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Government · head to head

NEXGEN Asset Management vs Tenable Nessus

NEXGEN Asset Management logo

NEXGEN Asset Management

Government

Combined EAM and CMMS for utilities and municipalities with Esri GIS at the centre of the asset register

From
On request
Free plan
No
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only Tenable Nessus has a free tier, so it costs nothing to try first.
  • Each has a real cost: NEXGEN Asset Management pricing keys off asset count, so a routine GIS resegmentation that splits mains into more records can raise your subscription without adding a single user or work order.; Tenable Nessus nessus Professional is $4,790 for one year, sold as an annual licence rather than a per scan or usage based fee
  • They diverge on capability: NEXGEN Asset Management covers Esri GIS integration, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which NEXGEN Asset Management and Tenable Nessus actually diverge.

Attributes where NEXGEN Asset Management and Tenable Nessus differ
AttributeNEXGEN Asset ManagementTenable Nessus
Starting priceOn requestFree
Pricing modelquotesubscription
Free tierNoYes
PlatformsWeb, iOS, AndroidWindows, Linux, Macos, Cloud
CategoryGovernmentCybersecurity
FoundedUnknown2002

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in NEXGEN Asset Management

  • Esri GIS integration
  • Risk and criticality
  • Condition assessment
  • Capital planning
  • Work orders
  • Mobile field app
  • Service requests
  • Inventory and purchasing

Only in Tenable Nessus

  • Network scanning
  • Vulnerability detection
  • Configuration assessment
  • Malware detection
  • Compliance checking
  • Cloud security assessment
  • Mobile scanning
  • API access

What people use each for

The jobs each tool is most often brought in to do.

NEXGEN Asset Management

  • A water utility that must show a board why a specific main is being replaced this year rather than nextnot Tenable Nessus
  • A city public works department consolidating a GIS asset inventory and a paper work order process into one systemnot Tenable Nessus
  • An airport authority tracking condition assessments across airside and landside assets with capital forecastingnot Tenable Nessus
  • A district that needs citizen service requests to become tracked work orders with an auditable historynot Tenable Nessus

Tenable Nessus

  • Vulnerability scanning of servers, network devices and web applicationsnot NEXGEN Asset Management
  • Configuration and compliance auditing against hardening benchmarksnot NEXGEN Asset Management
  • Point in time assessments by consultants and penetration testersnot NEXGEN Asset Management

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

NEXGEN Asset Management

  • Pricing keys off asset count, so a routine GIS resegmentation that splits mains into more records can raise your subscription without adding a single user or work order.
  • Nothing is published and the vendor is small, so the reference set you can call is limited and mostly Californian and North American public agencies.
  • The interface is dated compared with modern CMMS products, which hurts adoption among field crews who compare it to consumer apps on their own phones.
  • GIS integration is the product strength and also its dependency; agencies without a maintained ArcGIS asset layer face a data preparation project before NEXGEN is useful.
  • As a small vendor it carries acquisition risk, and in this segment acquisitions have repeatedly meant a product frozen while it is folded into a larger portfolio.

Tenable Nessus

  • Nessus Professional is $4,790 for one year, sold as an annual licence rather than a per scan or usage based fee
  • Support beyond the base entitlement costs an extra $400 per year for Advanced Support with 24x365 phone and chat access
  • The on demand training course is a separate $275 purchase for a single person for one year
  • Multi year discounts require paying for two or three years up front

Pricing, plan by plan

NEXGEN Asset Management

On request
  • NEXGEN Asset Management$undefined/year
    • Tiered pricing based on the number of assets under management
    • Implementation, GIS integration and data migration quoted separately
    • Mobile module licensed alongside the core platform

Tenable Nessus

Free
  • Nessus EssentialsFree
    • Up to 16 ips
    • Network scanning
    • Vulnerability assessment
  • Nessus Professional$2600/year
    • Unlimited targets
    • Enterprise features
    • Advanced analytics
  • Nessus Expert$5200/year
    • All Professional features
    • Cloud integration
    • Advanced reporting

Which should you pick?

Choose NEXGEN Asset Management if

  • You need esri gis integration.
  • You work on Web, iOS, Android.
  • You also want risk and criticality.
NEXGEN Asset Management review

Choose Tenable Nessus if

  • You need network scanning.
  • You want to start without paying.
  • You work on Windows, Linux, Macos, Cloud.
  • You also want vulnerability detection.
Tenable Nessus review

Questions people ask

Is NEXGEN Asset Management or Tenable Nessus better?
Neither clearly leads. NEXGEN Asset Management starts at On request and Tenable Nessus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, NEXGEN Asset Management or Tenable Nessus?
Tenable Nessus has a free tier; the other does not. Paid plans start at On request for NEXGEN Asset Management and Free for Tenable Nessus.
Does NEXGEN Asset Management or Tenable Nessus run on more platforms?
NEXGEN Asset Management runs on Web, iOS, Android. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use Tenable Nessus for free?
Yes. Tenable Nessus has a free tier, so you can try it without paying. NEXGEN Asset Management starts at On request.
What is NEXGEN Asset Management best used for?
NEXGEN Asset Management is most often used for a water utility that must show a board why a specific main is being replaced this year rather than next, a city public works department consolidating a gis asset inventory and a paper work order process into one system, an airport authority tracking condition assessments across airside and landside assets with capital forecasting, a district that needs citizen service requests to become tracked work orders with an auditable history. Of those, a water utility that must show a board why a specific main is being replaced this year rather than next and a city public works department consolidating a gis asset inventory and a paper work order process into one system are not what Tenable Nessus is typically brought in for.
What can NEXGEN Asset Management do that Tenable Nessus cannot?
NEXGEN Asset Management covers Esri GIS integration, Risk and criticality, Condition assessment, Capital planning. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection.

Answered from the vendors’ own pages

NEXGEN Asset Management: How is NEXGEN priced?

On a tiered model based on the number of assets under management, quoted per agency. Nothing is published.

Tenable Nessus: What are the three Nessus offerings?

Nessus Essentials is a free introductory offering for educators, students, and career starters, limited to 16 IPs for scanning. Nessus Professional is designed for consultants and SMBs, providing unlimited IT scans across any location. Nessus Expert is the premium offering extending Professional with web application scanning, infrastructure-as-code scanning, and external attack surface assessment up to 5 domains.

Source
NEXGEN Asset Management: Do we need Esri ArcGIS?

Not strictly, but the product is designed around it and most of the value assumes a maintained GIS asset layer.

Tenable Nessus: What OS platforms does Nessus support?

Nessus runs on Debian/Kali Linux, Fedora, FreeBSD, Mac OS X, Red Hat/CentOS, SUSE Linux, Ubuntu, and various Windows versions including Server 2008, 2012, and Windows 7-10.

Source
NEXGEN Asset Management: Does it handle capital planning?

Yes. Risk, criticality and condition scores feed multi-year renewal forecasts intended for board and council submissions.

Tenable Nessus: Can I use Nessus to scan third-party networks as a consultant?

Yes, Tenable permits you to use Nessus to scan third-party networks. Nessus Professional is ideal for consultants.

Source
NEXGEN Asset Management: Is there a mobile app?

Yes, a map-based field application with offline capability, licensed alongside the core platform.

Tenable Nessus: Can Nessus perform PCI external scanning?

Yes, you can use Nessus Professional to perform external network scans as required by the PCI DSS 11.2.2 requirement.

Source
Tenable Nessus: What additional features does Nessus Expert provide?

Web application scanning, which is dynamic application security testing (DAST) providing comprehensive visibility and insight into web application security issues; scanning code repositories for vulnerabilities; and assessing external attack surface with subdomain discovery.

Source
Tenable Nessus: What support options exist for Nessus Professional?

Standard Support includes software upgrades, patches, plugin access, and 24x7 support via chat and community portal. Advanced Support adds 24x7 phone access and committed SLAs: P1 less than 2 hours, P2 less than 4 hours, P3 less than 12 hours, P4 less than 24 hours.

Source
Tenable Nessus: How frequently are Nessus plugins updated?

Nessus plugins are updated daily, based on when vendors and security research sites publish new vulnerabilities.

Source
Tenable Nessus: How does licensing work in virtual machine environments?

Whether you are using Nessus in a physical or a virtual environment, the IP addresses or hosts that you are scanning from must be licensed.

Source
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