methodology / Email & Communications / #80

Email Service Provider (ESP) detected

live factor #80 · Email & Communications · scoring impl: implemented · weight 0.3%

What we measure

We identify whether you're running a real email marketing tool. Detected providers: Mailchimp, ConvertKit, Klaviyo, ActiveCampaign, HubSpot, Substack, Beehiiv, Brevo, Drip, Buttondown. None detected often means you're missing the channel entirely.

How to improve your score

Pick one based on your audience and budget. Mailchimp is the default for most small businesses; ConvertKit for creators; Klaviyo for ecommerce; HubSpot for B2B with sales workflows.

Data source

Data source for this factor is not yet documented.

Implementation notes

Pattern-match script srcs (e.g., `chimpstatic.com`, `convertkit.com`, `klaviyo.com`), form action domains, and known embedded scripts.

Scoring

Scoring formulas are versioned with the methodology. The current method (v1.1.0) maps raw measurements to pass, warn, fail. Factor weights determine how much each contributes to the composite — see the methodology index for the full table.

Version history

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