Klaviyo Agency for Shopify: When to Hire One, What It Costs and Realistic Results

Klaviyo is easy to install and hard to run well. Most Shopify brands connect it, turn on a template abandoned cart flow, send a discount blast now and then, and assume email is handled. Then they look at what better-run stores get from the same tool and wonder what they're missing.

A Klaviyo agency for Shopify builds, tests and runs your email and SMS program: the automated flows, the campaign calendar, list health and reporting. Most Shopify brands are ready for one once they have steady orders, a growing list and flows nobody owns. Agency fees range from about $200 to nearly $10,000 a month, plus Klaviyo's own plan.

This guide covers when a Shopify brand should hire a Klaviyo agency for email and SMS, which flows and campaigns it should run, what it typically costs, and what results are realistic as a share of revenue.

When should a Shopify brand hire a Klaviyo agency?

Hire a Klaviyo agency when email and SMS should be earning real money and nobody owns them. In practice that's when you have steady order volume, a list that's growing every week, and flows that are either missing, untouched since setup, or built from templates nobody has tested. Before that point, a founder can set up the basics alone.

Signs you're ready:

• You're past Klaviyo's free plan, which covers up to 250 active profiles and 500 email sends a month (Klaviyo pricing).
• Paid ads are bringing in first orders, but repeat purchase rate is flat.
• Campaigns go out when someone remembers, not on a calendar.
• You can't say what share of revenue email and SMS drive, or whether it's growing.
• You're about to add SMS and don't want to get consent wrong. Klaviyo's own guide is blunt: "Individuals must explicitly agree to receive SMS messages" (Klaviyo SMS consent guide).

If you're weighing an agency against a hire, in-house marketing vs an agency walks through the tradeoffs.

What flows should a Klaviyo agency build first?

Flows first, campaigns second. Flows are automated messages triggered by what a customer does, and they carry far more revenue per send than campaigns. Klaviyo's 2026 benchmarks, based on more than 183,000 customers, show email flows drive nearly 41% of email revenue from just 5.3% of sends (Klaviyo email benchmarks). For SMS the gap is similar: flows are 7.6% of sends and 45.2% of SMS revenue (Klaviyo SMS benchmarks).

The core set every Shopify brand should have, with Klaviyo's own setup guides:

Flow	Trigger	Job it does
Welcome series	New subscriber	Turns sign-ups into first orders
Abandoned cart	Started checkout, didn't buy	Recovers sales already in motion
Browse abandonment	Viewed a product, didn't add to cart	Brings back high-intent browsers
Post-purchase	Placed an order	Sets up the second order, reviews, education
Replenishment	Time since last order of a consumable	Times the reorder for products that run out
Winback	No order in a set period	Reactivates lapsed customers
Sunset	Long-term non-engagement	Cleans the list to protect deliverability

On Shopify, the agency should also check the integration itself before building anything: that customers, orders, the product catalog and checkout events are syncing into Klaviyo, and that email and SMS consent collected at Shopify checkout is reaching Klaviyo. A flow can't fire on an event that never arrives.

A good agency won't stop at building these. It'll split them by new versus returning customers, test subject lines and offers, and add SMS steps where they earn their cost.

What campaigns should a Klaviyo agency run?

A planned calendar, not discount blasts. Expect product launches, restocks, education and founder-story content, seasonal moments, and segmented sends that treat engaged subscribers differently from people who haven't opened in months. Most of the skill is segmentation and frequency: send more to people who buy, less to people who don't, and keep the list clean.

Deliverability is part of the job. Google's sender guidelines require bulk senders (close to 5,000 or more messages a day to personal Gmail accounts) to authenticate with SPF, DKIM and DMARC, offer one-click unsubscribe on marketing messages and keep reported spam rates below 0.3% (Google email sender guidelines). An agency that doesn't check your authentication and spam rate in week one is skipping the foundation.

How much does a Klaviyo agency cost?

A Klaviyo agency runs anywhere from a few hundred dollars to about $10,000 a month. Clutch's email marketing pricing guide says monthly packages "start at $200 per month," larger packages cost "nearly $10,000 per month," and US email agencies average $100 to $149 an hour (Clutch email marketing pricing). Those figures cover email marketing agencies in general, not Klaviyo specialists alone. The low end is usually template campaigns. The high end usually includes strategy, design, copy, SMS and testing.

Then there's Klaviyo itself. Klaviyo prices email plans by active profiles, the people you can actually reach, and bills SMS separately (how Klaviyo pricing works). So your platform bill grows with your list, and cleaning out unengaged profiles can bring it down.

Cost line	Who you pay	What drives it
Agency fee	The agency	Number of flows, campaigns per week, SMS, design and copy
Klaviyo email plan	Klaviyo	Active profiles on your list
Klaviyo SMS	Klaviyo	Message volume, type and country
Supporting apps	App vendors	Reviews, loyalty, quizzes, pop-ups

Wadabu's email and retention service is $3,000 a month, or part of the $10,000 bundle with paid ads, SEO and AI search, and site and CRO, all run to one blended MER target. See email and retention for scope.

What results are realistic as a share of revenue?

There's no neutral, platform-published benchmark for the share of total store revenue that should come from email and SMS. Klaviyo publishes the split between flows and campaigns, not share of store revenue. One ecommerce finance firm's 2026 estimate, triangulated from platform benchmarks and its own portfolio, puts owned email and SMS at 20% to 40% of total revenue, with a typical figure near 28% (Eightx). Treat that as directional, not a target to hold an agency to.

Two things move the number more than the agency does. First, product type: consumables that get reordered usually beat a once-a-decade purchase. Second, attribution. Klaviyo credits an order to a message when an eligible touchpoint falls inside the attribution window. For new accounts the defaults are 5 days for email opens and clicks, 5 days for SMS clicks and 12 hours for SMS deliveries, and the touchpoints and windows can be changed in settings (Klaviyo conversion tracking). So some of those orders would have happened anyway. Ask any agency which attribution settings its numbers use.

Worked example: reading the share honestly

Say your store does $200,000 in a month and Klaviyo attributes $50,000 to email and SMS. That's 25% of revenue. Sounds good. Now check two things. How much of that $50,000 came from flows versus campaigns? And did total store revenue go up when email went up, or did email just claim orders paid ads already drove?

That's why it helps to look at blended numbers too. If email and SMS are working, MER (total revenue divided by total marketing spend) should tend to improve over time, because repeat orders cost little to generate. If attributed email revenue climbs but MER and repeat purchase rate don't move, the program may be mostly taking credit. MER can also shift for reasons that have nothing to do with email, like a push on new customer acquisition or a seasonal swing, so read it alongside repeat rate and cohort revenue. More on that in what MER is and why it beats ROAS, and on which orders actually make money in the contribution margin formula.

What are the red flags in a Klaviyo agency?

Watch for agencies that report only Klaviyo-attributed revenue, never mention deliverability, send the same campaign to the whole list every time, or lean on discounts in every send. Also watch for anyone who wants to move your list into their own account. Your Klaviyo account, your list and your flows should stay yours. If you're hiring for more than email, what a Shopify marketing agency should do and cost and how to hire a DTC growth agency cover the wider scope.

Final thoughts

Hire a Klaviyo agency once you have steady orders, a growing list and flows nobody owns. Have it build and test the core flows before it touches the campaign calendar, keep the account in your name, and judge the work on whether blended MER improves, not just on what Klaviyo claims. If you want a second opinion on your setup, talk to Wadabu.

Frequently asked questions

How much does a Klaviyo agency cost?

A Klaviyo agency typically costs from about $200 a month for basic packages to nearly $10,000 a month for full programs, according to Clutch's email marketing pricing guide, which covers email marketing agencies in general. US email agencies average $100 to $149 an hour. Klaviyo's own platform fee is separate and scales with the number of active profiles.

When should a Shopify store hire a Klaviyo agency?

A Shopify store should hire a Klaviyo agency when it has steady order volume, a growing list and no one owning email and SMS. Common signals are flows that were never tested, campaigns sent without a calendar, a flat repeat purchase rate and plans to add SMS.

What Klaviyo flows does a Shopify store need?

Most Shopify stores need a welcome series, abandoned cart, browse abandonment, post-purchase, winback and sunset flow, plus replenishment for consumable products. Klaviyo's 2026 benchmarks show email flows generate nearly 41% of email revenue from 5.3% of sends, so these come before campaigns.

What percentage of revenue should come from Klaviyo?

No platform publishes an official benchmark for the share of store revenue from email and SMS. One 2026 estimate from an ecommerce finance firm puts owned email and SMS at 20% to 40% of total revenue, with a typical figure near 28%. The real figure depends on product type, repeat purchase rate and attribution settings.

Is Klaviyo SMS worth it for a Shopify brand?

Klaviyo SMS is often worth testing once email flows are built. Klaviyo's 2026 SMS benchmarks show SMS flows make up 7.6% of sends but drive 45.2% of SMS revenue. SMS is billed separately from email, and Klaviyo requires that individuals explicitly agree to receive texts, so start with flows before broad SMS campaigns.

Should a Klaviyo agency own the Klaviyo account?

No. The brand should own the Klaviyo account, the list and the flows, and give the agency user access. If the account sits under the agency, the brand risks losing its subscriber data, flow history and attribution records when the relationship ends.

Written by Andrew Zam, Founder of Wadabu, a growth marketing agency for consumer-brand startups.