Introducing Abuse Detection and Prevention – Stop Fake Signups Before It Enters The Funnel

The Problem with Fake Signups

Fake and disposable signups quietly erode growth across the funnel.

• Product Teams see up to 40% of free-tier signups use disposable emails, exhausting credits and compute with zero conversion potential.
• SDRs lose 25–40% of time chasing fake or unqualified accounts instead of real prospects.
• Customer Success teams spend 6–10 hours weekly cleaning data to isolate genuine usage and engagement.
• Infrastructure cost inflates by as much as 30%, with no revenue return.

Result: Wasted spend, Distorted metrics, Slower revenue growth.

How do Teams solve it today?

Most SaaS teams still rely on manual or reactive measures to deal with fake signups — often after the damage is done.

• Product Teams: Use CAPTCHAs, double opt-ins, or domain filters to block fake users, but these reactive checks still let up to 20–25% of fake signups slip through before detection.
  
  
• Sales Teams: Manually verify new signups in CRM or enrichment tools to confirm authenticity, wasting hours each week validating fake or low-quality accounts.
  
  
• Customer Success Teams: Regularly clean user data to remove inactive or invalid accounts, an error-prone process that slows down reporting and engagement tracking.
  
  

In short: teams keep fixing the outcomes instead of preventing the cause.

How ThriveStack Solves it?

ThriveStack’s Abuse Detection & Prevention automatically detects and blocks fake or disposable signups in real time, before they enter your system.

• Detects up to 99% of fake or disposable signups instantly at registration using domain intelligence, blacklisted sources, and built-in detection rules.
  
  
• Allows teams to manually mark fake or disposable accounts, and prevents them for future signup.
• Cleanup up fake and abusive accounts to keep your Account list clean and focussed

Protects your funnel by ensuring Product, Sales, and Customer Success teams work only with verified, high-quality accounts.

1. Automatic Abuse Detection

Accounts are automatically flagged as Abuse or Fake at the time of signup. Their status, along with the reason and number of triggered rules, is visible in the Full Journey CRM under the account list.

2. Setup Abuse Prevention

For Product Teams:

• Abuse detection comes out of the box with ThriveStack’s Product Intelligence setup, by default.
• Enable Abuse Prevention by simply adding the Prevention Script to the Signup form.

3. Manual override of Account’s Abuse Status

Sales and Customer Success Teams can additionally override or update the Accounts by selecting the emails and marking them as clean/flagged if the system automatically flagged it as abuse, and vice versa.

4. Domain Whitelisting and blacklisting

Blacklist: Competition, Scammers 

Whitelist: Testing, allow specific partner domains to always come in.

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5. Real-time notifications on Abusive Signups

Customer Testimonial

“Fake signups were inflating our numbers and burning credits. After enabling ThriveStack’s Abuse Detection & Prevention, 99% of disposable emails were blocked at signup. Lead quality improved immediately and infra spend dropped within the first month.”
— Head of Growth, Mid-Market SaaS (Anonymized)

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Enable Abuse Detection & Prevention and protect your funnel from day one.

Protect your funnel. Get started now!

Availability: October 29, 2025
Now live for all Connected Revenue Intelligence users.

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FAQs

1. What is Abuse Detection & Prevention?

It’s a ThriveStack feature that automatically detects and blocks fake or disposable signups in real time — ensuring only valid users enter your product funnel.

2. Who is it for?

Designed for Product, Sales, and Customer Success teams in product-led SaaS organizations that rely on free signups or trials to drive growth.

3. How does it detect fake signups?

ThriveStack uses domain intelligence, blacklist lookups, and out-of-the-box detection rules to identify disposable or abusive emails the moment they sign up.

4. Can we mark fake signups manually?

Yes. Teams can flag any account as fake or disposable, and ThriveStack learns from it to automatically block similar signups in the future.

5. What results can teams expect?

Up to 99% of fake signups blocked, 30% reduction in infrastructure costs, and clean, reliable data across Product, Sales, and CS.

6. Does this impact legitimate users?

No. Rules are continuously optimized to prevent false positives and maintain a smooth signup experience for real users.