Hiring an agency to run your Klaviyo account is one of the highest leverage decisions a growing ecommerce brand can make. The right partner builds a system that quietly earns revenue for years. The wrong partner builds half a system that breaks, costs you sales, and leaves you with a Klaviyo account so tangled that the next agency has to start over from scratch.
The problem is that almost every email agency in the world looks roughly the same on the surface. The pitch deck talks about strategy. The case studies show big revenue numbers. The website promises a transformed channel. Founders evaluating agencies often end up choosing based on price, vibes, or who replied to their contact form first. None of those are good criteria.
This is a buyer’s guide built around the questions we wish more founders asked when they were evaluating us, and the red flags we have seen burn brands again and again. Use it as a checklist the next time you are sitting on a discovery call with an agency you are considering.
Specialist Or Generalist Matters More Than You Think
The first thing to clarify is whether the agency actually specializes in Klaviyo, or whether email is one of ten services they happen to offer alongside paid ads, SEO, social media, and web design. The two are not equally good at this work.
A specialist Klaviyo agency lives inside the platform every day. They know the flow logic, the segmentation quirks, the deliverability tools, the integrations with Shopify and other platforms, and the small details that separate a flow that runs from a flow that earns. They have seen hundreds of accounts and they know what good and bad look like at a glance.
A generalist agency, by contrast, treats email as one channel among many. The person setting up your flows is often the same person running your paid ads and writing your social posts. They are competent, but they are spread thin, and they tend to apply broad marketing thinking to a platform that rewards depth.
Neither is automatically wrong. Some brands genuinely benefit from one agency handling everything. But if email is going to be a meaningful channel for your business, and for most ecommerce stores it should be, a specialist will almost always deliver more revenue per dollar than a generalist will.
Questions That Tell You Who You Are Really Hiring
These are the questions we recommend asking on every discovery call, regardless of how the agency presents itself.
What flows do you build in your starter or onboarding package, and what is the logic behind that selection? A serious agency can explain not just what flows they build, but why those flows in that order for your stage of business. If the answer is generic or vague, you are looking at a checklist build rather than a strategic one.
Who actually does the work on my account? Some agencies sell you on the founder’s expertise and then quietly hand the account to junior freelancers you never meet. The right answer is clarity. You should know exactly who is writing your copy, who is building your flows, and who is reviewing the work before it ships.
How do you measure success, and what reports will I receive each month? Look for clear answers grounded in real metrics. Email attributed revenue, revenue per recipient, flow performance, list growth, and deliverability signals are the basics. If the agency talks vaguely about open rates and engagement without naming dollars, push harder.
What does the first 30, 60, and 90 days look like? A good agency has a clear playbook. The first month is usually audit, strategy, and foundation flows. The second month builds out segmentation and additional flows. The third month focuses on campaign cadence and optimization. If the agency cannot describe this clearly, the work will probably feel disorganized once you sign.
How do you handle deliverability? This is the question that separates serious operators from amateurs. The right agency will mention things like sender domain authentication, list hygiene, segmentation by engagement, warm up plans for new sending domains, and ongoing monitoring of inbox placement. If the question gets a blank look or a generic answer, run.
Red Flags That Should Stop You Cold
Some warning signs are worth paying close attention to, even when everything else looks good.
Long contracts with no early exit. A confident agency does not need to lock you in for twelve months. A month to month structure, or a fixed initial build period followed by month to month services, is the modern standard. Long contracts protect the agency, not you.
Vague case studies with eye watering numbers. If an agency claims to have generated tens of millions for clients but cannot show you the work, the brands, or the structure of the engagement, those numbers are essentially marketing copy. Real case studies have names, real metrics, and ideally a testimonial from the actual brand.
No clear ownership of your data and account. Some agencies set up Klaviyo accounts in their own name or restrict admin access. This makes you dependent on them long after you should be. The right structure is that you own your Klaviyo account, your data, your domains, and your full admin access from day one. If you ever leave, you take everything with you.
Promises of specific revenue numbers before they have seen your store. Any agency that quotes a revenue figure on the first call, before they have looked at your account, your traffic, your products, or your existing email setup, is either guessing or selling. Real numbers come after a real audit.
No process for ongoing testing and optimization. Building flows is the start, not the finish. A good agency keeps testing, keeps refining, and keeps improving the system every month. If the agency treats the engagement as one big build followed by a quieter retainer, you will see initial gains and then a long plateau.
How Pricing Actually Works In This Industry
Klaviyo agency pricing varies wildly, and most of the variation comes down to what is actually included in the engagement. Roughly speaking, you will encounter three pricing structures in 2026.
Project based pricing is used for one time builds, typically the initial flow setup, account configuration, and signup form work. This usually ranges from a few thousand dollars for a starter package to high four or low five figures for a full ecommerce email system with SMS. The work has a defined scope and a clear deliverable.
Monthly retainers are used for ongoing campaign and optimization work. This covers planning and sending your monthly campaign calendar, refining flows, building new segments, and reporting. Retainer pricing depends heavily on send volume, campaign frequency, and the complexity of your account.
Performance based or hybrid pricing is becoming more common, where part of the fee is fixed and part is tied to email attributed revenue or growth metrics. This can align incentives well, but read the fine print carefully. The metrics chosen and the attribution windows used can dramatically change what you actually pay.
The most important pricing question is not how much. It is what is included. A cheap engagement that delivers a half built system is much more expensive over time than a properly priced one that delivers a working channel. Look at total value, not headline price.
What Should Be Included In A Proper Flow Build
To avoid surprises, here is what a complete first time flow build for an ecommerce store should usually include. Use this as your scope checklist when reviewing proposals.
Full Klaviyo account configuration, integration with your store platform, and sender domain authentication. At least your four to seven core revenue flows, each one with custom written copy, fully designed emails matching your brand, and the segmentation and exit logic that makes them actually work. A signup form or popup to grow your list. Foundational list segmentation. A short audit and roadmap document explaining what was built, why, and what should come next.
If a proposal is missing any of these elements, ask why. Some are situational, but most are essential.
The Honest Answer About Choosing Us
We built EHABY around the things we wish more agencies offered. A specialist Klaviyo focus with no other distractions. A real in house team of four specialists, not a freelancer roster. No long contracts. Full data and account ownership from day one. Clear monthly reports. Honest pricing. And a real commitment to building systems that actually earn, measured against real benchmarks rather than vague promises.
If you are evaluating Klaviyo agencies right now and you want a no pressure conversation about what your store actually needs, book a free strategy call with our team. Even if we end up not being the right fit, you will leave with a clearer picture of what to look for in the agency you do choose.