It has told you about none.
We'll get it wrong sometimes too. You'll get the lead back.
SpamKill is invisible form protection that decides after the form submits — nothing for real visitors to solve, 99.9% accurate across 100M+ submissions.
No credit card · Month-to-month after
Free WordPress plugin for comments and WooCommerce reviews. No CAPTCHA, no API key, free for commercial sites.
The bots it was hired to stop pay a solver farm pennies to pass it, or simply solve it: a 2023 USENIX Security study found bots outperforming humans on both speed and accuracy across every CAPTCHA type it tested. So the gate lets the bots through and keeps the people out — and you pay at both ends.
The squares appear when the CAPTCHA can't tell whether a visitor is human, and it settles the doubt by charging the human. Some solve it. The ones who don't never submit — the challenge gates the submit, so nothing left their browser. No lead. No conversion event. No name in any report.
In GA4, compare form_start to form_submit on your paid landing pages. The gap has
your gate's cost in it. What it will never show you is who.
One test for every option, SpamKill included: does a real person ever have to prove they're human — and if the tool is wrong, can you undo it?
Every filter gets it wrong sometimes. When your CAPTCHA gets it wrong, you'll see a number, never a name. When SpamKill gets it wrong, you get the lead back.
Holding a lead means storing it, so the leads we block are sealed with your key the moment we block them. Our engineers can't open them, and a stolen database contains nothing readable.
How the encryption works →Every filter makes mistakes, so we built a way to undo ours. We'd still rather be right the first time — 99.9% accurate across 100M+ submissions. Here's what that looks like on real forms.
The W3C, the body that publishes WCAG, says the task every interactive CAPTCHA depends on "inherently excludes many people with disabilities, resulting in a denial of service to these users." The people it excludes agree: in WebAIM's 2024 survey of 1,539 screen reader users, CAPTCHA ranked as the most problematic item on the web, by a notable margin.
SpamKill gives nobody anything to see, hear or solve. If we're unsure, the visitor verifies in one step, and if they skip it, the submission is held with everything they typed, for you to review. Nobody is stopped for failing a test.
No card. Month-to-month after. If the ROI isn't obvious by day 30, walk away.
All three: blocked-lead review included · 30-day free trial, no card · spam never counts against your quota · first overage free, never a forced upgrade.
Turn on held-lead review (you generate your own key at setup), and every held lead is kept for 31 days, sealed so only your password opens it.
30-day free trial, no card. By day 7 you'll have a review queue you can read: real names, real companies, and the bots that would have been on your reps' call list.