Starting at Only $20/mo

All ListDefender Accounts Include...

  • Best In Class Email Validation: We validate whether emails are deliverable, have valid dns records, mx records and any other technical requirements consistent with real emails.
  • Unlimited Form Protection: Stop bots, spam, typos, and fakes from getting on your lists without stopping your legitimate leads and customers.
  • SmartScan Technology: We intelligently monitor and maintain your list's health based on subscriber validity, quality, and engagement with comprehensive scans, instant scans and daily engagement checks on your new subscribers, weekly engagement audits, and more!
  • Built-In Direct Integrations: We have a direct connections with HighLevel and Keap (more to come!) and automated tagging so you always know who to send to, and who to avoid. 
  • Simple Pricing: Pricing is based on number of contacts (we exclude contacts already opted-out or non-marketable). 
List Size Monthly Price Estimate
Up to 2,500 Contacts $20/mo
Up to 5,000 Contacts $35/mo
Up to 10,000 Contacts $55/mo
Up to 25,000 Contacts $100/mo
Up to 50,000 Contacts $175/mo
Up to 100,000 Contacts $285/mo
Use our Pricing Calculator for a more precise estimate!

(You'll see your exact pricing before you pay anything)

Frequently Asked Questions

Here are some of the most common questions we hear.

What Email Marketing Systems Do You Support?

  • We currently connect with HighLevel and Keap.

What's included?

  • ListDefender includes advanced form protection, engagement tracking, and routine list cleaning.

I already have Klean13, why should I use you?

  • Klean13 is a convuluted, manual list cleaning service, generally used for one-time list cleanings. 
  • We do list cleanings regularly for much less.
  • In addition, we provide form protection (think SpamKill)
  • Unlike Klean13, we look at engagement as another factor for who you should email or not.

I already have SpamKill, why should I use you?

  • SpamKill is limited on what kinds of forms it can actually work with, ours can be standalone.
  • SpamKill does not protect you from bots that bypass your form controls and mailciously adds scraped emails to your list
  • Form protection is just one piece of keeping a list clean. We include list cleanining and engagement tracking...so you don't have to pay more on other tools

I already have EmailSmart, why should I use you?

  • EmailSmart is great for delivery monitoring, but ListDefender stops bad leads at the source, protects your forms, and automates ongoing list cleanup.
  • EmailSmart relies on clunky integrations with Klean13 and SpamKill. ListDefender does it all in one place—no extra tools, no extra headaches, no confusing bloat.
  • And save money not having to subscribe to multiple tools

What ListDefender Users Say

People are loving what ListDefender is doing for their deliverability protection.

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Screenshot 2025-02-26 at 4.46.58 PM