Softwr

Cybersecurity · head to head

Nessus vs Zencity

Nessus logo

Nessus

Cybersecurity

The most trusted vulnerability assessment solution

From
$4790/year
Free plan
No
Full reviewWebsite
Zencity logo

Zencity

Government

Resident sentiment analysis combining organic social listening with representative surveys

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Each has a real cost: Nessus nessus Professional is $4,790 for one year, with no free or low cost commercial tier; Zencity social listening is structurally biased toward residents who post, so a city using the listening product without the survey product will consistently mistake volume for consensus.
  • They diverge on capability: Nessus covers Vulnerability scanning, Zencity covers Organic social listening.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Nessus and Zencity actually diverge.

Attributes where Nessus and Zencity differ
AttributeNessusZencity
Starting price$4790/yearOn request
Pricing modelsubscriptionquote
PlatformsDesktop, ApiWeb
CategoryCybersecurityGovernment
Founded2002Unknown

Identical on both: free tier (No), 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 Nessus

  • Vulnerability scanning
  • Configuration auditing
  • Malware detection
  • Web application scanning
  • Cloud scanning
  • Compliance checks
  • Patch auditing
  • Pre-built policies

Only in Zencity

  • Organic social listening
  • Representative surveys
  • Community trust surveys
  • Topic and sentiment analysis
  • Service request integration
  • Leadership reporting

What people use each for

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

Nessus

  • Vulnerability scanning for individual practitionersnot Zencity
  • Enterprise vulnerability managementnot Zencity
  • Web application security assessmentsnot Zencity

Zencity

  • A city manager deciding whether a social media outcry reflects a representative viewnot Nessus
  • A police department measuring community trust with a sampled instrument rather than complaint volumenot Nessus
  • A communications team wanting early warning on a service issue before it reaches councilnot Nessus
  • A council needing resident input on a policy without running its own survey operationnot Nessus

Where each one falls short

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

Nessus

  • Nessus Professional is $4,790 for one year, with no free or low cost commercial tier
  • Multi year terms are the only discount route, at $9,330.95 for two years and $13,637.54 for three
  • It is a single user scanner, so team workflows mean migrating to another Tenable product
  • Tenable One vulnerability management is priced separately, starting at $3,500 a year for 100 assets

Zencity

  • Social listening is structurally biased toward residents who post, so a city using the listening product without the survey product will consistently mistake volume for consensus.
  • Government analysis of residents' public speech, particularly by police departments, has drawn civil liberties criticism and records request scrutiny in United States cities, and agencies need a public answer ready before signing.
  • Sentiment classification of local slang, sarcasm and non English posts is imperfect, and a misclassified theme presented in a leadership briefing can be acted on before anyone checks the underlying posts.
  • Survey sample sizes at neighbourhood level are often small, so the district level breakdowns that councils most want are the least reliable numbers in the report.
  • It reports on opinion without connecting to service delivery systems, so acting on a finding remains a separate manual process in whatever operational software the agency runs.

Pricing, plan by plan

Nessus

$4790/year
  • Nessus Professional$4790/year
    • 1 year license
    • Best for individual security professionals
  • Nessus Professional 2-Year$9330.95/2 years
    • 2 year license with discounted rate vs. annual
  • Nessus Professional 3-Year$13637.54/3 years
    • 3 year license with discounted rate vs. annual
  • Nessus Expert$6790/year
    • 1 year license
    • Enhanced capabilities vs. Professional

Zencity

On request
  • Zencity$undefined/year
    • Quoted annually by population served and module scope
    • Survey programmes priced separately from the listening platform
    • Police community trust surveying sold as its own line

Which should you pick?

Choose Nessus if

  • You need vulnerability scanning.
  • You work on Desktop, Api.
  • You also want configuration auditing.
Nessus review

Choose Zencity if

  • You need organic social listening.
  • You also want representative surveys.
Zencity review

Questions people ask

Is Nessus or Zencity better?
Neither clearly leads. Nessus starts at $4790/year and Zencity at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nessus or Zencity?
Nessus starts at $4790/year and Zencity at On request.
Does Nessus or Zencity run on more platforms?
Nessus runs on Desktop, Api. Zencity runs on Web.
What is Nessus best used for?
Nessus is most often used for vulnerability scanning for individual practitioners, enterprise vulnerability management, web application security assessments. Of those, vulnerability scanning for individual practitioners and enterprise vulnerability management are not what Zencity is typically brought in for.
What can Nessus do that Zencity cannot?
Nessus covers Vulnerability scanning, Configuration auditing, Malware detection, Web application scanning. Zencity covers Organic social listening, Representative surveys, Community trust surveys, Topic and sentiment analysis.

Answered from the vendors’ own pages

Nessus: What is the cheapest Nessus option?

Nessus Professional starts at $4,790 per year for a 1-year license. Multi-year commitments offer discounts, with 2-year licenses at $9,330.95 and 3-year licenses at $13,637.54.

Source
Zencity: Is this surveillance of residents?

It analyses publicly posted content and aggregated survey responses rather than private accounts, but the distinction has been contested publicly, especially for police use. Prepare an explanation before procurement.

Nessus: What is the difference between Nessus Professional and Expert?

Nessus Expert costs $6,790 per year for a 1-year license (compared to $4,790 for Professional) and includes enhanced capabilities. Multi-year rates are available at discounted prices.

Source
Zencity: Why pair listening with surveys?

Because the people who post are not representative of the people who live there. The gap between the two datasets is often the most useful output.

Nessus: Does Nessus offer optional support or training?

Yes, Nessus offers add-on services: Advanced Support at $400/year provides 24x365 access to phone, email, community, and chat support. On-Demand Training costs $275/year for Fundamentals course access or $385/year for both Fundamentals and Advanced courses.

Source
Zencity: What did Zencity acquire?

Elucd, in 2021, which brought community trust survey methodology used with police departments.

Zencity: Can residents find out what our city bought?

Yes. These are public contracts and several have been obtained and published through records requests.

Share

Related pages

More on Nessus

More on Zencity

Keep looking

Other head to heads