Microsoft Defender for Cloud Apps vs. Tenable Nessus

It is well suited if your team is working with Microsoft tools and Azure services. but if you are using other cloud service providers and don't want to spend efforts in learning integration with third-party software then this is not a great fit for you. overall we are very satisfied with the product. If your corporation with Microsoft tools then I would recommend it.

Incentivized

It is an excellent tool for scanning servers, workstations, and network devices to identify missing patches and misconfiguration; we regularly use it to confirm patch effectiveness after the update; it also helps us for preparing audits such as iso 27001, and regulatory requirements, it also helps us to identify open ports and services that violate security.

• Detect threats based on user activity logs.
• Set manual and automatic alert remediation.
• Implement activity policies.
• Detect threats based on user activity logs.

Incentivized

• Nessus is best at performing vulnerability scans, in fact, it gives findings and moreover accurate findings of the assessments. It does not do penetration testing or exploit the vulnerabilities because it is concerned about scanning the systems/applications.
• In fact, Nessus has multiple profiles/policies to perform different types of scans such as, scans oriented for PCI-DSS, malware scans, web application scans, bad shell shock detection scan to name a few.
• Nessus has the ability to classify the vulnerabilities into risk-based categories from critical to even informational which I think is one of the things that separates Nessus from other vulnerability scanners.

Incentivized

• Cloud discovery throws away found services not found in the MCAS database of SaaS apps.
• Many panes of glass required for a fully enabled implementation to administer, configure and utilize 100% of the product.
• Room for improvement in the reporting realm - not enough records are visible and exportable for high record count policy reports.

Incentivized

• The tool has lots of options for setting up before scanning any device, this methodology could be simplified further with default configuration for various devices predefined, anyhow we can use this technique by making use of policies.
• For advanced users we cannot disable the plugins inside the plugin groups, we can enable the whole set of plugins at a time, for few hundreds its ok, but thousands of plugins are of waste of resource and time.

Incentivized

Nessus is best and easy to use application for Vulnerabilities finding and reporting, it has multiple platforms and wide scope covering almost all devices for security improvement so far, thus we are very likely to continue its services.

Incentivized

The interface is pretty simple and easy to use; however, you will need to do a lot of investigative research on your own to get comfortable with it. Originally, many of the Microsoft security tools had their own seperate consoles. Overtime, they have blended into one interface which is the ideal state. In some cases it is clear Microsoft had to pick which console a certain feature or setting was going to reside in and this leads to some confusion. For example, DLP is managed through Defender for Cloud Apps but you will also need to jump into Purview. For things like reverse proxy on your M365 tenant, you will need to go into Azure and setup conditional access rules. Not a big problem and I can understand why the settings are located where they are but for someone just starting out with Defender for Cloud Apps, it will take some time to figure out.

Incentivized

Tenable Nessus is a great product and provides a lot of value, but it is difficult to set up and use and the amount of data it generates can be overwhelming. It does help us prioritize based on the severity of the detection, however there are sometimes mitigating factors that we have implemented that Nessus does not account for, which causes lots of noise in the reports.

Incentivized

I have not utilized actual support but the Sales and Product teams have been super helpful in moving our implementation forward and showing us the best practices.

Incentivized

I haven't needed to contact support yet. But issues are easily solved with a quick internet search which means support and by extension, the larger community are involved and knowledgeable.

Incentivized

Microsoft Defender for Cloud Apps was chosen primarily due to its ability to work perfectly within our mostly M365 environment. Given that this was an added feature of our E5 license, we chose to dive into it and use it due to it's good visibility into user actions and the ability to tie all M365 actions together into one place. We did not see similar visibility with other tools that we vetted

Incentivized

Sometimes when we identify a vulnerability with Nessus that has an exploit, we made a proof of concept with Metasploit in order to show to the IT managers the importance of the software/hardware hardening.

Incentivized

• Cloud App Security saves us thousands of dollars finding and rectifying apps security issues
• Identity Security Posture helps the organization identity stay in shape, saving thousands of dollars on security consultations
• The cost of suffering a breach cannot be quantified, CAS helps minimize the chances of the attackers succeeding, with excellent historical logging for most operations

Incentivized

• Nessus certainly has a positive impact while me while performing my job, either as security research, or performing vulnerability assessments for clients. It gives a lot of information about the system/application after performing scans. The number of false positives is also less compared to other vulnerability scanners.
• The professional edition is very useful as policy templates available in this edition are very handy and useful even to perform compliance scan like PCI DSS scan.
• Also, the ability to export the scan results into reports in formats like HTML, PDF is very useful which could be for performing system/application reviews.

Incentivized