Service Account vs Agent Identity
Service accounts are shared org-level principals for machines; agent identities are per-agent principals with delegation, email, and revocation built in. They solve different problems — agents need the second kind.
What a service account actually is
A service account is a credentialed principal that belongs to an organization or team, not to an individual. It typically has an email-ish identifier (sales-bot@yourcompany.com), a password or API key, and a set of scoped permissions. Multiple humans and machines may share it. It's designed for long-lived automation — nightly jobs, CI pipelines, a daemon running in a container — where the owner is 'the ops team' rather than any specific person.
Service accounts are the oldest form of non-human identity and every major platform has them: Google Workspace, Microsoft 365, AWS, Kubernetes. They work well when the thing using the account is static, well-scoped, and supervised by a team that can rotate credentials on a schedule.
Why service accounts fit AI agents poorly
AI agents violate the assumptions service accounts depend on. Agents proliferate — one human developer spins up five agents in an afternoon. Service accounts presume governance; agents presume experimentation. When the ops team has to approve every new service account, agents get retrofitted onto existing shared accounts, which destroys attribution: logs say 'sales-bot did it' without telling you which of the five agents wearing the sales-bot hat did it.
Second problem: service accounts are typically shared. Two agents using the same service account can see each other's data, read each other's mail, rotate each other's credentials. The blast radius of any single agent compromise is every other agent on the same account. Agent identities avoid this by giving each agent its own principal.
The defining differences
An agent identity is per-agent, not per-team. It has a real mailbox it can send and receive from under its own address, not an alias that forwards to a human. It has a vault scoped just to it, not a shared secrets store. It records a delegation chain back to the human who authorized it, so revocation of the human cascades to the agent. None of these are typical of service accounts — you can bolt pieces on with extra tooling, but the defaults are wrong.
The practical rule of thumb: if the thing you're authenticating is long-lived, shared, and operated by a team, use a service account. If it's per-instance, autonomous, and traceable to one human, use an agent identity. Most AI agents fall in the second bucket whether their builders realize it or not.
How Loomal positions versus service accounts
Loomal identities are agent-first: each one has its own mailbox, its own vault, its own TOTP store, its own delegation chain. You can think of them as 'service accounts, if service accounts had been designed for AI agents instead of nightly cron jobs.' The primitives are the same shape (credentials, permissions, an address to reach them at); the defaults are different.
For legacy automation where a traditional service account is the right answer, keep using it. Loomal doesn't replace IAM or Google Workspace. It fills the gap for the one NHI subtype — autonomous, per-agent, traceable — that service-account tooling was never built for.
Loomal primitives
identity.whoamivault.getidentity.signSee it in production
More from the glossary
Agent 2FA (TOTP)
Time-based one-time password generation that lets an AI agent complete two-factor authentication on services that require it — without borrowing a human's phone or authenticator app.
Agent Email
A routable email address that belongs to an AI agent — not a forwarding alias, not a shared team inbox, but a first-class mailbox the agent sends from and receives into on its own.
Agent Vault
An encrypted credential store scoped to a single AI agent identity, holding API keys, OAuth tokens, and secrets the agent uses to authenticate with other services.
Agent-to-Agent Email
Using standard SMTP email as the transport between AI agents — one agent sends a message to another agent's mailbox, and the recipient reads and acts on it. The simplest interoperable A2A protocol that already exists.
Build agents with their own identity.
Email, vault, and TOTP — provisioned in 30 seconds.
Get API Key — FreeLast updated: 2026-04-14