July 10, 202613 min read

HashiCorp Vault vs SailPoint vs Saviynt: Machine Identity vs Human Identity Governance

Sources:HashiCorp Vault documentation: secrets engines and auth methods|SailPoint Identity Security Cloud documentation|CISA: Machine Identity Management for ICS/SCADA Environments|Gartner: Managing Non-Human Identities 2025|CyberArk State of Machine Identity Security Report 2025

Eric Bang

Founder & Cybersecurity Evangelist

Non-human identity

NHI: any identity used by a workload, service, or machine rather than a human -- service account tokens, API keys, database credentials, certificates, cloud IAM roles. NHIs outnumber human identities by 45:1 in the average enterprise according to CyberArk's 2025 research

Dynamic secrets

Vault's core capability: rather than storing a static database password, Vault generates a unique, time-limited credential for each requester and revokes it automatically on expiration -- eliminating the static credential lifecycle that causes most machine identity breaches

Access certification

SailPoint and Saviynt's core governance control: periodic or event-triggered review where managers and application owners confirm that each human user's entitlements remain appropriate. Certifications apply to human access, not machine identities

Service account sprawl

the machine identity governance gap that neither Vault nor traditional IGA tools fully address: service accounts in Active Directory or Entra ID that are human-provisioned but not human-monitored -- they age, accumulate permissions, and become orphaned without triggering IGA workflows

The Two Identity Populations: Human and Machine

Every enterprise has two distinct populations of identities, each requiring different management approaches.

Human identities

Employees, contractors, and third-party users who log in with credentials tied to a person. Human identities have an HR record, a manager, a role in the organization, and defined business purpose. Access should be appropriate to job function, should change as the person moves through the organization, and should be revoked when the person leaves. The governing questions are: does this person's access match their role? Has it been reviewed recently? Are there conflicting entitlements (SoD violations)? Human identity governance is what SailPoint, Saviynt, One Identity, and Omada do.

Machine identities (non-human identities / NHI)

Service accounts, API keys, application secrets, database credentials, TLS certificates, cloud IAM roles, Kubernetes service accounts, and CI/CD pipeline tokens used by workloads and infrastructure -- not by people. Machine identities do not have an HR record or a manager. They do not appear in access certification campaigns. They have a different lifecycle: created when an application or service is deployed, modified when the application changes, revoked when the service is decommissioned. The governing questions are: does this credential have only the permissions it needs? Is it short-lived or does it need rotation? Is it tracked and audited? Machine identity management is what HashiCorp Vault, CyberArk Conjur, and Akeyless do.

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What HashiCorp Vault Actually Does

Vault is a secrets manager and machine identity platform. It does not govern human access, run certifications, or enforce SoD.

Secrets storage and dynamic generation

Vault stores encrypted secrets (static credentials, certificates, encryption keys) and generates dynamic secrets on demand. Dynamic secrets are time-limited credentials created per-request: Vault creates a unique database user with a 1-hour TTL, the application uses it, the user is automatically deleted at expiration. No static database password exists to steal. Vault's secrets engines cover databases (PostgreSQL, MySQL, MongoDB, Oracle), cloud IAM (AWS, Azure, GCP), PKI/certificates, SSH, and Kubernetes service account tokens.

Machine authentication (auth methods)

Vault authenticates machines using platform-native identity: an AWS EC2 instance proves identity via its instance metadata (AWS IAM auth method), a Kubernetes pod proves identity via its projected service account token (Kubernetes auth method), a GitLab CI job proves identity via the CI job token (JWT auth method). No shared secrets required for authentication -- the workload uses its platform identity to request secrets from Vault.

Policy-based access control

Vault policies (HCL) define which secret paths a given role can read, write, or manage. A database app might have a policy that allows reading credentials from `database/creds/app-role` but nothing else. The policy is attached to an auth method role that maps to a specific Kubernetes service account. This is granular, machine-identity-centric access control -- distinct from the RBAC and entitlement-level governance that IGA platforms provide for humans.

Audit logging

Every request to Vault is logged: which identity (machine or human) requested what secret path, at what time, with what result. Audit logs go to syslog, file, or socket. This provides the machine identity audit trail that neither Active Directory (for service accounts) nor IGA platforms provide for non-human identities.

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What SailPoint and Saviynt Actually Do

SailPoint and Saviynt are human identity governance platforms. They do not manage secrets, generate credentials, or govern machine-to-machine access.

Identity lifecycle automation

Joiner (new hire), mover (role change), and leaver (termination) workflows triggered by authoritative source events (HR system). A new employee's manager, department, and location determine which application roles are automatically provisioned. A terminated employee's accounts are automatically disabled across all connected applications within defined SLAs. This lifecycle applies to people -- not services, containers, or CI/CD pipelines.

Access certification and review

Periodic or event-triggered reviews where managers confirm that each of their direct reports has appropriate access. Application owners confirm that each user's entitlements in their application are still justified. SailPoint's Atlas AI surfaces risk signals (unused entitlements, peer group outliers, high-privilege roles) to help certifiers make better decisions. Certifications apply to human access -- they are not the right mechanism for governing service accounts or API keys, though some organizations incorrectly try to use them for this purpose.

Role management and SoD enforcement

Business role definitions, role mining (discovering natural access patterns in existing entitlements), and SoD policy enforcement that prevents conflicting entitlement combinations. SoD applies to human roles: the same person should not be able to create and approve financial transactions (purchase order creation vs approval). SoD for machine identities is a different problem: it is about least-privilege in IAM policies and secret path permissions, not role conflict between business functions.

The service account gap

SailPoint and Saviynt can onboard service accounts as managed identities and include them in access review workflows -- but doing so creates fundamental fit problems. Service accounts do not have managers to certify them in the human sense. They do not expire on human lifecycle events. Their credentials require rotation on different cadences than human password policies. IGA platforms that try to govern service accounts alongside human accounts typically produce low-quality data and certifications that rubber-stamp stale access. This is the gap that Vault, CyberArk EPM, and machine identity management platforms fill.

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The Overlap: Service Account Governance

The area where Vault and IGA platforms genuinely intersect is service account governance -- and this is where organizations feel the most confusion.

Service accounts in Active Directory

Service accounts created in Active Directory (or Entra ID) fall into a governance gray zone. They appear in IGA connector data but do not fit the joiner-mover-leaver lifecycle model. They accumulate permissions over time without triggering IGA workflows. IGA platforms can surface them in access reviews, but certifiers often lack the context to evaluate whether a service account's permissions are appropriate. The correct approach is a separate service account governance program: an inventory of all AD service accounts, their associated applications, their permission sets, and automated detection of unused or over-privileged accounts. This feeds into Vault migration (replacing static service account passwords with Vault-managed dynamic credentials) as the long-term remediation.

Non-human identity platforms (emerging category)

A category of platforms including Aembit, Clutch Security, and Entro Security is emerging specifically for non-human identity governance -- these tools discover, inventory, and provide governance workflows for machine identities (API keys, service account tokens, certificates) across the enterprise. They sit between Vault (which manages secrets for known workloads you control) and IGA (which manages human access) by addressing the machine identity discovery and governance problem that neither category fully solves. This is a signal that the boundary between machine and human identity governance is not clean at scale.

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When You Need Both -- And How They Work Together

Most enterprises at scale need both categories: IGA for human access governance and a secrets manager for machine identity. They are not substitutes.

The integrated architecture

A mature identity security architecture runs SailPoint or Saviynt for human access governance (lifecycle, certification, SoD) and HashiCorp Vault (or CyberArk Conjur, or Akeyless) for machine identity management (secrets, dynamic credentials, machine authentication). The platforms share identity context: Vault's human auth methods can use the same IdP (Okta, Entra ID) as IGA platforms, enabling unified human authentication to Vault for break-glass access scenarios. IGA platforms can onboard Vault paths as application entitlements for governance of which humans can administer Vault itself.

Priority sequencing

Organizations should not try to implement both simultaneously from scratch. The typical sequencing: (1) Deploy IGA first for human access governance -- the compliance driver (SOX, HIPAA, audit findings for orphaned accounts) usually forces this. (2) Inventory service accounts and machine identities as a parallel track. (3) Deploy Vault (or equivalent) for the highest-risk machine identities first: database credentials, cloud IAM roles, and CI/CD pipeline secrets. (4) Migrate service accounts from static AD passwords to Vault-managed dynamic credentials over a 12-24 month program.

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The bottom line

The question 'should we use Vault or SailPoint?' has a clear answer: if you have human employees whose access needs governance, you need an IGA platform. If you have applications, services, or pipelines that need credentials, you need a secrets manager. These are not competing choices -- they govern completely different identity populations using completely different security controls. The organizations that get identity security right run both, with a clear governance boundary between human access (IGA) and machine access (Vault/secrets manager), and a service account remediation program that bridges the gap.

Sources & references

HashiCorp Vault documentation: secrets engines and auth methods
SailPoint Identity Security Cloud documentation
CISA: Machine Identity Management for ICS/SCADA Environments
Gartner: Managing Non-Human Identities 2025
CyberArk State of Machine Identity Security Report 2025

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Author

Eric BangCISSP

Founder & Cybersecurity Evangelist, Decryption Digest

Cybersecurity professional with expertise in threat intelligence, vulnerability research, and enterprise security. Covers zero-days, ransomware, and nation-state operations for 50,000+ security professionals every morning.

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HashiCorp Vault vs SailPoint vs Saviynt: Machine Identity vs Human Identity Governance

The Two Identity Populations: Human and Machine

What HashiCorp Vault Actually Does

What SailPoint and Saviynt Actually Do

The Overlap: Service Account Governance

When You Need Both -- And How They Work Together

The bottom line

Sources & references

Critical CVE Reference Card 2025–2026

Ransomware Incident Response Playbook

Get threat intel before your inbox does.

Subscribe to enter the giveaway