Subscriber intelligence for newsletters and B2B lists

Find out who actually reads your newsletter.

Closed Loop Enrich matches your subscribers to public professional profiles, grades each one against the customer you describe, and writes the result back to your email platform as fields and segments.

Open the preview Sign in

The preview is a demo workspace with synthetic subscribers — no sign-up, nothing real.

How it works

  1. 1

    Connect or upload

    Bring a list from your email platform or a CSV. Invalid and duplicate addresses are set aside, and every address is marked business or free mail.

  2. 2

    Enrich, cheapest first

    Each subscriber is matched to public professional profiles, one cheap step at a time, stopping at the first confident hit and never above the cap you set.

  3. 3

    Grade against your customer

    Describe the reader you want in plain English. Every match gets a grade from A to D with a one-line reason you can read and check.

  4. 4

    Segment and write back

    Fit and engagement together make the segments. Fields and segments go back to your email platform after you approve them, and every write can be undone.

Closed Loop Enrich — find out who actually reads your newsletter