ListDefender

# ListDefender > ListDefender is an email list protection platform that automatically cleans email lists, blocks bots and fake signups, and manages subscriber engagement for small businesses. ListDefender solves the three core problems that damage email sender reputation: invalid and decayed addresses accumulating on your list, bots and fake contacts entering through your forms, and unengaged subscribers dragging down deliverability metrics. It integrates directly with CRMs and email platforms—with setup taking under 60 seconds—and works continuously in the background without requiring manual intervention. The platform's three protection layers are: SmartScans for automated list cleaning (domain and MX record verification, SMTP verification, disposable address detection, role-based email identification, catch-all domain checks, and more); FormDefender for real-time bot blocking using behavior analysis and device fingerprinting; and engagement management for auto-tagging contacts in the CRM based on opens, clicks, and activity so unengaged subscribers can be identified and suppressed before they cause deliverability damage. All contacts are automatically tagged in the CRM based on validation status (Green - Safe to email, Yellow - Re-engage, Red - Do not email). Pricing starts at $20/month based on marketable contact count. Platform statistics: 300M+ emails cleaned and validated, 1.75M+ bots and fake sign-ups blocked, 2.5M+ valid real subscribers added, 4.9/5 aggregate rating from 127 reviews. ## Technical Details SmartScans perform the following checks, most of which are individually configurable: domain and MX record verification, SMTP verification, undeliverable address check, disposable address check, vulgar/inappropriate content check, suspicious content check, role-based address check, tag address check, free/business address check, and catch-all domain check. FormDefender Enhanced Mode adds an additional layer of protection against sophisticated bots by validating that new contacts have been appropriately vetted before they receive emails, and can quickly delete contacts that should not have been created. ## Core Pages - [Home](https://listdefender.com): Main landing page with product overview, features, pricing calculator, and customer testimonials - [Features](https://listdefender.com/features): Detailed breakdown of all three protection layers: SmartScan list cleaning, FormDefender bot protection, and engagement management - [Pricing](https://listdefender.com/pricing): Plans starting at $20/month based on marketable contact count, with an interactive calculator and comparison between Complete protection and Form Protection Essentials tiers - [FAQ](https://listdefender.com/faq): Frequently asked questions covering setup, features, pricing, CRM integrations, and security - [Demo](https://listdefender.com/demo): Book a private walkthrough or watch product demonstrations - [Transparency](https://listdefender.com/transparency): A transparent account of coordinated cyber attacks against ListDefender and how the source was confirmed ## Integrations ListDefender integrates with the following platforms. Each has a dedicated page covering platform-specific setup, features, and use cases: - [HighLevel](https://listdefender.com/highlevel): List cleaning, bot-blocking form protection, and engagement management for HighLevel users and agencies managing multiple client accounts - [Keap](https://listdefender.com/keap): List cleaning, bot-blocking form protection, and deliverability management for Keap (formerly Infusionsoft) users - [ActiveCampaign](https://listdefender.com/activecampaign): List cleaning, bot-blocking form protection, and deliverability management for ActiveCampaign users - [Kit (ConvertKit)](https://listdefender.com/kit): List cleaning, bot-blocking form protection, and deliverability management for Kit (ConvertKit) users - [ClickFunnels](https://listdefender.com/clickfunnels): Bot blocking on ClickFunne […gekürzt]