The Sendinblue Newsletter plugin (now branded under Brevo, with the older Sendinblue name still installed on many sites) is the WordPress signup bridge into the Brevo platform. It persists the API key, account ID, default list IDs and a consent string into wp_options, and it stamps per-form list routing onto the signup blocks and shortcodes it ships, plus the Contact Form 7 and WPForms integrations.

The plugin admin walks an operator through API setup and form embed; it does not surface the operational picture. There is no dashboard for how many signup forms exist across the site, which Brevo list absorbs the most signups, whether the consent string drifted, or when each bridge last fired. Compliance and marketing both need that view, and the plugin admin doesn't provide it.

SleekView Charts reads the plugin's WP-side data directly. A Number card anchors total active signup embeds. A Pie splits signups by Brevo list. A Bar ranks parent posts by signup volume. An Area trends signups per day so the marketing lead sees the curve rather than the latest number.

The Sendinblue-to-Brevo rebrand left a long tail of WordPress installs running the legacy plugin while the SaaS has moved on, and the WP side rarely gets the audit it deserves before a migration. A signup form that went missing, a list ID that points at a renamed Brevo list, a consent string that drifted on staging: each of those questions lives in wp_options and per-form postmeta, and the plugin admin doesn't answer any of them at a glance. Charting embed count, list routing and signup cadence turns the migration planning meeting from a guess into a checklist.

Same Sendinblue plugin data the bridge already reads at runtime, organised so the migration team and the marketing lead can both see the WP-side footprint before the rebrand cleanup begins.