SaaS security · Comparison
CASB vs SSPM: access vs configuration
Both secure SaaS, from opposite sides. CASB governs the connection — the access and data flowing between users and cloud apps. SSPM governs the settings inside those apps — how Microsoft 365, Salesforce, or Google Workspace are configured. One watches the traffic to SaaS; the other watches the posture within SaaS.
What is Cloud Access Security Broker?
A Cloud Access Security Broker (CASB) sits between users and cloud/SaaS apps to provide visibility and control over usage: discovering shadow IT, enforcing access policy, applying inline DLP, and detecting threats in how apps are accessed and data moves.
CASB's lens is access and data in motion — who is using which app, from where, and what leaves. It's strong on shadow-IT discovery and data-exfiltration control across many apps at once.
What is SaaS Security Posture Management?
SaaS Security Posture Management (SSPM) continuously checks the security configuration inside your sanctioned SaaS apps — MFA enforcement, over-shared files, risky third-party OAuth grants, admin sprawl, and misconfigured tenant settings — against best practices and compliance.
SSPM's lens is posture at rest within each app. It's what catches the externally shared drive, the dormant admin, or the risky app integration that a CASB watching traffic wouldn't flag.
Side by side
CASB vs SSPM, compared
| CASB | SSPM | |
|---|---|---|
| Secures | Access & data flowing to SaaS | Configuration inside SaaS apps |
| Core question | How are apps being used, and is data safe in transit? | Are SaaS apps configured securely? |
| Shadow IT discovery | Yes — a primary use | No — focuses on sanctioned apps |
| Inline DLP | Yes | No — settings/posture, not traffic |
| OAuth / integration risk | Limited | Yes — risky third-party grants |
| Vantage point | Between users and apps (traffic) | Inside each app (config) |
| Best at | Usage control & data-in-motion | Misconfiguration & drift in SaaS |
Decision guide
When to choose each
Choose CASB when
- ▸You need shadow-IT discovery and control across many apps.
- ▸Data leaving to cloud apps in transit is your main concern.
- ▸You want inline enforcement between users and SaaS.
Choose SSPM when
- ▸You need to harden how M365, Salesforce, or Workspace are configured.
- ▸Over-sharing, MFA gaps, and risky OAuth grants worry you.
- ▸You want continuous posture and drift detection inside SaaS.
CASB and SSPM address complementary SaaS risks and are increasingly used together. CASB controls how apps are accessed and how data moves; SSPM ensures the apps themselves are configured securely. CASB also belongs to the broader SSE stack, while SSPM sits alongside CSPM as a posture-management discipline — one for infrastructure, one for SaaS.
Not sure which you need?
intSignal secures your SaaS estate end to end — access control and in-app posture — as part of managed cloud and secure-access services.
Frequently asked questions
What's the difference between CASB and SSPM?
CASB governs access and data flowing between users and cloud/SaaS apps — shadow IT, DLP, threat protection in transit. SSPM checks the security configuration inside SaaS apps — MFA, sharing, OAuth grants, admin settings. CASB watches the traffic to SaaS; SSPM watches the posture within it.
Do I need both CASB and SSPM?
Often yes. They cover different SaaS risks: CASB handles usage and data-in-motion (including shadow IT), while SSPM hardens the configuration inside sanctioned apps. Using both closes gaps neither covers alone.
Is SSPM the same as CSPM?
No, but they're analogous. CSPM manages posture for cloud infrastructure (IaaS/PaaS); SSPM manages posture for SaaS applications (M365, Salesforce, Workspace). Same idea — continuous configuration and compliance checks — applied to different layers.
Does a CASB check SaaS configuration?
Generally no. A CASB focuses on access and data movement between users and apps. Assessing the internal configuration of each SaaS app — sharing, MFA, integrations — is what SSPM specializes in.