Best Free Vulnerability Scanners of 2025

Enhance the security of your stack with Aikido's comprehensive code-to-cloud security solution. Quickly identify and rectify vulnerabilities with automated processes. Aikido offers a holistic approach by integrating a variety of essential scanning features. From SAST, DAST, SCA, CSPM, IaC, to container scanning and beyond, it stands out as a genuine ASPM platform.

GitGuardian is a global cybersecurity startup focusing on code security solutions for the DevOps generation. A leader in the market of secrets detection and remediation, its solutions are already used by hundred thousands developers in all industries. GitGuardian helps developers, cloud operation, security and compliance professionals secure software development, define and enforce policies consistently and globally across all their systems. GitGuardian solutions monitor public and private repositories in real-time, detect secrets and alert to allow investigation and quick remediation.

Crashtest Security, a SaaS-based security vulnerability scanner, allows agile development teams to ensure continuous security even before reaching Production. Our state-of the-art dynamic application security test (DAST), integrates seamlessly into your development environment and protects multipage and JavaScript applications, as well microservices and APIs. Crashtest Security Suite can be set up in minutes. You will also have advanced crawling options and the ability to automate your security. Crashtest Security can help you keep your code and customers safe by allowing you to see vulnerabilities in the OWASP Top 10.

Defendify is an award-winning, All-In-One Cybersecurity® SaaS platform developed specifically for organizations with growing security needs. Defendify is designed to streamline multiple layers of cybersecurity through a single platform, supported by expert guidance: ● Detection & Response: Contain cyberattacks with 24/7 active monitoring and containment by cybersecurity experts. ● Policies & Training: Promote cybersecurity awareness through ongoing phishing simulations, training and education, and reinforced security policies. ● Assessments & Testing: Uncover vulnerabilities proactively through ongoing assessments, testing, and scanning across networks, endpoints, mobile devices, email and other cloud apps. Defendify: 3 layers, 13 modules, 1 solution; one All-In-One Cybersecurity® subscription.

Haltdos ensures the 100% high availability of your website/web services by providing intelligent Web Application Firewall and application DDoS mitigation, Bot Protection, SSL offloading, Load Balancing solution over the public and private cloud that monitors, detects, and automatically mitigates a wide range of cyber-attacks including OWASP top 10 and Zero-day attacks, without requiring any human intervention.

Examine networks, servers, and websites for potential security threats. Oversee your risk management through comprehensive dashboards, detailed reporting, and timely alerts. Incorporate routine vulnerability management into your information security framework. Whenever a new port opens or a threat is identified, your team will receive automatic notifications. Eliminate unnecessary distractions by ensuring that only newly discovered or unanticipated risks trigger alerts. You can also add targets, execute scans, and obtain results using automated processes. Additionally, integrate HostedScan seamlessly into your own offerings and services for enhanced security. This approach not only streamlines risk management but also enhances overall security effectiveness.

VulnSign is an online vulnerability scan that is fully automated, configurable by customers and offers advanced features. VulnSign can scan all types of web applications, regardless of their technology. It uses a Chrome-based crawling engine to identify vulnerabilities in legacy, custom-built, modern HTML5, Web 2.0, and Single Page Applications (SPA) applications. It also offers vulnerability checks for popular frameworks. VulnSign's vulnerability scanner is easy to use. Most of the pre-scan configuration can also be automated. It's a complete vulnerability management solution that supports multiple users and integrates well with other systems. To test it, you only need to specify the URL and credentials (to scan password-protected websites) and launch a vulnerability scanner.

Cloud security best practices as an option CloudSploit is the most popular open-source security configuration monitoring tool for cloud infrastructure. Cloud security experts from all over the globe collaborated to create a repository for tests for cloud infrastructure like AWS, Azure and GitHub.

Probely is a web security scanner for agile teams. It allows continuous scanning of web applications. It also lets you manage the lifecycle of vulnerabilities found in a clean and intuitive web interface. It also contains simple instructions for fixing the vulnerabilities (including snippets code). Using its full-featured API it can be integrated into development pipelines (SDLC) or continuous integration pipelines, to automate security testing. Probely empowers developers to become more independent. This solves the security team's scaling problem that is often undersized compared to development teams. It provides developers with a tool to make security testing more efficient, which allows security teams to concentrate on more important activities. Probely covers OWASP TOP10, thousands more, and can be used for checking specific PCI-DSS and ISO27001 requirements.

It scans web sites and web apps to identify and analyze security vulnerabilities. Network Scanner identifies and assists in fixing network vulnerabilities. It analyzes the source code to identify and fix security flaws and weak points. This online tool allows you to evaluate your company's compliance with GDPR. Your employees will benefit from this unique learning opportunity and you can avoid the increasing number of phishing attacks. Consulting activity to assist companies with management, control, and risk evaluation.

The YAG Suite is a French-made innovative tool that takes SAST to the next level. YAGAAN is a combination of static analysis and machine-learning. It offers customers more than a sourcecode scanner. It also offers a smart suite to support application security audits and security and privacy through DevSecOps design processes. The YAG-Suite supports developers in understanding the vulnerability causes and consequences. It goes beyond traditional vulnerability detection. Its contextual remediation helps them to quickly fix the problem and improve their secure coding skills. YAG-Suite's unique 'code mining' allows for security investigations of unknown applications. It maps all relevant security mechanisms and provides querying capabilities to search out 0-days and other non-automatically detectable risks. PHP, Java and Python are currently supported. Next languages in roadmap are JS, C and C++.

Get a hacker’s perspective on your web apps, network, and cloud. Pentest-Tools.com helps security teams run the key steps of a penetration test, easily and without expert hacking skills. Headquartered in Europe (Bucharest, Romania), Pentest-Tools.com makes offensive cybersecurity tools and proprietary vulnerability scanner software for penetration testers and other infosec pros. Security teams use our toolkit to identify paths attackers can use to compromise your organization so you can effectively reduce your exposure to cyberattacks. > Reduce repetitive pentesting work > Write pentest reports 50% faster > Eliminate the cost of multiple scanners What sets us apart is we automatically merge results from our entire toolkit into a comprehensive report that’s ready to use – and easy to customize. From recon to exploitation, automatic reports capture all your pivotal discoveries, from attack surface exposures to big “gotcha” bugs, sneaky misconfigs, and confirmed vulnerabilities.

Offensity prioritizes continuous monitoring rather than relying solely on periodic assessments. Its automated systems consistently oversee your infrastructure and conduct tests promptly upon detecting vulnerabilities. Unlike traditional methods, Offensity's monitoring encompasses the entire organization rather than just isolated segments or specific components. This thorough scanning approach ensures that no area, regardless of how obscure or overlooked, is left unexamined. The detailed reports generated by Offensity provide technicians with a comprehensive view of existing issues along with actionable recommendations. Additionally, these insights serve as a solid foundation for effective decision-making by your management team. As a European security service, Offensity leverages extensive expertise to evaluate the security status of your organization, adhering to the most current European regulations and standards. Ultimately, this commitment to ongoing vigilance and comprehensive analysis positions Offensity as a leader in safeguarding your business against emerging threats.

MetaDefender uses a variety of market-leading technologies that protect critical IT and OT systems. It also reduces the attack surface by detecting sophisticated file-borne threats such as advanced evasive malicious code, zero-day attacks and APTs (advanced persistant threats). MetaDefender integrates seamlessly with existing cybersecurity solutions on every layer of the infrastructure of your organization. MetaDefender's flexible deployment options, tailored to your specific use case and purpose-built, ensure that files entering, being saved on, or leaving your environment are secure--from your plant floor to your cloud. This solution uses a variety of technologies to assist your organization in developing a comprehensive strategy for threat prevention. MetaDefender protects your organization from advanced cybersecurity threats that are present in data originating from various sources, including the web, email, portable devices, and endpoints.

Protecting your organisation's data and organisation is hard work. Let us help you make it easier The CyberSmart app can be easily installed and provides insight into your current security status. It scans for vulnerabilities and identifies non-conformities according to Cyber Essentials. - The operating system is current - Antivirus and firewall installed - The device has been securely configured We use technology to automate the search to find weaknesses in your system so you don't have to. Your cloud-based dashboard can be used to manage compliance within your organization. You can add new members to your team, check the compliance status for individual devices, and fix issues from within the dashboard.

StackHawk evaluates your active applications, services, and APIs for potential security flaws introduced by your team, as well as for vulnerabilities in open-source components that could be exploited. In today's engineering landscape, automated testing suites integrated within CI/CD processes have become standard practice. So, why should application security not follow suit? StackHawk is designed to identify vulnerabilities right within your development pipeline. The phrase "built for developers" embodies the core philosophy of StackHawk, emphasizing the importance of integrating security into the development process. As application security evolves to keep pace with the rapid tempo of modern engineering teams, developers require tools that enable them to assess and remediate security issues effectively. With StackHawk, security can advance in tandem with development, allowing teams to detect vulnerabilities at the stage of pull requests and implement fixes swiftly, whereas traditional security tools often lag behind, waiting for manual scans to be initiated. This tool not only meets the needs of developers but is also backed by the most widely adopted open-source security scanner available, ensuring it remains a favorite among users. Ultimately, StackHawk empowers developers to embrace security as an integral part of their workflow.

Over the past five years, there have been over 100,000 reported vulnerabilities in widely-used software applications. In just 2019, over 22,000 vulnerabilities were identified, with one-third receiving a High or Critical severity rating. To help you tackle these security challenges proactively, our free vulnerability scanning service is available to detect potential issues before they can be exploited. Our Free plan offers unlimited scans for an unrestricted number of IP addresses and URLs, allowing you to assess all your resources without hesitation. Unlike other tools that impose limitations on free trials, community editions, or free versions, you won't have to choose between scanning your web servers, Windows servers, network devices, or virtual machines. Initiate your journey toward improved vulnerability management with ease, as our solution eliminates the complexity and daunting learning curves typically associated with such tools. Our user-friendly, web-based interface enables you to effortlessly manage your security assessments, simply by entering your IP address or URL to launch a scan and accessing our portal for detailed reports and recommended security improvements. By taking advantage of our service, you can ensure that your digital assets are better protected against potential threats.

N-Stalker Web Application Security Scanner X is an advanced solution designed for assessing the security of web applications. It combines the renowned “N-Stealth HTTP Security Scanner” with a comprehensive database of 39,000 web attack signatures, along with innovative patent-pending technology focused on component-oriented security assessment. This tool is essential for developers, system and security administrators, as well as IT auditors and their teams. It offers a complete package tailored for developers and IT security professionals, featuring thorough security checks for both web applications and server infrastructures. Additionally, it serves as a valuable resource for Web Server Administrators and IT Professionals, enabling them to evaluate the security of their web server environments effectively. There is also a community edition available, which includes a limited selection of security checks for both applications and server infrastructure, making it accessible for those who may not need the full suite of features.

A vulnerability scanner designed specifically for Plesk enhances security by offering dependable configuration advice and automatic remediation for servers utilizing the Plesk control panel. Quick Patch+ evaluates your server settings and enables you to easily identify and rectify vulnerabilities through its user interface; it also supports the automation of daily fixes for all vulnerabilities or exclusively for critical ones. Additionally, it sends notifications via email and dashboard alerts for vulnerabilities that are automatically resolved, as well as for any newly identified critical issues. If your website or web application faces a security breach, it may lead to unresponsiveness, downtime, or pose risks to users. The repercussions for your business can be severe, yet for a modest monthly fee, you can safeguard your web server with a seamless and automated security solution that requires minimal intervention. This proactive approach not only ensures the integrity of your website but also fosters customer trust and confidence.

Hacker AI is an innovative system designed to analyze source code for potential security flaws that could be targeted by hackers or other malicious entities. By pinpointing these vulnerabilities, businesses can implement solutions to mitigate risks and enhance their security posture. Developed by a company in Toulouse, France, Hacker AI utilizes a GPT-3 model for its analysis. To proceed, please compress your project source files into a single Zip archive and upload it; you will receive a vulnerability detection report via email within ten minutes. Currently in its beta stage, the effectiveness of Hacker AI’s findings is limited without the expertise of a cybersecurity professional experienced in code analysis. Rest assured, we do not sell or exploit your source code for harmful intentions; it is solely employed for vulnerability detection purposes. Additionally, if needed, you may request a dedicated non-disclosure agreement (NDA) from us, as well as the option for a private instance tailored to your requirements. This ensures that your sensitive information remains confidential throughout the process.

OnSecurity is a leading penetration testing vendor based in the UK, dedicated to delivering high-impact, high-intelligence penetration testing services to businesses of all sizes. Our mission is to simplify the management and delivery of pentesting for our customers, using our platform to help them improve their security posture through expert testing, actionable insights, and unparalleled customer service. Our platform allows you to manage all of your scheduling, managing and reporting in one place, and you get more than just a test—you get a trusted partner in cybersecurity

Garak evaluates the potential failures of an LLM in undesirable ways, examining aspects such as hallucination, data leakage, prompt injection, misinformation, toxicity, jailbreaks, and various other vulnerabilities. This free tool is designed with an eagerness for development, continually seeking to enhance its functionalities for better application support. Operating as a command-line utility, Garak is compatible with both Linux and OSX systems; you can easily download it from PyPI and get started right away. The pip version of Garak receives regular updates, ensuring it remains current, while its specific dependencies recommend setting it up within its own Conda environment. To initiate a scan, Garak requires the model to be analyzed and, by default, will conduct all available probes on that model utilizing the suggested vulnerability detectors for each. During the scanning process, users will see a progress bar for every loaded probe, and upon completion, Garak will provide a detailed evaluation of each probe's findings across all detectors. This makes Garak not only a powerful tool for assessment but also a vital resource for researchers and developers aiming to enhance the safety and reliability of LLMs.

Revamp your approach to open source vulnerability and patch management using Seal Security. With seamless integration into your current software development lifecycle (SDLC) and existing workflows, Seal Security offers standalone patches for swift resolution of urgent security threats. This solution guarantees predictable remediation while optimizing resource allocation, all under centralized control that minimizes reliance on research and development teams. By streamlining your open source vulnerability remediation, you can avoid the risks associated with introducing breaking changes. Eliminate alert fatigue and embrace effective patching practices with Seal Security, ensuring that you can pass every product security scan confidently. Immediate remediation for open source vulnerabilities is at your fingertips, empowering you to meet customer service level agreements (SLAs) and deliver a vulnerability-free product that enhances customer trust and strengthens your market position. Furthermore, Seal Security effortlessly connects with a variety of programming languages, patch management systems, and open source platforms through robust APIs and CLI, making it an invaluable asset in your security strategy. Ultimately, this comprehensive solution not only safeguards your software but also elevates your commitment to security excellence.

urlscan.io offers a complimentary service for scanning and examining websites. When a user submits a URL to urlscan.io, the platform simulates a typical user's browsing experience, meticulously logging all activities generated during the navigation of that page. This encompasses the domains and IP addresses that are contacted, the types of resources requested—such as JavaScript and CSS—as well as various details regarding the page itself. Additionally, urlscan.io captures a screenshot of the website, records the DOM structure, tracks JavaScript global variables, notes any cookies established by the page, and documents a wide array of other observations. If the analyzed website is found to be targeting the users of one of the over 900 brands monitored by urlscan.io, it will be flagged as potentially harmful in the results. The aim of urlscan.io is to empower users to analyze unfamiliar and possibly dangerous websites with ease and assurance. In essence, urlscan.io serves as a valuable tool similar to a malware sandbox, enabling the analysis of suspicious URLs just as one would with dubious files. By providing these insights, urlscan.io enhances online safety and helps users make informed decisions while browsing.

Gecko revolutionizes the identification of zero-day vulnerabilities, a task once reserved for human experts. Our goal is to harness the power of automation to replicate hacker intuition and develop cutting-edge security tools. Acting as an AI-driven security engineer, Gecko identifies and resolves vulnerabilities within your codebase efficiently. It evaluates your code from a hacker's perspective, uncovering logical flaws that might be overlooked by traditional tools. All findings undergo verification in a secure sandbox environment, which significantly reduces the occurrence of false positives. Seamlessly integrating into your existing infrastructure, Gecko detects vulnerabilities in real-time as they arise. This allows you to secure your deployed code without hindering your development pace. The vulnerabilities identified are not only verified but also prioritized based on their risk level. With no unnecessary alerts, you only focus on genuine threats. Additionally, Gecko simulates targeted attack scenarios to rigorously test your code as a hacker would. This means no more wasted engineering resources and expenses on fixing vulnerabilities post-discovery. By connecting with your current SAST tools, Gecko enhances your security framework. Furthermore, our streamlined testing process can conduct thorough penetration tests in just a matter of hours, ensuring rapid and effective security assessments.