10 Best Attack Surface Management (ASM) Companies in 2025

Attack Surface Management (ASM) is a proactive cybersecurity discipline that helps organizations identify, analyze, and remediate all of their internet-facing assets and potential vulnerabilities.

It goes beyond traditional vulnerability scanning to find and continuously monitor unknown or unmanaged assets, such as rogue cloud instances, misconfigured APIs, and shadow IT, that attackers use as entry points.

In 2025, with the proliferation of cloud, SaaS, and remote work, ASM is essential for getting an accurate, real-time “outside-in” view of your digital footprint.

Why ASM Is Crucial In 2025

The modern attack surface is dynamic and constantly expanding. A recent report revealed that over 70% of organizations experienced a cyberattack from an unknown or unmanaged asset.

Attackers continuously scan the entire internet for these “blind spots” which are often overlooked by internal security teams.

ASM tools are designed to proactively find these hidden exposures, provide a risk-based view of the environment, and help security teams prioritize remediation efforts based on the likelihood of a real-world breach.

How We Choose It

Our selection of the top ASM companies is based on a blend of expertise, technology, and service delivery:

Continuous Asset Discovery: We prioritized companies that provide continuous, automated discovery of both known and unknown assets.

Risk & Vulnerability Scoring: We looked for platforms that don’t just find vulnerabilities but also provide a contextual, risk-based score to help with prioritization.

Integrated Validation: We assessed companies that offer integrated capabilities like simulated attacks or penetration testing to validate exploitability.

Cloud & SaaS Visibility: We focused on providers that excel at discovering and managing assets across complex cloud and SaaS environments.

Comparison Of Key Features (2025)

1. Randori

Randori, now part of IBM Security, offers an ASM solution that provides an adversary’s perspective of your attack surface.

It continuously monitors internet-facing assets to find what an attacker sees and scores them based on their attractiveness and exploitability.

This data is then integrated into IBM Security’s broader portfolio, including QRadar SOAR, to centralize threat management and response.

Why You Want to Buy It:

Randori’s unique focus on attacker-focused reconnaissance and prioritization provides a highly accurate view of your most critical external risks.

The seamless integration with IBM’s tools streamlines workflows and accelerates response.

✅ Best For: Large enterprises using IBM’s security products who want an ASM solution that integrates deeply with their existing security operations center (SOC) and threat intelligence.

Try Randori here → Randori Official Website

2. Palo Alto Networks

Palo Alto Networks’ ASM solution, Cortex Xpanse, is a cornerstone of its Cortex platform.

It continuously scans the entire internet to discover an organization’s unknown assets, including rogue cloud instances and expired certificates.

It provides an “outside-in” view and uses machine learning to prioritize risks. Its integration with Cortex XSOAR allows for automated response to identified exposures.

Why You Want to Buy It:

Cortex Xpanse is highly scalable and effective at finding blind spots, including those from mergers and acquisitions.

Its deep integration with the Cortex platform streamlines security operations and enables automated remediation.

✅ Best For: Organizations that are already heavily invested in the Palo Alto Networks ecosystem and need an ASM solution that provides unified visibility and automated threat response across their cloud and on-premises environments.

Try Palo Alto Networks ASM here → Palo Alto Networks Cortex Xpanse Official Website

3. CyCognito

CyCognito’s ASM platform is a leader in external exposure management.

It uses AI and a proprietary reconnaissance engine to discover all of an organization’s public-facing assets and their potential vulnerabilities.

The platform maps out the most likely attack paths, providing a clear, prioritized view of the true business risk. It also performs active security testing to validate exploitability.

Why You Want to Buy It:

CyCognito’s focus on a “hacker’s perspective” ensures that it finds the most critical, exploitable vulnerabilities.

Its platform is intuitive and provides a clear, actionable roadmap for reducing your external risk.

✅ Best For: Enterprises that need a comprehensive, AI-powered platform to find and manage their entire external attack surface, including assets from third parties, subsidiaries, and M&A activities.

Try CyCognito here → CyCognito Official Website

4. Tenable

Tenable.asm is an essential component of the Tenable One Exposure Management Platform.

It provides a real-time, consolidated view of an organization’s external attack surface by continuously monitoring for changes and new assets.

It leverages Tenable’s deep vulnerability intelligence to correlate asset data with known risks, helping teams prioritize remediation efforts based on the Tenable Vulnerability Priority Rating (VPR).

Why You Want to Buy It:

Tenable.asm provides a seamless integration with Tenable.io, allowing you to manage both internal and external vulnerabilities from a single pane of glass.

Its focus on accurate asset attribution and contextual risk scoring is a key advantage.

✅ Best For: Existing Tenable customers who want to extend their vulnerability management program to include external-facing assets and gain a comprehensive view of their attack surface within a single platform.

Try Tenable.asm here → Tenable.asm Official Website

5. Qualys

Qualys ASM is a core part of the Qualys Cloud Platform, providing a centralized, continuously updated inventory of all IT assets, both on-premises and in the cloud.

It identifies unknown assets and then correlates that data with vulnerability, compliance, and threat intelligence.

It helps organizations eliminate “shadow IT” and provides a single, unified view for managing risk across their entire digital footprint.

Why You Want to Buy It:

Qualys ASM provides a highly integrated solution that leverages its existing agent and scanner infrastructure.

Its ability to correlate asset data with a wealth of vulnerability and threat intelligence makes it a powerful tool for risk-based prioritization.

✅ Best For: Organizations that are already using Qualys for vulnerability management and compliance and want to extend their visibility to their full attack surface from a single platform.

Try Qualys ASM here → Qualys ASM Official Website

6. Rapid7

Rapid7 InsightVM’s ASM capabilities provide a powerful way to discover and monitor the external attack surface.

It automatically maps out an organization’s external assets, and then uses InsightVM’s advanced analytics to prioritize vulnerabilities based on attacker activity and business context.

This provides a clear, actionable view of the most critical exposures.

Why You Want to Buy It:

Rapid7’s ASM capabilities are fully integrated into its platform, meaning you don’t have to manage another tool. It provides a highly effective, risk-based approach that helps security teams focus on what matters most.

✅ Best For: Companies that use Rapid7’s InsightVM for vulnerability management and want to seamlessly add external asset discovery and risk prioritization to their existing workflows.

Try Rapid7 InsightVM ASM here → Rapid7 InsightVM Official Website

7. Bugcrowd

Bugcrowd’s Asset Discovery is a crucial part of its crowdsourced security platform. It provides continuous External Attack Surface Management (EASM) to discover and monitor an organization’s public-facing assets.

The platform then allows you to seamlessly turn these assets into “targets” for Bugcrowd’s ethical hackers, providing a unique model that combines automated discovery with human-led validation.

Why You Want to Buy It:

Bugcrowd’s platform provides a seamless bridge between asset discovery and human-led security testing. It allows you to transform passive asset data into an active, crowdsourced defense.

✅ Best For: Organizations that want to combine automated asset discovery with a crowdsourced security program, using the platform to easily scope and launch bug bounties or penetration tests.

Try Bugcrowd Asset Discovery here → Bugcrowd Official Website

8. Bishop Fox

Bishop Fox Cosmos is a managed service that combines advanced ASM technology with expert-driven continuous penetration testing.

It focuses on finding and validating the business-impacting exposures that attackers are most likely to target.

Cosmos provides a transparent view of the attack surface and leverages Bishop Fox’s elite security experts to perform continuous, real-world attack simulations.

Why You Want to Buy It:

Bishop Fox’s reputation for elite, human-led penetration testing is a key differentiator.

Cosmos is a platform that empowers their experts, ensuring you get a high-quality, continuous assessment with minimal false positives and a focus on real-world risk.

✅ Best For: Large enterprises that need a fully managed, continuous testing service with a high level of human expertise and a focus on validating the exploitability of vulnerabilities.

Try Bishop Fox Cosmos here → Bishop Fox Cosmos Official Website

9. Intrigue

Intrigue is an open-source intelligence (OSINT)-based ASM platform designed to discover and analyze an organization’s entire external digital footprint.

The platform is designed to be highly customizable and can be used to continuously monitor for new assets, misconfigurations, and vulnerabilities.

It’s a great choice for security teams who want a powerful, flexible, and data-driven approach to ASM.

Why You Want to Buy It:

Intrigue’s focus on deep asset analysis and relationship mapping allows for the discovery of assets and exposures that other tools might miss.

It’s a versatile tool that can be used for both broad-scope discovery and targeted investigations.

✅ Best For: Security professionals and red teamers who need a highly customizable, data-driven platform to perform deep reconnaissance and continuously monitor a company’s external attack surface.

Try Intrigue here → Intrigue Official Website

10. Balbix

Balbix is an AI-native Cyber Risk and Exposure Management platform that includes robust ASM capabilities.

It uses AI to discover and continuously monitor all of an organization’s IT, OT, IoT, and cloud assets.

The platform then translates technical vulnerabilities into business risk, providing a prioritized, real-time “heat map” of your security posture.

This allows you to focus remediation efforts on the issues that pose the greatest threat to your business.

Why You Want to Buy It:

Balbix’s core strength is its AI-driven approach to Cyber Risk Quantification.

It helps you answer the question, “Where are we most likely to be breached?” and provides the data needed to make informed, risk-based decisions and communicate them to the board.

✅ Best For: Security leaders and CISOs who need a high-level, business-focused view of their cyber risk and want to use AI to automate asset discovery and risk prioritization.

Try Balbix here → Balbix Official Website

Conclusion

In 2025, a robust Attack Surface Management program is no longer a luxury but a fundamental necessity.

The companies on this list offer a range of solutions to fit different needs, from on-demand platforms to fully managed services.

For a comprehensive, AI-powered solution, CyCognito and Palo Alto Networks are top contenders.

For organizations that want to integrate ASM with their existing security tools, Tenable, Qualys, and Rapid7 offer seamless solutions.

For those seeking to leverage human expertise, Bugcrowd and Bishop Fox provide powerful, crowdsourced or expert-driven models.

Choosing the right ASM partner will help you turn your external blind spots into a strategic advantage and reduce your risk of a breach.

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