Trueguard

Your free tier is a honeypot for professional abusers. Right now, there are organized operations running scripts against your signup endpoint at scale. Not curious hackers or casual freeloaders. Professional syndicates with rotating proxies, disposable identities, and custom automation built specifically to farm your free credits. The economics are brutal. Disposable emails cost fractions of a cent or is free in some cases. Residential proxy pools run about $50 a month. Your free tier offers $5-50 worth of compute or API calls per account. That arbitrage funds entire grey market businesses reselling API access, mining crypto on your infrastructure, or burning through millions of AI tokens across hundreds of fake accounts. Here's the pattern most founders miss: weekend signup spikes from data center IPs using randomized but plausible email patterns. Real domains, not obvious disposables. Clean device fingerprints because they're running actual Chrome instances via automation frameworks. They solve your CAPTCHAs through services at $0.0005 per solve. What actually works is correlation across signals. Email entropy score plus device persistence plus network reputation plus signup timing cadence. When those four vectors align in specific combinations, you're not seeing power users testing your product. You're seeing an operation harvesting your margin. If your free tier saw 500 signups last week and you can't name three of those users, you've got a problem. Start tracking what percentage of your infrastructure spend goes to accounts that never convert, never engage, and never come back after exhausting their credits. That number is your abuse tax. And it's probably higher than you think.

You know that blocklist you’re maintaining? The one with 100,000+ disposable email domains that you update every week? It’s already outdated. New disposable domains spin up hourly. Gmail aliases multiply infinitely with dots and plus signs. And meanwhile, you just blocked three legitimate users because their company email happened to match a pattern you flagged last month. Static lists can’t win this game. Here’s what actually works: pattern recognition over memorization. Check domain age (most new disposable domains are under 90 days old). Inspect MX records (throwaway services rarely configure proper mail servers) and often are missing A records. Look at the email’s behavior in context with device signals and network data. Want something you can ship today? Start with domain age checks. If an email’s domain was registered in the last week and the user is connecting through a VPN, that’s not a coincidence worth ignoring. We built Trueguard because we got tired of watching companies play whack-a-mole with blocklists while fraudsters spun up domain number 100,001.

We analyzed over 1.5 million emails sent to disposable addresses from 46,000 domains to uncover how temporary inboxes enable free trials, refund scams, multi-account activity, and create security risks. The findings highlight why understanding disposable email behavior is essential for preventing online fraud and abuse. https://lnkd.in/d6FSEvS6

Trueguard V2 is here! Better than ever, with new features and a refreshed design. What’s new: 🫆 Browser & Network Fingerprinting 🧠 Enhanced IP Intelligence 🌍 Geolocation Tracking ⚙️ Custom Rules 🤖 Bot Detection With V2, Trueguard helps you detect risks earlier, stop fraud faster, and understand your users better. Try it out now!