Documented by Microsoft Defender EASM only: none.
Documented by watchTowr only: OWNED, PROVEN, CONTAINED and ROUTED.
Documented by both: FOUND.
HEAD-TO-HEAD
Microsoft Defender EASM vs watchTowr: which ASM tool takes an exposure further?
THE SHORT ANSWER
watchTowr scores higher overall on our weights, 7.25 to 4.70. Microsoft Defender EASM scores higher on Fits the enterprise stack and Buying transparency; watchTowr scores higher on Finds the unlisted estate, Proves exploitability, Contains before the patch and Closes the loop; they tie on Routes to an owner. The table below gives the reason for every score.
Microsoft Defender EASM
Rank 10 of 10
Best for: Azure-first teams that want a self-serve start and Azure billing
watchTowr
Rank 2 of 10
Best for: Teams exposed to fast-moving exploits that want edge rules pushed while patches wait
Which tool scores higher on each criterion?
| Criterion | Microsoft Defender EASM | watchTowr | Higher |
|---|---|---|---|
Finds the unlisted estate 15%WhyMicrosoft Defender EASM: A prebuilt inventory for many organizations plus recursive discovery from seeds. watchTowr: Maps the external estate including subsidiaries, brands and acquired companies, with zero install. | 7 / 10 | 8 / 10 | watchTowr |
Routes to an owner 10%WhyMicrosoft Defender EASM: Every asset carries a confidence-based state such as Approved Inventory, Candidate or Requires Investigation. watchTowr: Maps assets to subsidiaries, brands and M&A; the evidence behind each attribution is described only briefly. | 7 / 10 | 7 / 10 | Tie |
Proves exploitability 20%WhyMicrosoft Defender EASM: Dashboards cover vulnerabilities, compliance and hygiene; no exploitability testing is documented. watchTowr: Eight automated red-teaming agents, from web applications to credential stuffing and DNS, and Project Red reproduces emerging vulnerabilities to validate exposure. | 3 / 10 | 9 / 10 | watchTowr |
Contains before the patch 20%WhyMicrosoft Defender EASM: No compensating control; remediation actions are triggered downstream after export. watchTowr: Active Defense pushes ready-to-use rules to existing WAFs, firewalls, IPS and IDS, naming Cloudflare, Akamai, Imperva, F5, Fortinet, Check Point and Citrix. | 2 / 10 | 8 / 10 | watchTowr |
Closes the loop 15%WhyMicrosoft Defender EASM: Findings export to Log Analytics and Azure Data Explorer, where you build the workflow; no built-in ticketing or retest. watchTowr: Creates work in eight named ticketing tools and re-tests the hour a threat emerges; a retest after your own fix is not described separately. | 3 / 10 | 7 / 10 | watchTowr |
Fits the enterprise stack 10%WhyMicrosoft Defender EASM: Data connections to Log Analytics and Azure Data Explorer and Security Copilot in preview; no cross-tenant resource access. watchTowr: Eight ticketing and workflow connections and seven edge vendors; SIEM connections are not named on the pages reviewed. | 8 / 10 | 7 / 10 | Microsoft Defender EASM |
Buying transparency 10%WhyMicrosoft Defender EASM: Self-serve Azure billing against a published billable-asset definition after a 30-day free trial. watchTowr: No pricing published. | 7 / 10 | 2 / 10 | Microsoft Defender EASM |
Which steps does each tool document?
Microsoft Defender EASM
- FOUNDDocumented
Prebuilt inventory plus recursive discovery from seeds.
- OWNEDPartial
Confidence-based inventory states, not owner attribution.
- PROVENNot documented
No exploitability testing documented.
- CONTAINEDNot documented
No compensating control.
- ROUTEDPartial
Via export to Log Analytics and Azure Data Explorer.
- RECHECKEDNot documented
Retest after a fix not described.
watchTowr
- FOUNDDocumented
Maps the external estate including subsidiaries, brands and acquired companies.
- OWNEDDocumented
Assets mapped to subsidiaries, brands and M&A.
- PROVENDocumented
Eight red-teaming agents; Project Red reproduces new vulnerabilities.
- CONTAINEDDocumented
Active Defense pushes rules to seven named edge vendors.
- ROUTEDDocumented
Eight named ticketing and workflow tools.
- RECHECKEDPartial
Rapid Reaction re-tests when a threat emerges; a retest after your own fix is not described separately.
Partial counts as not documented for these three lines.
What do they cost?
Microsoft Defender EASM
Billed through Azure on billable assets (approved host:IP combinations, domains and IP addresses) after a 30-day free trial. The per-asset rate is on Microsoft's pricing page; it was not captured in our sources.
To start: A prebuilt inventory for many organizations, or seeds such as domains, IP blocks, hosts, email contacts, ASNs and Whois organizations.
watchTowr
Not published
To start: Zero install, per watchTowr. Required inputs are not listed on the pages reviewed.
Which should you choose?
Choose Microsoft Defender EASM if
- it matters most to you that it fits the enterprise stack (8/10)
- it matters most to you that it finds the unlisted estate (7/10)
Choose Microsoft Defender EASM if you are Azure-first and want an external inventory you can try today. Look elsewhere if you need proof, containment or a built-in fix loop.
Choose watchTowr if
- it matters most to you that it proves exploitability (9/10)
- it matters most to you that it contains before the patch (8/10)
Choose watchTowr if new exploits reach your perimeter faster than patches do and you want validation and edge rules from one service. Look elsewhere if you need a published price or detailed evidence behind every ownership decision.
Frequently asked questions
Which proves exploitability better, Microsoft Defender EASM or watchTowr?
watchTowr scores higher on our proof criterion (Microsoft Defender EASM 3/10, watchTowr 9/10). Microsoft Defender EASM: Dashboards cover vulnerabilities, compliance and hygiene; no exploitability testing is documented. watchTowr: Eight automated red-teaming agents, from web applications to credential stuffing and DNS, and Project Red reproduces emerging vulnerabilities to validate exposure.
Can Microsoft Defender EASM or watchTowr contain an exposure before the patch?
Microsoft Defender EASM: not documented on the pages reviewed watchTowr documents one: Active Defense pushes rules to seven named edge vendors. Contain scores: Microsoft Defender EASM 2/10, watchTowr 8/10.
Which is easier to buy, Microsoft Defender EASM or watchTowr?
Microsoft Defender EASM: Billed through Azure on billable assets (approved host:IP combinations, domains and IP addresses) after a 30-day free trial. The per-asset rate is on Microsoft's pricing page; it was not captured in our sources. watchTowr: Not published. Buying transparency scores: Microsoft Defender EASM 7/10, watchTowr 2/10.
Read next
- Microsoft Defender EASM profile
Scores, sources and pricing
- watchTowr profile
Scores, sources and pricing
- Beyond Microsoft Defender EASM: alternatives
Eight alternatives ranked
- Beyond watchTowr: alternatives
Eight alternatives ranked
- Line them up
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