How is this different from an EASM tool?

An EASM tool gives you a continuously updated inventory of exposed assets with risk scores. The agents build the same map and then test it. You get a ranked list of proven problems, each with a fix.

What do you need to start?

A domain. Agents discover subdomains, hosts, services, and cloud resources from there. Connecting your cloud accounts with a read-only role adds resources that are exposed but not yet tied to a name you know.

How quickly does the map update?

Discovery runs continuously. A new subdomain, an opened port, or a newly exposed cloud resource appears the day it goes live and is tested in the same cycle.

Do you find forgotten assets and shadow IT?

Yes. Staging environments, legacy hosts, acquired domains, and orphaned cloud resources are the point of an external map. Agents find whatever resolves to you and answers from the internet.

Does this cover the cloud?

Yes. Public buckets, permissive security groups, and internet-facing resources across AWS, Google Cloud, and Azure, with attack paths traced from the internet to your data and a Terraform fix for each finding.

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Everything an attackercan reach. Tested.

Agents map what you expose to the internet, keep the map current, and then attack it to show which exposures matter.

See first findings in 24 hours

24/7

continuous discovery

clouds: AWS, Google Cloud, Azure

<1%

false positives

Built by the team that secured:

[ how it works ]

How external attacksurface management works.

Discover

Agents map every host, service, endpoint, and cloud resource reachable from the internet, including the ones nobody remembers owning.

Keep it current

Discovery runs continuously. A new subdomain, an opened port, or a fresh cloud resource appears on the map the day it goes live.

Test what is exposed

Inventory is where most tools stop. Agents attack the exposed surface and show which exposures an attacker could use, with a fix for each.

[ coverage ]

The surface you know,and the surface you forgot.

An attacker's map of your organisation includes everything that answers from the internet. So does this one.

Hosts and subdomains

Every domain, subdomain, and IP that resolves to you, including staging, legacy, and acquired assets.

Exposed services

Open ports, admin panels, databases, and management interfaces that should not face the internet.

Takeover risk

Dangling DNS, orphaned cloud resources, and subdomains pointing at services you no longer control.

Cloud exposure

Public buckets, permissive security groups, and internet-facing resources across AWS, Google Cloud, and Azure.

Web apps and APIs

The applications and endpoints on the exposed surface, tested for the vulnerabilities attackers use.

Proven exposures

Each exposure that matters is exploited and reproduced. The queue is ranked by demonstrated risk.

[ compare ]

EASM tool, scanner,or Parameter.

Most external attack surface tools hand you an inventory. What happens next is the difference.

EASM tool

Vulnerability scanner

Parameter

Discovery

Continuous inventory of exposed assets.

Scans the assets you point it at.

Continuous discovery, then testing of what it finds.

Validation

None. An asset list with risk scores.

Signature matches to triage.

Exposures exploited and reproduced before they are reported.

Depth

Ports, certificates, banners.

Known CVEs and misconfigurations.

Attack paths into the apps, APIs, and cloud behind the surface.

Output

An inventory for another tool.

A dashboard of alerts.

A ranked list of proven exposures with fixes.

Discovery

EASM tool

Continuous inventory of exposed assets.

Vulnerability scanner

Scans the assets you point it at.

Parameter

Continuous discovery, then testing of what it finds.

Validation

EASM tool

None. An asset list with risk scores.

Vulnerability scanner

Signature matches to triage.

Parameter

Exposures exploited and reproduced before they are reported.

Depth

EASM tool

Ports, certificates, banners.

Vulnerability scanner

Known CVEs and misconfigurations.

Parameter

Attack paths into the apps, APIs, and cloud behind the surface.

Output

EASM tool

An inventory for another tool.

Vulnerability scanner

A dashboard of alerts.

Parameter

A ranked list of proven exposures with fixes.

[ definition ]

What is external attack surface management?

External attack surface management (EASM) is the continuous discovery of everything you expose to the internet: domains, hosts, services, cloud resources, and the apps on them. Parameter's agents build that map and keep it current. Then they attack it. The result is ranked by which exposures an attacker could exploit, each with evidence and a fix.

[ FAQ ]