Someone leaves the company on a Friday. By Monday, their email account is disabled, and their laptop is back in the pile.

What nobody checks is their login to the project management tool they signed up for in Q3, the cloud storage folder they shared with a contractor, or the CRM access they still have from two roles ago. 

Three months later, those sessions are still active.

This is how zombie accounts form. nNot through negligence, but through an offboarding process built around corporate IT assets that no longer reflects how people actually use software. 

The average company now runs more than 100 SaaS applications. Most offboarding checklists were written when there were three.

What a Zombie Account Actually Is

A zombie account is an active login that belongs to someone who no longer works for you. The name is informal. The risk is not.

What makes zombie accounts particularly dangerous is that they are valid credentials.

There is nothing to detect. The access was granted intentionally, and the system has no reason to question it. If a former employee walks back in through that door, or if their credentials are compromised after they leave, the access is there waiting.

Industry research finds that 50% of organisations have discovered former employees still accessing SaaS applications months after their departure date.

For most of those organisations, the discovery was accidental rather than the result of a deliberate audit.