 6\. Handoff & documentation Migration tracker delivered alongside the live workspace. Any asset requiring client action is flagged clearly, with pre-prepared assets ready to use. ## The result In approximately two weeks, Sleep Reset's full engagement stack was live in Customer.io — 21 automated journeys across email, push, and SMS, rebuilt without a missed send. The structured approach turned a project initially scoped at 200+ hours into a 54-hour execution, saving roughly 73% of the estimated effort. The migration also surfaced and resolved four significant technical issues before they could affect subscribers — including a workspace error that could have derailed weeks of work. [![Screenshot 2026-05-24 at 05.04.35](https://optiblack.com/hs-fs/hubfs/Screenshot%202026-05-24%20at%2005.04.35.png?width=688&height=188&name=Screenshot%202026-05-24%20at%2005.04.35.png)](https://optiblack.com/book-a-call) ![Vishal Rewari](https://app.hubspot.com/settings/avatar/978df0061a7518a88e144c0b237262ab) Vishal Rewari [#Case Studies](https://optiblack.com/insights/tag/case-studies) [#customerIO](https://optiblack.com/insights/tag/customerio) [#Migration](https://optiblack.com/insights/tag/migration) / Keep reading ## More from Optiblack [![From Zero to a Multi-Region Analytics Backbone: How OptiBlack Built Scrut's Entire Data Platform](https://optiblack.com/hubfs/Optiblack%20Vishal%20Rewari%20Product%20Analytics%20(12)-3.png) Case Studies From Zero to a Multi-Region Analytics Backbone: How OptiBlack Built Scrut's Entire Data Platform](https://optiblack.com/insights/from-zero-to-a-multi-region-analytics-backbone-how-optiblack-built-scruts-entire-data-platform) [![AI in Geographic Segmentation: Key Use Cases](https://optiblack.com/hubfs/Optiblack%20Vishal%20Rewari%20Product%20Analytics%20(11)-4.png) Information AI in Geographic Segmentation: Key Use Cases](https://optiblack.com/insights/ai-geographic-segmentation-key-use-cases) [![RealBooks Selects Optiblack as Strategic Analytics Partner to Build Modern Data Stack for Real Estate Investors](https://optiblack.com/hubfs/Optiblack%20Vishal%20Rewari%20Product%20Analytics%20(11)-3.png) News RealBooks Selects Optiblack as Strategic Analytics Partner to Build Modern Data Stack for Real Estate Investors](https://optiblack.com/insights/realbooks-selects-optiblack-as-strategic-analytics-partner-to-build-modern-data-stack-for-real-estate-investors) / 15-minute exploration call ## Turn these insights into revenue. We'll go through your CRM, product, and analytics data together and show you exactly where growth is leaking. No setup. No dashboards. Just signal. [Book a strategy call →](https://optiblack.com/book-a-call) [OPTIBLACK](https://optiblack.com/) US: 1309 Coffeen Ave, Suite 1200, Sheridan, WY 82801 · +1 682 297 2970 — India: 297 Designs, 74 SBK Society, Paldi, Ahmedabad 380007 · +91 9819394297 Services [Data services](https://optiblack.com/services) [CRM services](https://optiblack.com/services) [AI services](https://optiblack.com/services) [Book a call](https://optiblack.com/services) Company [Customers](https://optiblack.com/customers) [About Us](https://optiblack.com/about-us) [Insights](https://optiblack.com/insights) © 2026 Optiblack · 2× Mixpanel Partner of the Year · vishal@optiblack.com ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Vishal Rewari", "url" : "https://optiblack.com/insights/author/vishal-rewari" }, "dateModified" : "2026-06-11T09:26:01.084Z", "datePublished" : "2026-05-23T23:49:40.000Z", "headline" : "How Sleep Reset migrated 21 automated journeys from Klaviyo to Customer.io — without dropping a single send", "image" : [ "https://optiblack.com/hubfs/Optiblack%20Vishal%20Rewari%20Product%20Analytics%20(12)-2.png" ], "mainEntityOfPage" : { "@id" : "https://optiblack.com/insights/sleep-reset-migrated-from-klaviyo-to-customerio", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://optiblack.com/hubfs/Group%201234.png" }, "name" : "Optiblack" } } ```