The Top 9 Cloud Access Security Broker CASB Solutions

The risk is not in cloud adoption itself – it is in the lack of visibility and control over how cloud apps are used and what data flows through them. It applies an organization’s security policies to user behavior, data movement, and authentication across cloud apps and services. A CASB sits between users and cloud platforms and serves as a central policy enforcement point. A CASB addresses this gap by sitting between users and the cloud services they access. Without continuous visibility into cloud app usage, security teams cannot enforce consistent policy across their cloud footprint.

API-based CASBs deploy faster without network changes; inline proxy https://business-soulwork.com/where-to-engage-in-digital-communities-positively/ gives real-time session control but requires traffic routing changes. Understanding which SaaS, IaaS, and PaaS services your organization uses determines which CASB deployment model and integrations you need. Microsoft Defender for Cloud Apps is included with M365 E5 licensing, and several vendors offer CASB as part of broader SASE or SSE bundles.

Apps classified as risky should be disabled https://synapsewaves.com/articles/phd-cryptography-programs-guide/ or restricted. CASB tools draw on community trust ratings and vendor risk assessments to classify cloud apps consistently. Sensitive data flows across cloud services constantly. Once attackers gain access to a network, they move laterally to find sensitive data – limiting access points reduces the attack surface.

For example, a properly configured CASB can reduce the risk of shadow IT, or applications and infrastructure that are managed and utilized without the knowledge of the enterprise’s IT department. CASBs also allow organizations to detect and block unauthorized user access to cloud services and data. CASBs help organizations improve data visibility within the cloud environment through a variety of detection, monitoring, and prevention tools. A CASB supplements the organization’s existing DLP, allowing IT to apply the same principles to data in use, in motion, and at rest within a cloud environment. While traditional data protection solutions are designed to safeguard data being used on-premises, they must be adapted and expanded to protect cloud services. As companies move to a more remote and dispersed workforce and rely more heavily on cloud-based infrastructure, protecting sensitive data has become more challenging.

What is CASB in cybersecurity?

The first step in data security is restricting access to information employees do not need for their roles. A CASB applies analytics and machine learning to user behavior data to detect compromised accounts, unauthorized access, and anomalous activity. A CASB must surface user activity across all SaaS applications in use – not just the sanctioned ones. In organizations with thousands of users accessing dozens of cloud apps, visibility is the foundation of user security. It applies zero-trust principles and granular security policy across the security services it includes – combining CASB capabilities with the broader SSE security stack in a single cloud-delivered solution.

CASB benefits for businesses

Best for enterprises needing unified DLP across cloud and on-premises environments Controlling what gets shared externally is a consistent theme in positive feedback, with several customers reporting measurable reductions in unauthorized file sharing after deployment. It’s fully API-based, providing a simplified way to secure access and manage security in cloud applications without requiring agents or inline inspection. Cloud Access Security Brokers (CASBs) sit between your users and the cloud applications they access, giving your security team visibility into what cloud services are being used and control over how data flows through them. To ensure that these systems are secured and that businesses have the control and visibility over their data that they need, businesses are using Cloud Access Security Brokers (CASBs).

Why are CASBs important for businesses today?

• It enforces security policies and offers visibility into cloud application usage by managing authentication, authorization, and encryption.
• Note that Cisco put its legacy Umbrella offers end-of-sale on 30 September 2025 and now directs buyers to Cisco Secure Access, so new deployments should plan the pairing around Secure Access rather than Umbrella.
• It integrates natively with Microsoft’s own cloud suite and is designed to provide visibility into threats and user behaviors, greater control over data, and analytics to combat cyberthreats across cloud applications.
• These unauthorized assets are a threat to the environment, as they are often not properly secured — for example, they may be accessible via default passwords and configurations.
• Organizations tend to prefer this model for its minimal impact on user experience and its ability to enforce security policies and compliance without redirecting web traffic.

Originally deployed as on-premises hardware, CASBs provide visibility into an organization’s cloud services, including managed and unmanaged locations and devices. A cloud access security broker (CASB) is a security tool that intermediates between on-premises infrastructure and cloud services. In SASE architecture, a cloud access security broker is essential for extending security policies beyond the traditional perimeter to cloud applications. This includes configuring access controls to manage who can use cloud services and what data they can access.

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The always-on monitoring and quick alerting on unusual behavior get positive marks. – Integrates with 800,000+ cloud apps via API, reverse proxy, and forward proxy – Contextual risk scoring adapts controls by user, device, and activity If your organization already runs Forcepoint DLP or needs a single platform for cloud and on-premises data governance, this is a strong fit. Legacy Cisco Umbrella offers went end-of-sale on 30 September 2025, so confirm with Cisco which components are still orderable before you commit.

Should I be worried about my users using cloud applications?

They establish data loss prevention (DLP) tools and processes for data in use, in motion, or at rest from any cloud service or application to any endpoint. CASBs work to prevent the theft, loss, or leakage of data across all cloud services and applications through encryption, tokenization, and other techniques. The CASB also automates the management of data policy violations through a variety of actions, such as blocking, overriding, alerting, encrypting, or quarantining. The primary purposes of the CASB are to protect the organization’s sensitive data from theft, loss, or leakage and to provide visibility and control over an organization’s use of cloud services. These models offer enhanced threat detection, more granular policy enforcement, and the ability to protect a broader range of cloud applications, including those that are less traditional or more complex. Traditional CASBs typically focus on securing cloud services by providing visibility, data protection, and compliance enforcement through methods like API-based and proxy-based deployments.

Understanding CASB deployment models: API-based, proxy-based, and hybrid approaches

A CASB solution can be deployed either as a physical security appliance or a SaaS solution. Craig is a passionate security innovator with over 20 years of experience helping organizations to stay secure with cutting-edge information security and cybersecurity solutions. Joel is https://www.motonlegalgroup.com/tech-law/ driven to share his team’s expertise with cybersecurity leaders to help them create more secure business foundations. He’s an experienced journalist and editor with 8 years’ experience covering the cybersecurity space.

Whether you’re using public, private, or hybrid clouds, CrowdStrike Falcon® Cloud Security helps organizations achieve end-to-end security through a unified platform​. This step helps ensure that the CASB solution is compatible with the organization’s current cloud infrastructure and can be supported by the company’s existing resources. These unauthorized assets are a threat to the environment, as they are often not properly secured — for example, they may be accessible via default passwords and configurations.