What’s IAM?
Identity and access management (IAM) is your gatekeeper. It manages who can access your systems, what they can access once they're in, and how you monitor what they're doing while they're there.
Every time a user signs in, your IAM tools verify their identity and decide whether to grant access. In practice, IAM:
Creates and manages accounts for employees, contractors, partners, and service accounts across apps and systems.
Authenticates users (Who are you?) using passwords, MFA, and other methods.
Authorizes actions (What are you allowed to do?) based on roles, groups, or attributes.
Logs and monitors access so you can spot unusual behavior and support audits.
Modern IAM platforms also bundle key capabilities like:
Single sign-on (SSO): one login that gives users access to many apps, instead of separate passwords for each.
Multi-factor authentication (MFA): a second proof of identity (like a code or security key) to make stolen passwords much harder to abuse.
Automated provisioning and deprovisioning: creating, updating, and removing accounts when people join, move roles, or leave.
Put simply, IAM answers "Does this person have permission to be here right now?"