How SaaS Apps Prevent
Bot Signups and Abuse

The Problem: Fake Free Trials

You offer a generous free tier. Bots sign up, mine crypto on your servers, or send spam emails using your domain reputation.

Why Captchas Aren't Enough

Captchas (like reCAPTCHA) kill conversion rates. Real users hate identifying stoplights. Plus, modern AI solvers can bypass them for $0.003 per solve.

The Invisible Layer: IP Filtering

Security-conscious SaaS companies operate in layers:

1. Layer 1 (Invisible): Check IP Reputation.
2. Layer 2 (Friction): If IP is risky, SHOW Captcha.
3. Layer 3 (Blocking): If IP is a known datacenter bot, BLOCK entirely.

This keeps the signup experience smooth for 95% of real users while stopping 99% of bots.

Identifying "Cloud" Users

Real humans don't browse from AWS, Google Cloud, or Azure IPs. If an incoming signup has an ASN belonging to a hosting provider, it is almost certainly a bot.