ListDefender is a protection layer built specifically for Keap users to block bots on forms, continuously scan and clean contact lists, and protect sender reputation — before deliverability problems hurt your business.
If you use Keap to run your business, bots, fake leads, and low-quality sign-ups can quietly poison your contact list and damage email deliverability over time.
Most businesses don't realize there's a problem until open rates drop, emails start landing in spam, or campaigns stop performing the way they used to.
ListDefender adds a Keap-specific protection layer that blocks bad data at the form level, runs continuous list scans, and preserves sender reputation — before problems surface.
Keap is excellent at automation, follow-up, and CRM workflows — but like every platform, it can't fully stop bots, fake sign-ups, and low-quality submissions before they enter your system.
That's where businesses get hurt.
Once bad data is inside Keap, the damage compounds over time — and the root cause is often hard to trace back to the original submissions.
ListDefender protects Keap users with three automated layers, working together continuously.
Blocks bots, fake sign-ups, disposable emails, and junk submissions before contacts are created in Keap. ListDefender goes beyond basic validation with advanced quality checks that detect form stuffing and bypass attempts automatically.
Runs your first full scan immediately, then performs ongoing SmartScans to keep Keap lists clean, deliverable, and safe to send to.
ListDefender continuously monitors engagement and automatically manages contact status over time. As contacts engage or disengage, they are moved between safe-to-send and suppressed states — so you always know who belongs in your sends and who doesn't. This protects inbox placement and sender reputation without manual segmentation.
Securely connect ListDefender to your Keap account in seconds.
ListDefender scans your database while blocking bots on forms in real time.
Dozens of scans run each month to protect long-term deliverability.
ListDefender exists because real businesses were attacked.
Coordinated bot traffic flooded forms, polluted contact databases, and quietly damaged deliverability across multiple systems.
Those failures exposed the gaps ListDefender was built to close.
That's why businesses turn it on before problems surface, not after damage is done.
ListDefender is designed for:
If email performance matters to your revenue, this is infrastructure — not an add-on.
ListDefender works just as well for individual businesses as it does for Keap consultants and service providers.
Whether you manage your own Keap account or help others do it, ListDefender fits cleanly into your workflow.
"Welp...I happened to notice some weird stuff going on with contact id's. We've spanned hundreds already this morning, which makes no sense. So I look at how many spam submissions have already been filtered today. Already 2k just this morning. Nearly 100k in the past 30 days. Holy crap. Thanks so much for building this tool!"
"ListDefender Saved Our Business! Our email deliverability plummeted and our business was slowly being choked out and no one could identify what was going on. ListDefender identified the issue immediately and stopped the bots, removed the bad accounts, and got us back on track. What ListDefender accomplished in hours, Klean13 and multiple tech agencies couldn't do at all. We won't run our business without it again."
"I do want to say, it is STAGGERING the amount of bots ListDefender is catching....lol. Look at this image with the sheer number and you can see the list of bot submissions. We are in the middle of a big promo and generating a lot of leads and WOW, just WOW!"
"ListDefender has given us a clear & accurate view of the contacts in our CRM. It's helped protect our reputation by identifying bots and reducing spam complaints, keeping our deliverability strong and our lists healthy. Maintaining this level of visibility and control used to be nearly impossible; now I couldn't imagine operating without it."
Your Keap results depend on clean data and reliable inbox placement.