The Engine Diagnostic · free
Your retention engine, audited properly.
Free, before you decide anything: we get real access, dig into your Klaviyo, Shopify and subscription data the way we would for a paying client, and hand back a prioritised plan for your next 90 days. Yours to keep either way.
Trusted by 70+ brands
"Our programme has improved significantly since working with them. Retention has improved, our subscribers are more engaged, and we're seeing real commercial impact from the channel."
Adam Oxley · Co-Owner, Discount Supplements
You've seen "free audit" before
Every agency offers an audit. Most of them are one of these.
- Exhibit 01
The benchmark dump
A spreadsheet of your numbers next to "industry benchmarks" and a note saying you're below them. Nothing about which levers to pull, or where to start.
- Exhibit 02
The templated checklist
The same forty rows every brand gets, scored against nothing that resembles your business, attached to a calendar link.
- Exhibit 03
The pitch in disguise
Two slides about your account, seventeen about the agency. The "findings" all happen to be things they sell.
- Exhibit 04
The opens-and-clicks review
Channel metrics with no money attached. Nothing about churn, margin, or how many of your customers ever come back.
If an audit doesn't change what you do next Monday, it wasn't an audit. Here's how a real one works.
How the diagnostic works
We look at your business before we open Klaviyo.
Your business
Your goals, then your customer file: how many customers come back, and whether your customers, subscribers and list are growing or shrinking.
Your account
Flows, campaigns, forms, deliverability, tracking and subscriptions, measured on store-level numbers rather than attributed revenue.
Your levers
The two to four changes worth most to your revenue, each backed by evidence and scored on impact, confidence and ease. Anything broken gets fixed first.
Your next 90 days
What happens at 30, 60 and 90 days, with a growth model of what it could be worth. If we work together, it becomes your roadmap with go-live dates.
Sneak peek
See it before you request it.
A page from the diagnostic, rebuilt with sample data. Yours uses your real numbers, and real numbers are less polite.
Engine score
58/100
Where it leaks
The plan, ranked by impact
- 01 Rebuild post-purchase to drive the second order
- 02 Turn active one-time buyers into subscribers
- 03 Recover failed payments before they become cancels
- 04 Win back lapsed buyers before the list goes cold
- 05 Rebalance campaign segmentation
For subscription brands
Run subscriptions? We look at when subscribers join and leave, why, and what they're on.
The diagnostic looks at each one and how they connect, so you can see which is holding your programme back and where to start.
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When + why
Churn by type and timing
We look at churn by type: subscribers who choose to cancel, subscribers lost to failed payments, and day-0 churn from people who take the sign-up offer and cancel straight away. We also read cancel reasons alongside how long each subscriber had been with you, as the same reason can point somewhere different early on than it does a year in.
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Why + what
Reasons by product and plan
We match each cancel reason to the products and plans it comes from, so the fix goes where the problem is. Then we look at what gives subscribers a reason to stay beyond the discount, like membership benefits and rewards that build over time.
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When + what
Products and plans over time
We compare how long subscribers stay on each product, plan and offer, and which products prospects and one-time buyers are most likely to subscribe to. It also points to the right time for an upgrade, add-on or cross-sell.
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Where all three meet
Lifetime value
When the three line up, subscribers stay longer, add more to their orders and sit on the products and plans that fit their goals and routine. The diagnostic shows which of the three is holding your lifetime value back.
No subscription programme? The same rigour goes into repeat purchase: getting more first-time buyers back for a second order, and growing the repeat revenue behind it.
What the plan turns into
Every engagement starts with this exact audit. Then this happens.
Every number below is verified client data from a full case study on this site.
+227%subscription orders in year oneRead the full story → 
22% → 56%returning-customer share of revenue in 8 monthsRead the full story → 
+58%returning customer sales in 12 monthsRead the full story → Name withheld 9% → 35%subscription save rate for a UK electrolytes brandRead the full story → ★★★★★
"Will they go quiet after month one?"
"Every week, without fail, there's an update in our inbox. No chasing, no wondering what's happening, it just arrives."
★★★★★
"Is this just email?"
"Everboost go beyond email to consider retention improvement across the board. I couldn't recommend them more."
★★★★★
"Do the results actually come?"
"We saw a 20% increase in revenue in just three months. The best part has been the consistent communication and detailed feedback we receive."
How it works
From intro call to plan in about a week.
Book an intro call
Thirty minutes, consultative. We hear the story behind your numbers, you hear exactly how the audit works, and we decide together whether it's worth running. If the honest answer is that you don't need us yet, you'll hear that too.
Share access
Manager access to Klaviyo and your subscription platform, plus Shopify. Deep access is what separates a real audit from a dashboard skim: it lets us dig into flows, segments and customer data properly. About fifteen minutes of your time to set up.
The diagnostic lands
Within about a week: the findings, the lifecycle review and the prioritised plan, walked through together so every recommendation comes with the evidence behind it.
You decide
The plan is yours to keep either way. If you're open to working together, we'll put a proposal in front of you on a follow-up call, and we'll be upfront about that from the start.
We build a handful of diagnostics a month alongside client work. If the calendar is full, you get the next slot, not a rushed audit.
Fair questions
Asked by founders like you.
Is it actually free, or a pitch in disguise?
It's free, and it's the same diagnostic every Everboost engagement starts with, so we build it properly regardless of what happens next. We're upfront about the commercial side on the intro call: if you're open to it, we'll put together a proposal and present it on a follow-up call. If you're not ready for that conversation, the plan is still yours to keep.
What do you need from us?
Manager access to Klaviyo, Shopify and your subscription platform (Loop, Skio, Recharge or similar), plus a short intro call for context. Deep access is what makes the audit genuinely useful: it lets us dig into the data properly instead of reading the same dashboards you already look at. About fifteen minutes of your time to set up.
How long does it take?
About a week from access to walkthrough. We build a handful of these a month alongside client work, so slots are subject to availability. If the calendar's full, you get the next slot rather than a rushed audit.
What if we don't want to work with you afterwards?
The plan is yours and there's no obligation. We'll be honest about why the audit is free: brands who see exactly where their revenue is leaking usually want the team that found the leaks to fix them. If the timing isn't right for you, we'll check back in further down the line, and that's as pushy as it gets.
Who actually builds it?
A senior strategist on the Everboost delivery team. Not a junior with a checklist, not a template with your logo on it. Every audit is built from your live data, from scratch.
Do we need to run subscriptions?
No. If you run a subscription programme the audit goes deeper: when subscribers join and leave, why, and what they're on, from failed payments to upgrades and rewards. If you don't, the same rigour goes into repeat purchase: getting more first-time buyers back for a second order, and growing the repeat revenue behind it.
Where to start
Your numbers already know where the leaks are.
Book the intro call. If the audit is worth running, you'll have a prioritised plan inside a couple of weeks: your next 90 days, in order.
Book an intro call →Trusted by 70+ brands