Multi-accounting is one person or ring creating many accounts to abuse signup bonuses, referrals, free trials, or bans. You detect it by recognising that the accounts share a device or device cluster even when emails, names, and IPs differ. cside draws on 250+ browser, device, and network signals to link accounts to the same underlying device, so it surfaces multi-accounting at signup or login without storing personal data.
How do fraud teams stop account takeover before the login completes?
cside scores the device and session the moment credentials are submitted, returning a risk signal before the login is accepted.
How do subscription businesses detect password and account sharing?
cside fingerprints each device on an account and flags when the number and pattern of devices indicates sharing, with no cookies and no login friction.
How do you stop free trial abuse without hurting real signups?
The key is telling a repeat device from a genuinely new customer at signup. cside recognises devices that already took a trial and flags only those.
Why does email verification fail to stop fake account creation?
Email verification only proves someone controls an inbox. cside closes the gap by recognising the repeated device behind bulk signups.