# Attack Surface Ranked > Editorial rankings of attack surface management (ASM) tools, scored 0-10 on seven published, weighted criteria with extra weight on what a finding arrives with and whether the tool helps you remediate. Drawn from vendor product pages, docs and public pricing. Scored September 2026; CrowdStrike EASM added 13 October 2026. ## Rankings - [Best ASM tools of 2026](https://attacksurfaceranked.com/): ranked list of 10 tools - [Score matrix](https://attacksurfaceranked.com/asm-tools): every criterion score with reasons - [How we score](https://attacksurfaceranked.com/scoring): criteria, weights, limitations ## Reviews - [IONIX](https://attacksurfaceranked.com/asm-tools/ionix) - [CyCognito](https://attacksurfaceranked.com/asm-tools/cycognito) - [watchTowr](https://attacksurfaceranked.com/asm-tools/watchtowr) - [Hadrian](https://attacksurfaceranked.com/asm-tools/hadrian) - [Cortex Xpanse](https://attacksurfaceranked.com/asm-tools/cortex-xpanse) - [Tenable Attack Surface Management](https://attacksurfaceranked.com/asm-tools/tenable-asm) - [Microsoft Defender EASM](https://attacksurfaceranked.com/asm-tools/microsoft-defender-easm) - [Rapid7 Surface Command](https://attacksurfaceranked.com/asm-tools/rapid7-surface-command) - [CrowdStrike EASM](https://attacksurfaceranked.com/asm-tools/crowdstrike-easm) - [Censys ASM](https://attacksurfaceranked.com/asm-tools/censys-asm) ## Comparisons - [IONIX vs CyCognito](https://attacksurfaceranked.com/compare/ionix-vs-cycognito) - [IONIX vs Cortex Xpanse](https://attacksurfaceranked.com/compare/ionix-vs-cortex-xpanse) - [CyCognito vs Censys ASM](https://attacksurfaceranked.com/compare/cycognito-vs-censys-asm) - [Cortex Xpanse alternatives](https://attacksurfaceranked.com/alternatives-to-cortex-xpanse) - [CyCognito alternatives](https://attacksurfaceranked.com/alternatives-to-cycognito) - [Compare tools side by side](https://attacksurfaceranked.com/compare): pick 2 to 5 tools, every score and reason - [Score calculator](https://attacksurfaceranked.com/calculator): re-weight the seven criteria - Head-to-head pages for all 45 pairs of the ten tools, listed at https://attacksurfaceranked.com/compare#all-comparisons - [IONIX alternatives](https://attacksurfaceranked.com/alternatives-to-ionix) - [watchTowr alternatives](https://attacksurfaceranked.com/alternatives-to-watchtowr) - [Hadrian alternatives](https://attacksurfaceranked.com/alternatives-to-hadrian) - [Tenable ASM alternatives](https://attacksurfaceranked.com/alternatives-to-tenable-asm) - [Microsoft Defender EASM alternatives](https://attacksurfaceranked.com/alternatives-to-microsoft-defender-easm) - [Rapid7 Surface Command alternatives](https://attacksurfaceranked.com/alternatives-to-rapid7-surface-command) - [CrowdStrike EASM alternatives](https://attacksurfaceranked.com/alternatives-to-crowdstrike-easm) - [Censys ASM alternatives](https://attacksurfaceranked.com/alternatives-to-censys-asm) ## Definitions - [What is CTEM](https://attacksurfaceranked.com/what-is/ctem) - [ASM vs EASM vs CAASM](https://attacksurfaceranked.com/what-is/asm-vs-easm-vs-caasm) - [ASM University](https://attacksurfaceranked.com/university): nine lessons in three tracks and a glossary of 43 terms - [FAQ](https://attacksurfaceranked.com/faq): 24 questions and answers - [Glossary](https://attacksurfaceranked.com/university/glossary) - [Buyer's guide for multi-subsidiary enterprises](https://attacksurfaceranked.com/buyers-guide) ## Lessons - [What is attack surface management? A plain introduction](https://attacksurfaceranked.com/university/what-is-attack-surface-management) - [How attack surface discovery works](https://attacksurfaceranked.com/university/how-asm-discovery-works) - [CVE, CVSS, EPSS and KEV explained for attack surface teams](https://attacksurfaceranked.com/university/cve-cvss-epss-kev-explained) - [What exposure validation proves](https://attacksurfaceranked.com/university/what-exposure-validation-proves) - [From finding to fix: ASM remediation](https://attacksurfaceranked.com/university/from-finding-to-fix) - [Attributing assets across subsidiaries, acquisitions and suppliers](https://attacksurfaceranked.com/university/attribution-subsidiaries-supply-chain) - [Writing attack surface management requirements from seven criteria](https://attacksurfaceranked.com/university/asm-requirements-seven-criteria) - [Running an attack surface management program](https://attacksurfaceranked.com/university/running-an-asm-program) - [Measuring an attack surface management program](https://attacksurfaceranked.com/university/measuring-an-asm-program) ## Field notes - [How to prioritize external exposures with CVSS, EPSS, KEV and exploit validation](https://attacksurfaceranked.com/field-notes/prioritize-external-exposures-cvss-epss-kev) (29 September 2026) - [CISA KEV and internet-facing assets: a working guide](https://attacksurfaceranked.com/field-notes/cisa-kev-internet-facing-assets) (29 September 2026) - [ASM vendor announcements in 2026, grouped by theme](https://attacksurfaceranked.com/field-notes/asm-vendor-announcements-2026-recap) (28 September 2026) - [The 2026 CVE surge: what 66,000 CVEs a year means for attack surface management](https://attacksurfaceranked.com/field-notes/2026-cve-surge-attack-surface-management) (21 September 2026) - [What attack surface management tools cost: what nine vendors publish](https://attacksurfaceranked.com/field-notes/asm-pricing-what-vendors-publish) (16 September 2026) - [Virtual patching with a WAF: what ASM tools can and cannot do](https://attacksurfaceranked.com/field-notes/virtual-patching-waf-asm) (10 September 2026) - [Dangling DNS and subdomain takeover: what ASM tools document](https://attacksurfaceranked.com/field-notes/dangling-dns-subdomain-takeover) (3 September 2026) - [Six attack surface management assumptions checked against vendor documentation](https://attacksurfaceranked.com/field-notes/asm-assumptions-checked) (23 June 2026) ## News - [ASM news](https://attacksurfaceranked.com/news): dated summaries of public announcements with source links, updated monthly ## Site information - [Privacy Policy](https://attacksurfaceranked.com/privacy-policy) - [Cookie Policy](https://attacksurfaceranked.com/cookie-policy) - [Terms of Use](https://attacksurfaceranked.com/terms-of-use) - [Copyright and DMCA policy](https://attacksurfaceranked.com/dmca) - [Contact](https://attacksurfaceranked.com/contact)