Email Marketing Signal Check: Klaviyo, Mailchimp, Brevo
Pricing
from $1.00 / 1,000 url check results
Email Marketing Signal Check: Klaviyo, Mailchimp, Brevo
Sort an existing website list by visible Mailchimp, Klaviyo and Brevo signals. Paste URLs; download provider-specific CSVs with evidence links. No signal and unverified results stay separate. Static HTML checks, not contact discovery.
Pricing
from $1.00 / 1,000 url check results
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Herry
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4 days ago
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Sort a website list by visible Mailchimp, Klaviyo or Brevo signals
Paste a list of websites and download separate provider lists with evidence links. Use them to review an existing prospect list, audit visible signup integrations or prepare a manual technology review.
Best for: email marketing agencies, ecommerce consultants and researchers who already have website URLs and need a first-pass shortlist of these three platforms.
The tool checks supported patterns in the supplied pages' static HTML. A detected reference is evidence to review; it does not prove that the website has an active or paid subscription.
Try one website
- Open Input and paste website URLs into Websites, one per line. A domain without
https://is accepted. Replace the sample with your own list when ready. - Set Maximum charge per run to $0.01 for this one-site example, then click Start. This is a spending cap, not a fixed fee.
- After Succeeded, read Providers found, Evidence links and Next step. Choose Mailchimp CSV, Klaviyo CSV or Brevo CSV to download a shortlist.
This independent example has returned a Mailchimp signup-form reference in our technical tests. Live pages can change; the website is not a customer or partner of this tool.
For a useful first trial, check a few sites whose integrations you can confirm manually, then compare the evidence before processing the full list.
Keep detected, absent-from-the-page and unverified results separate
| Observation | Meaning | Download |
|---|---|---|
| observed | At least one supported pattern was found. The result includes the provider and the source reference. | A provider-specific CSV, or All detected providers CSV. |
| not_observed | None of the supported patterns appeared in the fetched static HTML. This does not prove the site does not use the platform. | No signal observed CSV. |
| unknown | A block, error, non-HTML response or incomplete page prevented a reliable check. | Unverified CSV for manual follow-up. |
A website with more than one detected provider can appear in multiple provider lists. Checked rows CSV includes every result; Readable report is an HTML overview. Select a named CSV in the output selector, then use Download on its file row. To export the dataset as Excel, choose Export → Excel → Download.
Each result also includes the requested URL, final URL, HTTP status and check time. Evidence identifies the HTML tag, attribute and referenced URL; query parameters are removed from the evidence link.
Exactly which installations are detected?
| Platform | Supported visible pattern |
|---|---|
| Mailchimp | A form action on a list-manage.com subdomain with /subscribe/post or /subscribe/post-json. |
| Klaviyo | A script src or data-src on static.klaviyo.com, under /onsite/js/, ending in klaviyo.js. |
| Brevo | A script src or data-src at cdn.brevo.com/js/sdk-loader.js. |
Only the pages you supply are checked. The tool does not crawl the whole website or run JavaScript. Tag-manager installations, dynamically inserted forms, inline loaders, old Sendinblue trackers, server-side integrations and signals on other pages can be missed. A stale or disabled reference can still be detected. Use this as a shortlist with evidence, not a complete technology inventory.
Pricing
$1 per 1,000 website checks ($0.001 each), plus $0.00005 per run start at supported memory settings. Platform usage is included.
One completed check costs $0.00105; 100 cost $0.10005. All delivered diagnostic rows are charged, including not_observed and unknown. The price is per supplied page checked, not per provider found or qualified lead. The supplied report files have no separate Actor event fee.
Set the run cap above the website count × $0.001, plus the start fee. Run budget too low means the Actor stopped before website requests or result writes; reduce the list or raise the cap. A start fee can still apply. Interrupted runs can leave billed partial output. Treat a batch as complete only after Succeeded and OUTPUT.status: complete.
Limits and API use
Up to 1,000 URLs, 1 MB input, 2 MB response content and five redirects per check. Default memory is 256 MB (512 MB maximum); default run timeout is 3,600 seconds. No login, browser rendering, proxy or automatic retry is used. The tool does not discover new websites, extract email addresses, send messages or verify email deliverability.
For integrations, clear Websites and send checks: [{"url": "https://mikedaleymusic.com/"}]. JSON keeps the structured evidence array; the normal form only needs one URL per line. No history or alert schedule is created automatically.
Input and results stay in the initiating Apify account's storage. Target pages receive anonymous requests; signup forms are not submitted and external scripts are not executed.
Need help? Use Issues with a non-confidential website URL, the provider you expected and the actual result. A missing signal is useful feedback about coverage, not proof that the website has no email marketing tool.
