CAPTCHA and Turnstile
Verify interaction signals before submission.
Decides whether the submitted lead should enter business systems.
Regex and keyword filters
Catch exact patterns but miss rewritten or AI-generated abuse.
Understands meaning, intent, and lead quality.
Blacklists and IP blocking
Block known sources while new senders keep appearing.
Evaluates each form submission before CRM, email, or database entry.
Manual moderation
Works, but becomes slow and expensive as lead volume grows.
Allows valid leads, rejects fake leads, and keeps uncertain submissions reviewable.
Rule engines and WAFs
Protect infrastructure and known rules.
Adds semantic, business-aware lead decisioning after form submission.