Klaviyo Email & SMS Agency for Shopify Brands
Klaviyo email and SMS programs built around flows, segmentation and lifecycle data, so more first-time buyers come back for a second order.
Selected Partners
What's included
Full-service Klaviyo email and SMS
Everything below is part of our retainer, built for your account and not copied from a template.
Flows
Every flow is built around where a customer is in their lifecycle, from first signup through second order and beyond. That includes replenishment timed to your actual reorder window, cross-sells based on what someone bought, and winback before customers lapse, with existing flows audited and rebuilt where they fall short.
Campaigns
A calendar planned around your launches, promotions and inventory, with each send targeted by engagement and purchase history. Copy and design are included in every send.
SMS
Planned on the same calendar as email, so each channel carries the messages it’s best suited for and subscribers don’t get the same thing twice. How much SMS you send depends on your list and your customers, not a fixed quota.
Segmentation and data
We connect the data Klaviyo needs to segment well, like subscription status, loyalty tiers and custom events, and build segments on how your customers actually buy. Existing setups get reviewed and extended rather than rebuilt for the sake of it.
Deliverability
Authentication set up and verified, sending practices that protect inbox placement, and ongoing monitoring so problems are caught before they show up in revenue.
Migrations
Moving from Attentive, Braze, Salesforce Marketing Cloud, Listrak or any other platform? We cover it. We rebuild your flows in Klaviyo, connect your integrations and import your full subscriber history, then test everything before cutover so nothing breaks the day you switch.
How it works
How a retention program starts
Every account starts from a different place. The process stays the same.
Discover
We learn your business first: your customers, margins, product cycle and what you need retention to do for growth.
Audit and plan
A full review of your Klaviyo account, data and deliverability, turned into a prioritized roadmap. You see what we’ll fix first and why.
Build and launch
We work through the roadmap in order of impact, whether that’s fixing what exists, building what’s missing or adding channels like SMS.
Run and report
Campaigns, testing and optimization month to month, with reporting that separates incremental revenue from what Klaviyo attributes.
Retention results
How Promix Turned Retention Into a Multi-Million Dollar Growth Engine
How Shinola Grew Klaviyo Revenue 27% During BFCM
Refined by Design: How Pura Cashmere Grew Email Revenue by 28%
How Bleacher Report Drove $4M in Revenue Through Email, SMS & Advertising
Baking Email and Paid Advertising Growth into Levain Bakery
Your team
Who runs your program
One senior team that runs strategy, creative and data together, so nothing gets lost between handoffs.
- Four specialists dedicated to your account
- One operating rhythm around all of it
Retention Lead
Owns your strategy, roadmap and results, and runs your syncs.
Copywriter
Writes every flow, campaign and SMS in your brand's voice.
Email Designer
Designs emails and signup forms built to convert on mobile.
Data & Deliverability Analyst
Handles segments, tracking, integrations and inbox placement.
Retention Lead
Owns your strategy, roadmap and results, and runs your syncs.
Copywriter
Writes every flow, campaign and SMS in your brand's voice.
Email Designer
Designs emails and signup forms built to convert on mobile.
Data & Deliverability Analyst
Handles segments, tracking, integrations and inbox placement.
What clients say
"Extremely responsive and proactive. They actively make suggestions to improve performance, not just execute."
Albert MathenyCEO, Promix Nutrition
"Zettler Digital transformed our email program into one of our most reliable revenue channels."
Carlisle KnightCOO & Co-Founder, Pura Cashmere
"Wonderful to work with. Dependable, timely, and like an extension of our team. A scrappy, responsive partner with deep knowledge as our brand keeps growing."
Kristina TothDirector of Ecommerce, Levain Bakery
"The Zettler Digital team goes above and beyond. I could not recommend their company enough! They are reliable and always available. They provide support, key insights, ideas, direction, and are super organized and mindful of deadlines."
Carolina ZapataEcommerce, Marchesa
"Zettler Digital doesn't feel like an agency but more like a business partner."
Zack BuckeyeCo-Founder, Buckeye Brownies
Klaviyo agency FAQ
Most retention programs start around $5,500 a month, but every engagement is scoped once we understand your business and what you need from retention: which channels we run across email, SMS and direct mail, how many campaigns go out each month, how many flows need rebuilding, and how much segmentation and integration work your data needs. You get one fixed monthly number before anything starts. Migrations are scoped separately as one-time projects.
We most often work on six- or twelve-month agreements. A retention program takes a few months to show its full value, since the first stretch goes into fixing flows, setting up tracking and getting the calendar running.
Our retainers are built for brands doing roughly $1M or more online that want email and SMS run as a real channel, not just a few campaign sends a month. If you’re earlier than that, or only need paid acquisition, a retainer probably isn’t the right fit. For brands that need a specific piece done, like an account audit, a migration to Klaviyo or a set of core flows built, we take that on as a one-time project.
Yes. Every email, SMS and signup form is written and designed by our own team, not outsourced. A dedicated copywriter learns your brand’s voice, and our designers build for how people actually read email, which is mostly on their phones. Strategy, copy, design, build and QA are all included in the retainer, and you review and approve everything before it sends.
Most often we run the full program, but we can be flexible depending on what your team already covers. Some brands bring us in for flows only, or campaigns only. Others keep design in-house and have us handle strategy, implementation and reporting. Whatever the split, we work like part of your team: a shared Slack channel, regular syncs and a live roadmap, so everyone knows who owns what.
Yes, we can migrate your email and SMS marketing to Klaviyo from any other platform, including Attentive, Postscript, Omnisend, Mailchimp, Listrak, Braze, Salesforce Marketing Cloud, Iterable, Bluecore, Cordial, Sailthru, HubSpot and ActiveCampaign. Every migration includes flows, data and tracking rebuilt and tested before cutover.
Klaviyo counts any order placed after an email touch. We report that number next to incremental revenue so you can see the difference.
Given our deep expertise and other services offered on Shopify, many of our ecommerce customers operate on Shopify. However, we actively work with brands on other commerce platforms such as WooCommerce, Magento (Adobe Commerce), BigCommerce, Salesforce Commerce Cloud, Miva, Wix and Squarespace, as well as non-ecommerce platforms with custom Klaviyo integrations.
Fixes to broken flows, tracking and signup forms start getting applied within days of signing and the impact is seen throughout a first month, since they run on traffic you already have. Gains from the rebuilt program, like stronger flows, SMS and a segmented calendar, build over the first quarter. Repeat purchase rate and lifetime value take longer, because they follow how often your customers naturally buy again. We report incremental revenue alongside Klaviyo’s attributed numbers, so you can see what the program is actually adding.
Tell us what you're building
We'll tell you what it takes. If we're the right partner, you'll know within thirty minutes.