Top Agentless Vulnerability Scanning Tools to Consider in 2025
Nowadays, most of the applications run on cloud services such as Azure, Google Cloud, and Amazon Web Services (AWS). Businesses use these cloud computing platforms to scale their applications, store data, and run analytics. These cloud platforms are more agile and reduce the dependence on physical servers and storage. As cyberattacks are increasing day by day, you need to stay one step ahead of attackers to safeguard your IT system, especially when you are using a cloud system. In the cloud, it’s really difficult to keep track of everything running in the environment, and it changes constantly. If you miss any of these changes, then it can be a serious security risk and compliance issue, which is why organizations use agent-based and agentless vulnerability scanning. Both of them have their benefits; one requires you to install software agents in your system, and another scans your cloud environment without installing anything. In this blog, we will explore agentless vulnerability scanning, its benefits, and the top agentless vulnerability scanners available in the market.
What is Agentless Vulnerability Scanning?
Agentless vulnerability scanning is a process of monitoring cloud workloads to identify vulnerabilities affecting your cloud without installing any software agents in your system. An agent is a type of software that is installed on your system. It scans, gathers information, and installs patches to mitigate vulnerabilities. But all these functions can be easily accomplished using agentless vulnerability scanners. The agentless scanners utilize a centralized API security solution that helps organizations get a complete inventory of their security posture. You can assume agentless scanning as a human spy or a CCTV camera of a cloud that monitors your every action.
How Agentless Vulnerability Scanning Works?
The push technology and centralized designs are the foundations of agentless vulnerability scanning. It helps them collect data on the system profile and posture, finding vulnerabilities across cloud networks such as containers, applications, virtual machines, appliances, etc. It is mainly accomplished by using API or cloud assets methods, which push data to a centralized remote system, allowing the security team to assess workloads through collected data. Security teams can identify blind spots and vulnerability risks by using cloud native API deployments. Most of the agentless scanning solutions use an agentless proxy that creates a secure network among cloud assets. This proxy uses native API endpoints and services, which allows them 100% visibility of all the assets across the clouds, and they can scan the assets for anomalies, misconfigurations, and performance issues regardless of physical location.
Top Agentless Vulnerability Scanning Tools
Here are the top 5 agentless vulnerability scanning tools available:
1. AutoSecT
AutoSecT is a popular AI-powered vulnerability scanning tool. It conducts real-time scanning of your cloud platforms to detect misconfigurations, insecure settings, and other vulnerabilities. It detects API vulnerabilities like SQLi, XSS, and broken authentication. With real-time validation and intelligent automation, it eliminates false positives and prioritizes true risks.
Features of AutoSecT
Automated vulnerability scanning
AI verified vulnerabilities
Password-protected reports
Multi-integration system
Centralized dashboard for vulnerability management
2. Nessus
Nessus is another popular vulnerability scanning tool that helps you identify misconfigurations, missing patches, and potential vulnerabilities in your system. Its uniqueness lies in its huge plugin library, which has thousands of plugins that update regularly and help you detect emerging threats. It also offers a clean dashboard and detailed reports for every scan with actionable insights.
Features of Nessus
Comprehensive vulnerability assessment
Detailed reporting
Integration with Tenable products
3. Qualys
Qualys offers comprehensive vulnerability management to cloud-based platforms. Its threat prioritization and remediation workflow capabilities manage risks based on their severity. Qualys is an ideal VMDR tool for large enterprises and organizations with a diverse IT environment.
Feature of Qualys
Vulnerability management
Asset management
Threat detection and prioritization
Quick response and patch deployment
4. OpenVAS
OpenVAS is a popular open source vulnerability scanner that offers robust vulnerability checks, and it is supported by a large community. If you are looking for a free and customizable scanner for your needs, then you can try OpenVAS.
Features of OpenVAS
Targeted Insights
GDPR compliant
Quick evaluations
5. ConnectSecure
ConnectSecure is a vulnerability and compliance management platform for MSPs (Managed Service Providers). It offers both vulnerability scanning and compliance management to the cloud environment, applications, and internal and external networks.
Features of ConnectSecure
Automated patching
Risk prioritization based on severity
Compliance reporting for different frameworks
Benefits of Agentless Vulnerability Scanning
Here are a few benefits of agentless vulnerability scanning:
Decrease Management Cost: Agentless scanning is cost-effective for those organizations that manage hundreds or thousands of virtual machines. It reduced management cost and reduced admin efforts, and is operationally viable.
Scalability: From a single server to large data centers, agentless scanners can detect new resources without waiting for any software installs.
Cloud Scanning Coverage: Agentless vulnerability scanning provides complete visibility to the cloud network. It offers accurate vulnerability scanning of workloads, which includes hosts, assets, connected devices, and applications.
Conclusion
Agentless vulnerability scanning is a good, viable solution for cloud native security. With the increase in cloud-based applications and dynamic infrastructures, it is one of the efficient ways to address cloud native security issues. It uses APIs to improve visibility and scans cloud workloads without degrading performance. We have shared the top five agentless vulnerability scanning tools you can pick for your needs.