Which email provider and CMS does a company use? Check 1,000 domains in one run

Description and use

The Tech Stack Detector automates email provider and CMS detection for up to 1,000 domains, saving hours of manual effort.

Problem

Sales and IT teams need to know a company’s email provider (Google Workspace or Microsoft 365) and CMS (WordPress, Shopify, etc.) for many domains efficiently.

Outcome

The actor processes 4 domains in 8 seconds, correctly identifying Google Workspace, Microsoft 365, and GoDaddy Email providers and their MX records, while also detecting CMS and other stack components for large lists.

Workflow

• 1. Prepare a JSON payload with a list of domain URLs and set "checkDns": true.
• 2. Submit the payload to the Tech Stack Detector actor on Apify.
• 3. The actor resolves each domain’s MX records to identify the email provider.
• 4. It fetches the homepage, parses HTML, headers, and cookies to detect the CMS and other stack components.
• 5. Results are returned as a table of domain, emailProvider, MX, CMS, etc. (and other stack info).

Evidence

Both answers are public. The email provider is in the domain's MX records; the CMS is in the HTML, headers and cookies of the homepage.

Source

Tech Stack Detector reads both for a whole list.

Source

A real run (4 domains, 8 seconds):

Source

TXT verification records are not an email provider.

Source

Redirects change the domain.

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