List of the Top 25 Free Vulnerability Scanners in 2025

Fortify your technology stack using Aikido's comprehensive code-to-cloud security solution. Quickly identify and remediate vulnerabilities with automation. Aikido offers a unified platform that integrates a variety of essential scanning functionalities. With capabilities such as SAST, DAST, SCA, CSPM, IaC, container scanning, and beyond, it stands out as a genuine ASPM solution.

GitGuardian is a worldwide cybersecurity company dedicated to providing code security solutions tailored for the DevOps era. As a frontrunner in the realm of secrets detection and remediation, their products are employed by hundreds of thousands of developers across various sectors. GitGuardian empowers developers, cloud operations teams, and security and compliance experts to protect software development, ensuring consistent and global policy enforcement across all systems. Their solutions continuously monitor both public and private repositories in real-time, identifying secrets and issuing alerts to facilitate swift investigation and remediation efforts. Additionally, the platform streamlines the process of maintaining security protocols, making it easier for teams to manage their codebases effectively.

Crashtest Security is a SaaS security vulnerability scanner designed to help agile development teams maintain ongoing security throughout the development process, even prior to production deployment. Featuring a cutting-edge dynamic application security testing (DAST) solution, it integrates effortlessly into your development ecosystem while safeguarding multi-page and JavaScript applications, as well as microservices and APIs. Setting up the Crashtest Security Suite takes only a few minutes, and it offers advanced crawling capabilities along with the option to automate your security measures. By providing insights into vulnerabilities listed in the OWASP Top 10, Crashtest Security empowers you to protect both your code and your customers effectively. This proactive approach to security helps teams to identify and mitigate risks early in the software development lifecycle.

Defendify is a highly acclaimed, comprehensive Cybersecurity® SaaS platform tailored for organizations that are experiencing increasing security demands. This innovative platform is crafted to integrate various facets of cybersecurity into a unified solution, all backed by professional support. ● Detection & Response: Mitigate cyber threats with round-the-clock monitoring and intervention from experienced cybersecurity professionals. ● Policies & Training: Enhance cybersecurity awareness by implementing consistent phishing drills, educational training sessions, and stringent security protocols. ● Assessments & Testing: Identify and address vulnerabilities in a proactive manner through regular assessments, testing, and scanning of networks, endpoints, mobile devices, emails, and other cloud applications. Defendify offers a robust solution comprising three layers and thirteen modules within a single subscription for comprehensive cybersecurity management. Organizations can rest assured knowing they have a complete cybersecurity strategy in place, enhancing their overall resilience against potential threats.

Haltdos guarantees complete high availability for your website and web services through its advanced Web Application Firewall, application DDoS mitigation, Bot Protection, SSL offloading, and Load Balancing solutions, all deployed across both public and private cloud environments. It continuously monitors, identifies, and autonomously addresses a variety of cyber threats, including the OWASP top 10 vulnerabilities and Zero-day attacks, effectively eliminating the need for human involvement in the mitigation process. This proactive approach not only enhances security but also ensures that your online operations remain seamless and uninterrupted.

Analyze various networks, servers, and websites to identify possible security vulnerabilities. Manage risks efficiently through user-friendly dashboards, in-depth reports, and prompt alerts. Integrate regular vulnerability assessments into your cybersecurity strategy. Your team will benefit from instant notifications whenever a new port is activated or a threat is detected. Minimize distractions by configuring alerts to focus solely on newly found or unexpected risks. You can further expand your capabilities by adding targets, performing scans, and retrieving results through automated systems. Moreover, seamlessly incorporate HostedScan into your existing services to bolster security measures. This comprehensive approach not only simplifies risk management but also significantly improves the overall effectiveness of your security protocols. By continually adapting to the evolving threat landscape, your organization will be better prepared to respond to emerging challenges.

VulnSign is a fully automated online vulnerability scanning tool that allows customers to configure its advanced features according to their needs. Capable of scanning any web application irrespective of its underlying technology, VulnSign employs a Chrome-based crawling engine to detect vulnerabilities in various types of applications, including legacy systems, custom-built solutions, modern HTML5 interfaces, Web 2.0 applications, and Single Page Applications (SPA). The service also provides checks for well-known frameworks, ensuring comprehensive coverage. Designed with user-friendliness in mind, VulnSign's vulnerability scanner allows for significant automation in pre-scan configurations, simplifying the process for users. It serves as a complete vulnerability management solution, accommodating multiple users and offering seamless integration with other platforms. To initiate a scan, users simply need to input the URL and any necessary credentials for password-protected sites, making it straightforward to launch the vulnerability scanner and assess security. Additionally, VulnSign's robust capabilities make it an essential tool for organizations looking to enhance their cybersecurity posture.

One of the recommended practices for enhancing cloud security is utilizing effective monitoring tools. CloudSploit stands out as a leading open-source solution for monitoring security configurations within cloud infrastructures. This tool is the result of a collaborative effort by cloud security specialists from around the world, who have assembled a comprehensive repository of tests tailored for various cloud platforms such as AWS, Azure, and GitHub. By employing such tools, organizations can significantly improve their security posture and ensure compliance with best practices.

Probely serves as a web security scanner tailored for agile development teams, facilitating the ongoing assessment of web applications. With an intuitive web interface, it efficiently manages the lifecycle of identified vulnerabilities. Additionally, it offers straightforward guidance for remediation, including code snippets to aid developers in addressing security issues. The platform's comprehensive API enables seamless integration into software development life cycles (SDLC) or continuous integration workflows, thereby automating security testing processes. By empowering developers to handle security independently, Probely addresses the common challenge of security teams being outnumbered by development personnel. This approach enhances the efficiency of security testing, allowing security teams to focus on higher-priority tasks that require their expertise. In addition to covering the OWASP Top 10 vulnerabilities, Probely also addresses thousands of others and is equipped to validate specific PCI-DSS and ISO27001 compliance requirements, ensuring a robust security posture for web applications. Ultimately, by streamlining the security assessment process, Probely fosters a culture of security awareness and accountability within development teams.

It examines websites and web applications to detect and assess security weaknesses. The Network Scanner plays a crucial role in identifying and helping to remediate vulnerabilities within the network. By scrutinizing the source code, it uncovers security issues and vulnerabilities that need attention. This online platform enables you to assess your organization's adherence to GDPR requirements. Your workforce will gain valuable insights from this distinctive educational opportunity, which also helps mitigate the rising threat of phishing attacks. Additionally, it offers consulting services to support companies in management, risk assessment, and control measures, enhancing their overall security posture. By incorporating these practices, businesses can not only protect their assets but also foster a culture of security awareness among employees.

The YAG Suite represents a groundbreaking French tool that elevates SAST capabilities significantly. YAGAAN merges static analysis with machine learning, providing clients with much more than a mere source code scanner. This comprehensive suite enhances application security audits and integrates security and privacy within DevSecOps design processes. By aiding developers in grasping the causes and implications of vulnerabilities, the YAG Suite transcends standard vulnerability detection methods. Its contextual remediation feature enables developers to swiftly address issues while also enhancing their secure coding practices. Additionally, YAG Suite’s innovative 'code mining' technique facilitates security assessments of unfamiliar applications, effectively mapping all pertinent security mechanisms and offering querying features to identify 0-day vulnerabilities and other risks that cannot be automatically detected. Currently, it supports programming languages such as PHP, Java, and Python, with plans to expand to JavaScript, C, and C++ in the future. This forward-thinking approach ensures that developers are well-equipped to tackle emerging security challenges.

Gain insights from a hacker's viewpoint on your web applications, network infrastructure, and cloud services. Pentest-Tools.com empowers security teams to effortlessly conduct the essential phases of a penetration test, even without extensive hacking expertise. Located in Bucharest, Romania, Pentest-Tools.com specializes in developing offensive cybersecurity solutions and exclusive vulnerability scanning software tailored for penetration testers and information security professionals. Our suite of tools enables security teams to pinpoint potential attack vectors that adversaries might exploit to infiltrate your organization, allowing you to significantly mitigate the risks associated with cyber threats. > Streamline repetitive pentesting tasks > Accelerate pentest report creation by 50% > Avoid the expenses of utilizing multiple scanning tools What distinguishes us is our capability to automatically consolidate findings from our complete toolkit into a thorough report that is not only ready for immediate use but also easily customizable to meet your needs. From initial reconnaissance to exploitation, our automated reports encapsulate all critical findings, including vulnerabilities in the attack surface, significant “gotcha” issues, subtle misconfigurations, and confirmed security weaknesses, ensuring that you have a comprehensive understanding of your security posture and areas for improvement.

Offensity emphasizes the importance of continuous surveillance rather than depending only on occasional evaluations. Its automated systems are always monitoring your infrastructure and initiate tests immediately upon identifying vulnerabilities. In contrast to conventional approaches, Offensity's oversight covers the entire organization, ensuring that no part is left unexamined, even those that are often overlooked. This thorough examination guarantees that every corner of your operation is scrutinized. The in-depth reports produced by Offensity offer technicians a complete understanding of current problems while providing actionable recommendations for improvement. Furthermore, these insights lay a strong groundwork for informed decision-making by your management team. As a European security provider, Offensity draws on a wealth of experience to assess your organization's security posture in compliance with the latest European regulations and standards. This unwavering dedication to continuous vigilance and meticulous evaluation places Offensity at the forefront of protecting your business against new threats. By maintaining this proactive approach, Offensity ensures that your security measures evolve in tandem with the dynamic landscape of cyber risks.

MetaDefender employs an array of top-tier technologies designed to safeguard essential IT and OT systems effectively. By identifying complex file-based threats like advanced evasive malware, zero-day vulnerabilities, and APTs (advanced persistent threats), it significantly minimizes the attack surface. This robust solution integrates effortlessly with the cybersecurity frameworks already in place throughout your organization’s infrastructure. With flexible deployment options customized to match your specific needs, MetaDefender guarantees the security of files as they enter, are stored, or exit your environment, covering everything from the plant floor to the cloud. In addition to providing protection, this solution aids your organization in formulating a thorough strategy for threat prevention. Furthermore, MetaDefender offers comprehensive protection against sophisticated cybersecurity threats that may arise from diverse sources, such as the internet, email communications, portable devices, and endpoints, ensuring a multi-layered defense.

Safeguarding your organization's data and overall security can be quite challenging, but we are here to simplify the process for you. The CyberSmart application offers a straightforward installation and delivers valuable insights into your existing security posture by scanning for weaknesses and pinpointing areas that do not meet Cyber Essentials standards. - Your operating system is updated - Antivirus software and firewall protection are in place - The device is configured with security best practices We leverage advanced technology to automate the identification of vulnerabilities in your system, relieving you of this burden. Additionally, your cloud-based dashboard allows for effective management of compliance throughout your organization, enabling you to invite new team members, monitor the compliance status of each device, and resolve issues directly from the dashboard, thus streamlining your security efforts.

StackHawk inspects your ongoing applications, services, and APIs for potential security issues that may arise from your development team, along with vulnerabilities in open-source components that could be at risk of exploitation. In the current engineering environment, it has become commonplace to integrate automated testing suites within CI/CD frameworks. Therefore, it begs the question: why shouldn't application security adapt in a similar manner? StackHawk is tailored to uncover vulnerabilities directly within your development workflow. The motto "built for developers" captures the essence of StackHawk, highlighting the need to weave security seamlessly into the development lifecycle. As the landscape of application security progresses to match the fast pace of contemporary engineering teams, it is crucial for developers to have access to tools that facilitate the assessment and resolution of security vulnerabilities. With StackHawk, security measures can evolve alongside development efforts, enabling teams to identify vulnerabilities during pull requests and address them promptly, in contrast to traditional security solutions that often delay action until after manual scans are performed. This tool not only fulfills the requirements of developers but is also supported by the most widely utilized open-source security scanner, making it a preferred choice among users. Ultimately, StackHawk empowers developers to fully integrate security into their routine tasks, fostering a culture of proactive risk management within their projects. Additionally, this allows organizations to enhance their overall security posture while maintaining efficiency in their development processes.

In the last five years, there have been more than 100,000 documented vulnerabilities in popular software applications. During 2019 alone, over 22,000 vulnerabilities were uncovered, with approximately one-third classified as having High or Critical severity. To address these security risks effectively, we offer a complimentary vulnerability scanning service that identifies potential threats before they can be exploited. Our Free plan allows for unlimited scans across an unlimited number of IP addresses and URLs, enabling you to evaluate all your resources without any constraints. Unlike many other tools that limit access through free trials or community editions, our service allows comprehensive scanning of your web servers, Windows servers, network devices, or virtual machines without compromise. Begin your path to enhanced vulnerability management easily, as our solution simplifies the process, removing the complexities and steep learning curves often associated with such tools. With our intuitive, web-based platform, you can seamlessly manage your security evaluations by simply entering your IP address or URL to initiate a scan and obtain detailed reports along with suggested security enhancements. By utilizing our service, you can significantly strengthen the protection of your digital assets against emerging threats. This proactive approach to identifying vulnerabilities ensures that you stay ahead in the ever-evolving landscape of cybersecurity challenges.

N-Stalker Web Application Security Scanner X is a sophisticated tool tailored for evaluating the security measures of web applications. By integrating the well-known “N-Stealth HTTP Security Scanner” with an extensive repository of 39,000 web attack signatures, it utilizes cutting-edge, patent-pending technology that emphasizes component-oriented security evaluation. This solution is indispensable for developers, system and security administrators, as well as IT auditors and their teams. It provides an all-inclusive package specifically designed for developers and IT security experts, offering meticulous security assessments for both web applications and server infrastructures. Furthermore, it is an excellent asset for Web Server Administrators and IT professionals, allowing them to effectively analyze the security of their web server environments. There is also a community edition available, which presents a limited range of security checks for applications and server infrastructures, ensuring accessibility for users who may not require the comprehensive feature set. This versatility makes it a valuable starting point for those new to web application security assessment.

A vulnerability scanner tailored for Plesk significantly bolsters security by providing reliable configuration recommendations and automated fixes for servers that operate on the Plesk control panel. Quick Patch+ assesses your server configurations, allowing you to swiftly spot and resolve vulnerabilities through an intuitive user interface; furthermore, it facilitates the automation of daily patches for all issues or specifically for those deemed critical. The system also offers email notifications and dashboard alerts regarding vulnerabilities that have been automatically addressed, as well as updates on any newly discovered critical threats. In the event that your website or web application experiences a security breach, it could result in unresponsiveness, downtime, or potential risks for your users, which could lead to significant consequences for your business. Fortunately, for a reasonable monthly fee, you can protect your web server with a streamlined and automated security solution that demands minimal effort from you. Adopting this proactive strategy not only secures the integrity of your website but also builds customer trust and confidence, making it an essential investment for any online presence. Ultimately, investing in such a security measure can save your business from costly repercussions in the long run.

Hacker AI represents a cutting-edge solution aimed at examining source code for possible security weaknesses that could be exploited by hackers or other unscrupulous individuals. By identifying these vulnerabilities, organizations can take proactive measures to reduce risks and bolster their overall security framework. This system, created by a firm based in Toulouse, France, leverages a GPT-3 model to conduct its assessments. To utilize the service, simply compress your project source files into a single Zip archive and upload it; in return, you will receive a vulnerability detection report via email within approximately ten minutes. Currently in the beta phase, the accuracy of Hacker AI’s results may be limited without the guidance of a cybersecurity expert skilled in code analysis. We cannot emphasize enough that we do not sell or misuse your source code for any malicious purposes; it is strictly utilized for the purpose of identifying vulnerabilities. Furthermore, if necessary, you can request a dedicated non-disclosure agreement (NDA) from us, along with the availability of a private instance tailored to your specific needs. This approach guarantees that your sensitive information remains protected and confidential throughout the entire process. By choosing Hacker AI, you are prioritizing the security of your code and the integrity of your business.

OnSecurity stands out as a prominent penetration testing provider located in the UK, committed to offering potent and insightful pentesting solutions for organizations of various scales. We aim to streamline the process of managing and executing penetration tests for our clients, utilizing our innovative platform to enhance their security frameworks through specialized assessments, practical recommendations, and exceptional customer support. With our platform, you can oversee all aspects of scheduling, management, and reporting seamlessly in one integrated space, ensuring that you receive not just a testing service, but also a reliable ally in fortifying your cybersecurity defenses. In doing so, we empower businesses to proactively address vulnerabilities and stay ahead of potential threats.

Garak assesses the possible shortcomings of an LLM in various negative scenarios, focusing on issues such as hallucination, data leakage, prompt injection, misinformation, toxicity, jailbreaks, and other potential weaknesses. This tool, which is freely available, is built with a commitment to ongoing development, always striving to improve its features for enhanced application support. Functioning as a command-line utility, Garak is suitable for both Linux and OSX users and can be effortlessly downloaded from PyPI for immediate use. The pip version of Garak undergoes frequent updates to maintain its relevance, and it is advisable to install it within its own Conda environment due to specific dependencies. To commence a scan, users must specify the model that requires analysis; Garak will, by default, run all applicable probes on that model using the recommended vulnerability detectors for each type. As the scanning progresses, users will observe a progress bar for each probe loaded, and once completed, Garak will deliver a comprehensive report detailing the results from every probe across all detectors. This functionality makes Garak an essential tool not only for assessment but also as a crucial asset for researchers and developers who seek to improve the safety and dependability of LLMs in their projects. Additionally, Garak's user-friendly interface ensures that even those less experienced can navigate its features with ease, further broadening its accessibility and impact within the field.

Transform your strategy for managing open source vulnerabilities and patches with Seal Security. This innovative tool integrates smoothly into your existing software development lifecycle (SDLC) and workflows, providing independent patches that enable quick action against critical security threats. Seal Security ensures consistent remediation while enhancing the use of resources, all managed centrally to reduce dependence on research and development teams. By simplifying the process of addressing open source vulnerabilities, you can mitigate the dangers associated with implementing disruptive changes. Say goodbye to alert fatigue and adopt robust patching methods with Seal Security, allowing you to confidently pass every product security scan. With prompt remediation of open source vulnerabilities at your disposal, you can fulfill customer service level agreements (SLAs) and deliver a product free of vulnerabilities, thereby boosting customer trust and fortifying your competitive edge in the market. Additionally, Seal Security connects seamlessly with various programming languages, patch management systems, and open source platforms through its powerful APIs and CLI, making it an essential component of your security framework. Ultimately, this all-encompassing solution not only protects your software but also enhances your dedication to achieving security excellence, promoting a culture of continuous improvement in your organization.

urlscan.io provides a free service for scanning and analyzing websites. Upon submitting a URL, the platform mimics a regular user's browsing session, thoroughly documenting all activities that occur during the interaction with the site. This includes recording the domains and IP addresses accessed, the types of resources requested—like JavaScript and CSS—and various characteristics of the webpage itself. Furthermore, urlscan.io takes a screenshot of the site, captures the DOM structure, monitors JavaScript global variables, logs any cookies set by the page, and compiles a comprehensive list of other relevant observations. Should the examined site be linked to any of the more than 900 brands that urlscan.io tracks, it will be marked as potentially harmful in the analysis results. The primary goal of urlscan.io is to enable users to assess unfamiliar and possibly hazardous websites with confidence and ease. Essentially, urlscan.io acts as an effective tool akin to a malware sandbox, allowing users to scrutinize suspicious URLs much like they would dubious files. By delivering these critical insights, urlscan.io significantly boosts online security, assisting users in making well-informed choices while surfing the web. This service not only enhances individual safety but also contributes to a more secure internet environment overall.

Gecko is transforming the way zero-day vulnerabilities are identified, a process that was previously the domain of skilled professionals. Our mission is to leverage automation to mimic the instincts of hackers while creating innovative security solutions. Functioning as an AI-enhanced security engineer, Gecko effectively discovers and addresses vulnerabilities in your codebase. It assesses your code from a hacker’s viewpoint, revealing logical errors that conventional tools may miss. Every finding is validated within a secure sandbox environment, which significantly minimizes the risk of false positives. Gecko integrates effortlessly into your current infrastructure, enabling real-time detection of vulnerabilities as they emerge. This capability allows you to fortify your deployed code without slowing down the development process. The vulnerabilities identified are not only confirmed but are also ranked according to their risk level, ensuring that you concentrate solely on legitimate threats without unnecessary alerts. Moreover, Gecko simulates specific attack scenarios to rigorously evaluate your code in a manner akin to that of a hacker. This approach eliminates the inefficiencies and costs associated with remedying vulnerabilities after they have been discovered. By linking with your existing SAST tools, Gecko bolsters your overall security framework. In addition, our efficient testing methodology can perform comprehensive penetration tests in just a few hours, guaranteeing prompt and effective security evaluations. Ultimately, Gecko empowers your team to stay one step ahead in the ever-evolving landscape of cybersecurity.