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Cybersecurity · head to head

Frontegg vs Tenable Nessus

Frontegg logo

Frontegg

Cybersecurity

Customer identity and access management platform for SaaS applications

From
Free
Rated
-
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Frontegg detailed per-unit pricing beyond the free tier is not published, requiring use of an online calculator or sales contact to estimate 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: Frontegg covers Hosted login, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Frontegg and Tenable Nessus differ
AttributeFronteggTenable Nessus
Pricing modelusage-basedsubscription
Platformsweb, apiWindows, Linux, Macos, Cloud
FoundedUnknown2002

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Cybersecurity).

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 Frontegg

  • Hosted login
  • Enterprise SSO/SCIM
  • Multi-tenant organizations
  • Custom domains
  • M2M tokens
  • Fraud protection

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.

Frontegg

  • Adding enterprise SSO/SCIM to a B2B SaaS productnot Tenable Nessus
  • Multi-tenant customer identity managementnot Tenable Nessus
  • White-labeled, custom-domain login experiencesnot Tenable Nessus
  • Securing AI agent access to a SaaS product via Agen.conot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

Frontegg

  • Detailed per-unit pricing beyond the free tier is not published, requiring use of an online calculator or sales contact to estimate costs.
  • Advanced fraud protection and multiple environments are Enterprise-only, unavailable on the Pay As You Go plan.
  • The 7,500 free monthly active users is comparatively modest next to some competitors' free tiers.
  • As a broader CIAM platform, it can be more complex to integrate than lighter-weight developer-first auth tools for smaller apps.

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

Frontegg

Free
  • Pay As You GoFree
    • 7,500 monthly active users included
    • 5 enterprise connections (SSO/SCIM)
    • Unlimited organizations
  • Enterprise$undefined/month
    • Custom pricing
    • Multiple environments
    • Advanced fraud protection

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 Frontegg if

  • You need hosted login.
  • You want to start without paying.
  • You work on web, api.
  • You also want enterprise sso/scim.
Frontegg 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 Frontegg or Tenable Nessus better?
Neither clearly leads. Frontegg starts at Free and Tenable Nessus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Frontegg or Tenable Nessus?
Frontegg starts at Free and Tenable Nessus at Free.
Does Frontegg or Tenable Nessus run on more platforms?
Frontegg runs on web, api. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use Frontegg for free?
Both have a free tier, so you can try either at no cost before committing.
What is Frontegg best used for?
Frontegg is most often used for adding enterprise sso/scim to a b2b saas product, multi-tenant customer identity management, white-labeled, custom-domain login experiences, securing ai agent access to a saas product via agen.co. Of those, adding enterprise sso/scim to a b2b saas product and multi-tenant customer identity management are not what Tenable Nessus is typically brought in for.
What can Frontegg do that Tenable Nessus cannot?
Frontegg covers Hosted login, Enterprise SSO/SCIM, Multi-tenant organizations, Custom domains. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection.

Answered from the vendors’ own pages

Frontegg: What does Frontegg cost?

Frontegg's Pay As You Go plan is free up to 7,500 monthly active users, after which pricing scales with users, enterprise connections and M2M tokens via an online calculator; Enterprise pricing is custom.

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
Frontegg: Is there a free plan and what are its limits?

Yes, the free Pay As You Go plan includes 7,500 monthly active users, 5 enterprise SSO/SCIM connections, unlimited organizations, and a custom domain.

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
Frontegg: How is usage metered?

Pricing is consumption-based, driven by monthly active users, monthly enterprise connections (SSO/SCIM), and monthly M2M tokens, with customers paying only for usage beyond the free 7,500-user threshold.

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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