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Customer Support · head to head

Kustomer vs Tenable Nessus

Kustomer logo

Kustomer

Customer Support

The future of customer service

From
On request
Rated
-
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Tenable Nessus has a free tier, so it costs nothing to try first.
  • Each has a real cost: Kustomer pricing not published; requires customised sales assessment and quote for exact costs; 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: Kustomer covers Unified customer view, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Kustomer and Tenable Nessus actually diverge.

Attributes where Kustomer and Tenable Nessus differ
AttributeKustomerTenable Nessus
Starting priceOn requestFree
Pricing modelquotesubscription
Free tierNoYes
PlatformsWeb, CloudWindows, Linux, Macos, Cloud
CategoryCustomer SupportCybersecurity
Founded20152002

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 Kustomer

  • Unified customer view
  • AI automation
  • Omnichannel
  • Workflow automation
  • Knowledge base
  • Analytics
  • Shopify
  • Magento

Only in Tenable Nessus

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

Both cover

  • GDPR

What people use each for

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

Kustomer

  • Large B2C and B2B organisations managing 600+ customer support interactions across omnichannel platformsnot Tenable Nessus
  • Retail, financial services, travel and hospitality sectors requiring integrated AI-powered supportnot Tenable Nessus
  • Enterprises seeking customer 360 views and advanced workflow automationnot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

Kustomer

  • Pricing not published; requires customised sales assessment and quote for exact costs
  • Voice (call), SMS, and WhatsApp support operate on separate pay-as-you-go pricing models
  • Customisation-based pricing structure means no transparent cost comparison with competitors

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

Kustomer

On request

No published plan breakdown. See the Kustomer review.

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 Kustomer if

  • You need unified customer view.
  • You work on Web, Cloud.
  • You also want ai automation.
Kustomer 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 Kustomer or Tenable Nessus better?
Neither clearly leads. Kustomer 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, Kustomer or Tenable Nessus?
Tenable Nessus has a free tier; the other does not. Paid plans start at On request for Kustomer and Free for Tenable Nessus.
Does Kustomer or Tenable Nessus run on more platforms?
Kustomer runs on Web, Cloud. 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. Kustomer starts at On request.
What is Kustomer best used for?
Kustomer is most often used for large b2c and b2b organisations managing 600+ customer support interactions across omnichannel platforms, retail, financial services, travel and hospitality sectors requiring integrated ai-powered support, enterprises seeking customer 360 views and advanced workflow automation. Of those, large b2c and b2b organisations managing 600+ customer support interactions across omnichannel platforms and retail, financial services, travel and hospitality sectors requiring integrated ai-powered support are not what Tenable Nessus is typically brought in for.
What can Kustomer do that Tenable Nessus cannot?
Kustomer covers Unified customer view, AI automation, Omnichannel, Workflow automation. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection. Both handle GDPR.

Answered from the vendors’ own pages

Kustomer: How much does Kustomer cost?

Kustomer uses a custom, quote-based pricing model and does not publish standard rates. Every CX team setup is different, so pricing varies based on company size, number of support agents, and monthly conversation volume.

Source
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
Kustomer: How do I get a Kustomer pricing quote?

Complete a 2-minute ROI calculator assessment that gathers information about your industry, company size, agent count, and monthly conversation volume. Results provide directional pricing estimates before sales connects with you.

Source
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
Kustomer: Are there add-on costs for Kustomer features?

Yes, add-on services include HIPAA Enabled Subscription, implementation services, Voice, SMS, and WhatsApp support on a pay-as-you-go model.

Source
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
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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