Best Cloud Access Security Brokers

Cloudflare operates a global network that provides content delivery, DNS, DDoS mitigation, and a web application firewall to protect and speed up websites and applications. It runs the public 1.1.1.1 DNS resolver and offers unmetered DDoS protection, SSL/TLS encryption, and bot management on every plan, including the free tier.

Beyond its core website plans, Cloudflare sells a large catalog of usage-priced developer products such as Workers, R2 storage, and Zero Trust network access. Paid plans add performance features, compliance reporting, and uptime SLAs, scaling from small sites to large enterprises with custom contracts.

Zscaler CASB secures both SaaS applications such as Microsoft 365 and Salesforce and infrastructure services such as Amazon S3, aiming to prevent the risky sharing that leads to data loss or non compliance.

Combining inline real time security with out of band scanning is the architectural point. Inline control catches activity as it happens but only sees traffic passing through it, while API based scanning reaches data already sitting in a SaaS tenant that no proxy will ever observe. Neither approach alone covers a real estate, which is why doing both under one automated policy is the meaningful claim.

Zscaler frames the problem with published figures: Gartner expects 70 percent of workloads to run in the cloud by 2028, IDC expects 175 zettabytes of data to move to the cloud, and IBM found 82 percent of breaches involved data stored in the cloud. The argument follows that legacy stacks defending networks are ineffective when cloud resources are both the greatest assets and the biggest risks.

Data protection covers accidental and risky file shares alongside insider threats such as intellectual property theft, with granular policies applied consistently across cloud applications. Threat protection remediates zero day malware using cloud sandboxing refined by 200 billion transactions and 150 million threats identified daily. The stated operational benefit is retiring costly point products and reducing IT complexity through a cloud based architecture. Pricing is not published, though Zscaler maintains a pricing and plans page.

Prisma Access delivers cloud access security broker capability as one component of a SASE platform, protecting users, applications, devices and data regardless of where they sit.

The CASB component provides deep visibility and control of all applications through SaaS Security Posture Management, combining inline and API based controls with contextual policies to protect sensitive data. Around it sit zero trust network access for least privileged application access without traditional VPN complexity, a secure web gateway using Precision AI for real time protection, remote browser isolation creating an isolation channel between users and remote browsers, and firewall as a service applying cloud native network security.

Buying these as one platform rather than five products is the actual proposition. Each function needs the same identity, device posture and traffic path, and assembling them separately means reconciling five policy models that disagree at the edges.

Palo Alto publishes unusually specific service commitments: 99.999 percent uptime SLAs, a 10 millisecond security processing SLA and a 35 millisecond SaaS performance SLA. Latency guarantees matter here because a security layer sits directly in the path of every request, so slow security gets bypassed by users. The company also claims five times faster application performance than direct to web through native application acceleration, a 50 percent reduced risk of breach, and 8.95 million new zero day threats prevented daily. Pricing is not published.

Netskope One CASB governs the use of cloud applications whether or not the organisation manages them, which is the part of the problem most tools handle badly.

Its defining choice is granularity. Rather than take a coarse grained approach by blocking services entirely, Netskope provides a deep understanding of cloud service usage and lets policies target user, application, instance, risk, activity, data and device. That distinction decides whether a security programme succeeds, because blanket blocking of a service employees need simply pushes the work onto personal accounts where nothing is visible at all.

Application risk scoring is AI driven through the Cloud Confidence Index, which extracts context from each new SaaS application whether or not it has been classified, correlating against more than 50 application attributes based on the Cloud Security Alliance Cloud Controls Matrix. The large language models answer queries in natural language and return tailored risk insights per application, which keeps pace with SaaS sprawl in a way manual review cannot.

Data loss prevention runs with contextual awareness of cloud content, covering email, chat, file sharing, web forums and screen captures, and supports file and binary fingerprinting, optical character recognition, exact data matching and machine learning image classification. Generative AI is treated as a first class surface, with inline inspection of public large language model interactions including Model Context Protocol calls. The CASB sits inside a wider platform spanning SSPM, SD-WAN, firewall as a service and advanced analytics. Pricing is not published.

Forcepoint now markets this capability as Forcepoint CASB within its Data Security Cloud platform, so anyone searching for Forcepoint ONE is looking for the cloud access security broker described here.

Its notable technical claim is breadth of integration method. Forcepoint CASB reaches over 800,000 cloud applications using a combination of API based, reverse proxy and forward proxy approaches, and that hybrid matters because each method has a blind spot the others cover. API integration reads data already at rest but cannot stop an action in flight; forward proxy routes outbound traffic through Forcepoint's proxy so policy applies before data reaches the application; reverse proxy handles agentless access from unmanaged devices.

The product scans for sensitive data at rest inside sanctioned applications and delivers visibility and control through integration with Forcepoint Data Loss Prevention, so cloud findings use the same classification rules as the rest of the estate rather than a parallel policy set.

Capabilities include shadow IT reporting and blocking, inline inspection and control, API inspection, agentless application access, and automatic detection and remediation of SaaS threats such as malware, data overexposure and policy violations. Hybrid workers get zero trust access to SaaS from any device and location. Pre built and customisable dashboards serve security, compliance and audit teams. Forcepoint has been named a Leader in the Gartner Magic Quadrant for Cloud Access Security Brokers three years running. Pricing is not published.