The free two-numbers check
Compare Shopify’s email-subscribed count with Klaviyo’s active email count. See what to check next, without assuming a difference means something is broken.
You can read the instructions now and return on a computer. Type this address on the device where you use Shopify and Klaviyo:
higherself.ai/two-numbersUse the subscribed email segment, not all customers, purchasers or SMS subscribers.
email_subscription_status = 'SUBSCRIBED'Use the directly displayed active email count. Do not subtract suppressed profiles from Total profiles.
Use counts taken at roughly the same time. This compares totals, not the people in them or their permission to receive email.
The comparison runs in your browser. This checker does not send or save the counts you enter. About this page and your data.
Your count comparison
The full checklist also works without the calculator. Start with the explanation most relevant to your counts.
Compare a small sample of the same profiles in your own accounts, including subscription and suppression states. Equal counts can describe different people. A sample can reveal a discrepancy, but cannot establish complete agreement.
Confirm the store, account and email categories. Review suppression reasons for matching profiles, then the latest synchronisation and any mapping or integration errors. Suppressions can be legitimate. Do not remove them merely to make the counts agree.
Look at imports, signup forms and integrations that add profiles outside Shopify. Klaviyo’s active email category can include people who have not explicitly subscribed. A larger count is not permission to email everyone in it.
Make sure you are in the intended store and email account. Check that you selected the email-specific categories and did not retain unrelated filters. If either account genuinely has no matching profiles, a zero total is valid; it does not test the connection.
What this check can establish: whether the two totals you entered differ, and a sensible place to investigate. It does not diagnose the cause, establish consent or measure lost revenue.
Optional / after the free check
For £150 fixed, I verify the agreed Shopify and Klaviyo figures using authorised evidence or access and provide a concise written result. This is a system check, not diagnosis or repair.
The free tool is enough for arithmetic. The paid check adds human verification and a written record. Any deeper investigation is optional and separately scoped; public-source analysis cannot diagnose private account settings.
Counts stay in the checker. They are not added to links, copied page addresses or email destinations. Clearing the checker removes the entries and result. No email or shared account access is required.
Loading a web page creates ordinary requests to its host. An email you deliberately send is a separate communication and contains what you choose to write. See the privacy notice.
Interface instructions checked against the linked platform documentation on 5 September 2026. Labels can change; use the email-specific definitions above.