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Cybersecurity · head to head

Nessus vs Treblle

Nessus logo

Nessus

Cybersecurity

The most trusted vulnerability assessment solution

From
$4790/year
Rated
-
Full reviewWebsite
Treblle logo

Treblle

APIs

API observability, security, and governance platform

From
$233/month
Rated
-
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; Treblle no free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
  • They diverge on capability: Nessus covers Vulnerability scanning, Treblle covers API discovery.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Nessus and Treblle actually diverge.

Attributes where Nessus and Treblle differ
AttributeNessusTreblle
Starting price$4790/year$233/month
PlatformsDesktop, Apiweb, api
CategoryCybersecurityAPIs
Founded2002Unknown

Identical on both: pricing model (subscription), 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 Treblle

  • API discovery
  • Runtime security
  • API governance
  • Compliance monitoring
  • API documentation and analytics
  • Agentic AI support

What people use each for

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

Nessus

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

Treblle

  • Gaining full visibility into API traffic across multi-cloud environmentsnot Nessus
  • Detecting shadow APIs and runtime security risksnot Nessus
  • Meeting compliance audit requirements such as HIPAA or GDPRnot Nessus
  • Governing API design standards through CI/CDnot 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

Treblle

  • No free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
  • Growth and Enterprise pricing is custom and not published, requiring a sales conversation to budget.
  • Core plan is limited to 1 workspace and only 30 days of data retention.
  • SSO and on-prem/BYO cloud deployment are reserved for the top Enterprise tier.

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

Treblle

$233/month
  • Core$233/month
    • Billed yearly
    • 5 APIs
    • 500 requests/min
  • Growth$undefined/month
    • Custom APIs and request limits
    • 50M requests/month baseline
    • API security
  • Enterprise$undefined/month
    • Unlimited workspaces, APIs, and requests/min
    • API governance and compliance
    • SSO

Which should you pick?

Choose Nessus if

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

Choose Treblle if

  • You need api discovery.
  • You work on web, api.
  • You also want runtime security.
Treblle review

Questions people ask

Is Nessus or Treblle better?
Neither clearly leads. Nessus starts at $4790/year and Treblle at $233/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nessus or Treblle?
Nessus starts at $4790/year and Treblle at $233/month.
Does Nessus or Treblle run on more platforms?
Nessus runs on Desktop, Api. Treblle runs on web, api.
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 Treblle is typically brought in for.
What can Nessus do that Treblle cannot?
Nessus covers Vulnerability scanning, Configuration auditing, Malware detection, Web application scanning. Treblle covers API discovery, Runtime security, API governance, Compliance monitoring.

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
Treblle: What does Treblle cost?

Treblle's Core plan costs $233/month billed yearly and covers 5 APIs and 5M requests/month; Growth and Enterprise plans use custom pricing for larger request volumes and advanced features.

Source
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
Treblle: Is there a free plan?

Treblle does not offer a free tier; it instead offers a no-credit-card demo rather than free ongoing access.

Source
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
Treblle: How is usage metered?

Plans are metered by number of APIs monitored and requests per minute/month, with the Core plan capped at 500 requests/min and 5M requests/month.

Source
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