A CASB, or cloud access security broker, governs how people use cloud services and what data goes into them. A CNAPP, or cloud-native application protection platform, protects the cloud infrastructure and workloads you build and run. One watches usage of other people's apps. The other watches your own cloud estate.
Where do these terms come from?
Both are industry categories, not standards. No NIST publication defines either in the sense used by product marketing, so feature lists differ and you should evaluate by capability. What standards do give us is the underlying split of responsibility. NIST SP 800-144 describes cloud computing as displacing data and services from inside the organization to outside it, and discusses the security and privacy risks of public cloud. NIST SP 800-210 presents cloud access control characteristics and guidance for IaaS, PaaS and SaaS, noting that each service model requires managing different types of access.
That last point is the heart of the comparison. Different service models, different things to protect.
What does a CASB focus on?
Think of the user and the SaaS application. Typical questions a CASB-style control answers:
- Which cloud applications are our staff using, including ones IT never approved?
- Is sensitive data being uploaded or shared outside the company?
- Are accounts logging in from unusual places or devices?
- Do the settings in our SaaS tenants match policy?
It works mainly where people meet applications you do not run.
What does a CNAPP focus on?
Think of the workload and the cloud account. Typical questions a CNAPP-style control answers:
- Are our cloud resources misconfigured, such as public storage or over-broad roles?
- Do our container images and virtual machines contain known vulnerabilities?
- Which workloads are exposed to the internet, and which of those have the weaknesses?
- What did the code and infrastructure definitions say before they were deployed?
NIST SP 800-190 on application container security covers the container side of these concerns, from images to orchestrators to hosts.
How do the two overlap?
Both inspect cloud configuration and both care about data. The overlap is the SaaS and cloud storage settings, which some products from either category check. The difference is the point of view: the CASB starts from the user's activity and the data, the CNAPP starts from your infrastructure and code.
A constructed example
Company A is a services firm that buys most tools as SaaS and builds almost nothing. Its worry is staff pasting client files into unapproved file-sharing apps and misconfigured sharing in its collaboration suite, so user and data controls come first. Company B runs its product on containers in two cloud accounts. Its worry is a public storage bucket, an unpatched image and an over-permissioned role, so workload and configuration controls come first. A third company has both worries and prioritizes by which one could cost more this year.
How to check or apply this
- List where your data lives: SaaS tenants, cloud storage, databases, your own workloads.
- Write down the top five risks in plain words, such as "a public bucket" or "unsanctioned file sharing."
- Map each risk to the control area that addresses it, user and data or workload and configuration.
- Ask each candidate product for a feature list against your risks, not a category name.
- Check which cloud providers, SaaS tools and container platforms it supports.
- Run a pilot on one account or tenant and count the findings that matter.
- Decide who will act on the findings, since unowned alerts accumulate.
Safeguard does not offer either of these product types. Its scope is the software side of cloud-native risk, dependency and code scanning, reachability analysis and policies in the pipeline, which can complement the workload view.
Quick check
Do I need both?
Only if you have both kinds of risk. Many organizations start with the one that matches their biggest exposure.
Is a CNAPP the same as cloud security posture management?
Posture management, which checks cloud configuration, is usually one part of what vendors call a CNAPP. Ask what else is included.
Sources
- NIST SP 800-144, Guidelines on Security and Privacy in Public Cloud Computing
- NIST SP 800-210, General Access Control Guidance for Cloud Systems
- NIST SP 800-190, Application Container Security Guide
Last reviewed: 18 October 2026.
