The Klaviyo audit checklist: what to check and why it matters

The short answer: A Klaviyo audit checks six things: whether your emails reach the inbox (deliverability), whether your list is healthy, whether your automated flows are complete and working, whether your campaigns are targeted, whether your segmentation is doing real work, and whether you're measuring revenue instead of opens. Fix them in that order.

You can run most of this yourself in an afternoon. Below is the full checklist, what each item tells you, and how to prioritize what you find.

1. Deliverability: can your emails reach the inbox?

Everything else is pointless if your emails land in spam. Check this first.

• Authentication is set up. SPF, DKIM, and DMARC are all configured for your sending domain. Without them, mailbox providers have little reason to trust you.

• You're sending from a dedicated sending domain. A branded subdomain, set up in Klaviyo, protects your main domain's reputation.

• Spam complaint rate is low. Big mailbox providers expect bulk senders to keep complaints well under 0.3%, and the safer target is under 0.1%. Anything higher is an emergency.

• Bounce rate is controlled. A rising bounce rate means old or bad addresses are on your list.

• One-click unsubscribe works. Mailbox providers now expect it for bulk senders, and it's good practice regardless.

What it tells you: whether your problem is the emails or the inbox. A brand with perfect copy and a deliverability problem has an inbox problem, not a copy problem.

2. List health: who are you actually sending to?

• You know your engaged versus unengaged split. Segment by recent opens and clicks (and treat opens carefully, see section 6).

• There's a sunset policy. People who haven't engaged in a set period get a final win-back attempt and then stop receiving mail. Mailing dead addresses drags down your reputation.

• Signup sources are known. Which forms, popups, and pages add subscribers, and which of those subscribers actually buy?

• Consent is clean. Every profile has a clear reason to be there.

• Signup forms are doing their job. Check conversion rates on popups and embedded forms, and whether the welcome incentive attracts buyers or only discount hunters.

What it tells you: whether list size is helping or hurting. A big, tired list can perform worse than a smaller, engaged one.

3. Flows: is the automated revenue engine complete?

Flows are the emails that work while you sleep. Klaviyo's benchmark data shows they produce around 41% of email revenue from just 5.3% of sends, which is why gaps here are the most expensive ones in the account.

Check that these exist and are live:

• Welcome series. Typically three to five emails that introduce the brand and set up the first purchase.

• Browse abandonment. For people who looked but didn't add to cart.

• Cart abandonment. For people who added to cart and left.

• Checkout abandonment. For people who started checkout.

• Post-purchase. Turns a first purchase into a pattern, and is the most commonly neglected.

• Replenishment. For consumable products with a natural reorder cycle.

• Win-back. For customers who've gone quiet.

• Sunset. Cleans up people who stopped engaging.

• VIP or loyalty. For your best customers.

• Back in stock. For products that sell out.

Mature programs run a dozen or more flows. Most stores run two or three.

Then check the quality of the ones you have: trigger and filter logic, timing between emails, whether flows overlap and double-message people, and when each was last edited. A flow nobody has touched in two years is rarely a good flow.

What it tells you: the size of your biggest opportunity. Missing flows are often worth more than any campaign you could send.

4. Campaigns: are you sending to the right people?

• Cadence is intentional. Not "whenever someone has time" and not "blast everything weekly."

• Campaigns are segmented. Sending the same email to the whole list is the default failure mode.

• Recent buyers are handled. They shouldn't get a "come back and buy" email the day after they bought.

• Subject lines and preview text are tested, not guessed.

• Templates hold up on mobile. Most opens happen on phones.

• You're not relying on discounts alone. A calendar made only of sales trains customers to wait for the next one.

What it tells you: whether your campaigns are building the relationship or just emptying the list.

5. Segmentation: is it doing real work?

• RFM or similar value segments exist. Recency, frequency, and monetary value separate your best customers from one-time buyers.

• Engagement tiers exist. Highly engaged, casual, and at-risk people shouldn't get the same cadence.

• New versus repeat customers are treated differently. A fifth-time buyer shouldn't get a first-date email.

• Product behavior is used. What people viewed, bought, and how often.

• Exclusions are in place. Who shouldn't receive a given message matters as much as who should.

What it tells you: whether your emails are personal or just personalized with a first name.

6. Measurement: are you tracking revenue or noise?

• You know your email share of revenue. Klaviyo-wide, email accounts for around 27% of store revenue on average, and mature programs reach 30–40%. If you're at 10–15%, that's the gap to size.

• Attribution settings are understood. Know the click and open windows your reports use, and how they inflate or deflate numbers.

• You see flows and campaigns separately. Their performance profiles are very different.

• Click-to-open and revenue per recipient matter more than open rate. Apple's Mail Privacy Protection inflates opens, so treat open rate as a rough signal at best.

• Reporting ties to revenue, not to vanity metrics like list size.

What it tells you: whether you can trust the numbers you're using to make decisions.

How to prioritize what you find

Fix in this order:

1. Deliverability. Nothing else works if emails don't arrive.

2. Core flows. Welcome, abandonment, post-purchase, and win-back first. This is usually the biggest revenue gain.

3. List health. Set up sunsetting and clean engagement segments.

4. Segmentation. Build the segments that campaigns and flows will use.

5. Campaigns and testing. Improve what you send once the foundation is solid.

6. Measurement. Fix reporting early, but expect to refine it throughout.

The 30-minute version

If you only have half an hour: confirm your domain is authenticated, list your three most important flows and check they're live, and export your baseline numbers (click rate, click-to-open, and revenue per recipient for flows and campaigns). That alone tells you whether you have a fundamentals problem.

What a good audit report gives you

Whether you run it yourself or hire someone, a useful audit ends with:

• A deliverability health check, with specific issues and fixes.

• A flow gap analysis against a mature program.

• A segmentation and list health review.

• A revenue gap estimate: where your email share of revenue sits today, and what closing the gap to 30% would be worth per month.

• A prioritized action list, so you know what to do first.

If an audit hands you a generic score and no priorities, it isn't an audit. It's a quiz.

Frequently asked questions

How often should I audit my Klaviyo account?

At least twice a year, and any time performance drops or your business changes (a new product line, a big jump in list size, a platform migration). A quarterly light check on deliverability and flows is even better.

Can I audit my own account?

Yes. This checklist covers most of it. An outside audit adds a benchmark comparison and a fresh set of eyes, and it's useful when you're not sure what "good" looks like for your category.

How long does a Klaviyo audit take?

A solid self-audit takes an afternoon. A professional audit takes longer because it includes the benchmark comparison and a written, prioritized report.

How much does a professional audit cost?

One-time audits and builds commonly run $2,000–$8,000 depending on scope. Ours is free for a limited time.

Want us to run it for you?

That's what our audit is. We go through your account against this checklist and give you a written report: deliverability, flow gaps, segmentation, list health, and what closing the gap is worth in revenue. Yours to keep, no call required.

Get the audit

Benchmarks are published Klaviyo figures and industry ranges, not Swyftlabs results. Last updated October 2, 2026.