Winback Engine (Grade A) logo

Winback Engine (Grade A)Security-tested data-ai skill for Claude AI. Grade A. Find dormant subscribers, segment by historical value, draft personalized winback emails per tier, and identify suppression candidates

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Daniel NikulshynReviewed by Daniel Nikulshyn·Updated July 2026

Overview

The Winback Engine is a security-tested data-ai skill for Claude AI, designed to help marketers win back dormant subscribers. It scans connected ESPs for inactive subscribers, segments them by historical value, drafts personalized winback emails per tier, and identifies suppression candidates. The skill requires Cogny MCP and a connected ESP, such as Klaviyo or Mailchimp. It automates the process of creating a complete, ready-to-run winback campaign, rather than just generating a report.

Key features

  • Dormant subscriber identification
  • Historical value segmentation
  • Personalized winback email drafting
  • Suppression candidate identification
  • Integration with Klaviyo, Mailchimp, Rule, and Get a Newsletter
  • Support for multiple winback modes (aggressive, standard, conservative)

Pricing

Model
Free
Category
Skills
Rating
No reviews yet

Use cases

Winback Campaign Automation

Automate the process of creating a winback campaign for dormant subscribers, including segmentation, email drafting, and suppression candidate identification.

Subscriber Reactivation

Use the Winback Engine to reactivate dormant subscribers by sending personalized winback emails, increasing the chances of re-engagement and conversion.

Pros & Cons

Pros

  • Automates winback campaign creation
  • Segments dormant subscribers by historical value
  • Drafts personalized winback emails
  • Identifies suppression candidates
  • Integrates with popular ESPs like Klaviyo and Mailchimp

Cons

  • Requires Cogny MCP and a connected ESP
  • Limited to specific ESPs, may not support all platforms
  • May require additional setup and configuration

Reviews

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Q&A

Are there any prerequisites before using Winback Engine?

Yes, you must have a Cogny MCP account and a connected ESP (Klaviyo or Mailchimp). If no ESP is detected, the tool will prompt you to connect one via cogny.com. Additional setup may be needed to configure thresholds and modes.

Asked by Ravi Kapoor · Jun 20, 2026

What is the output of a winback campaign in Winback Engine?

The skill returns a complete, ready‑to‑run winback campaign: segmented lists, personalized email drafts per tier, and a suppression list. It does not just produce a report; it automates the entire campaign creation.

Asked by Boris Yankov · May 22, 2026

How does the tool identify and segment dormant subscribers?

It scans the connected ESP for inactive subscribers using configurable dormancy thresholds (30, 60, 90 days) and segments them by historical value. The skill also flags suppression candidates based on no engagement or purchase patterns to protect deliverability.

Asked by Wei Chen · May 2, 2026

What ESPs does Winback Engine integrate with?

Winback Engine works with Klaviyo, Mailchimp, Rule, and Get a Newsletter through the Cogny MCP proxy. It currently supports Klaviyo for purchase history and engagement data, while Mailchimp, Rule, and Get a Newsletter provide engagement metrics only.

Asked by Quentin Lefevre · Mar 11, 2026

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