ListDefender, Inc.

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Jun 8, 2026

Gilbert, AZ

ListDefender Surpasses 300 Million Cleaned Emails as Fake Sign-Up Rates Hit a Five-Year High, Costing Small Businesses Measurable Revenue

New data from ListDefender shows bot-driven list contamination is accelerating — and most email marketers don't know it's happening until their sender score collapses.

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About ListDefender

ListDefender is an email list protection platform that combines real-time bot blocking, automated list cleaning, and engagement-based hygiene into a single solution for small business marketers. The platform integrates directly with Keap, GoHighLevel, ActiveCampaign, ClickFunnels, Kit, and other leading CRM and email marketing tools, eliminating the need for manual validation workflows. ListDefender has cleaned more than 300 million emails and blocked over 1.75 million fraudulent sign-ups across its customer base. Learn more at listdefender.com.