Blog
Practical notes on fake signups, free trial abuse and keeping your signup flow clean.
How to stop fake signups
A layered approach to fake signups: stop simple bots on the form, check email, phone and IP in the background, and react without locking out real users.
23 October 2026 · 8 min read
How to detect users creating multiple accounts
The signals that link one person's accounts, how to store them without keeping raw personal data, and how to react without punishing real users.
22 October 2026 · 8 min read
How to block disposable emails at signup
Five practical steps to keep throwaway inboxes out of your signups, with copy-ready code, common mistakes and what a blocklist cannot tell you.
21 October 2026 · 7 min read
How to stop free trial abuse without asking for a card
What free trial abuse looks like, seven practical steps to stop it, and the mistakes that end up blocking real customers.
17 October 2026 · 8 min read
How much do fake signups cost an AI startup?
Where the cost of fake signups comes from, a simple formula to estimate it for your own product, and a calculator.
8 October 2026 · 5 min read