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Cybersecurity · head to head

Tenable vs Arnica

Tenable logo

Tenable

Cybersecurity

AI-powered exposure management platform for unified security visibility

From
$3500/year
Rated
-
Full reviewWebsite
Arnica logo

Arnica

Cybersecurity

AI-native application security platform detecting and fixing vulnerabilities across the SDLC

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Arnica has a free tier, so it costs nothing to try first.
  • Each has a real cost: Tenable pricing starts at $3500/year for Tenable One VM, expensive for small organizations; Arnica per-identity pricing ($25-$50/person/year) requires tracking active developers
  • They diverge on capability: Tenable covers Unified attack surface mapping, Arnica covers AI SAST.

Where they differ

Only the attributes on which Tenable and Arnica actually diverge.

Attributes where Tenable and Arnica differ
AttributeTenableArnica
Starting price$3500/yearFree
Pricing modelsubscriptionPer-identity subscription with annual discount
Free tierNoYes
PlatformsCloud, WebWeb, GitHub, IDE

Identical on both: 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 Tenable

  • Unified attack surface mapping
  • Exposure intelligence enrichment
  • Tenable Hexa AI orchestration
  • Cloud Exposure (CNAPP)
  • OT Exposure
  • Identity Exposure
  • Vulnerability Management
  • Attack Surface Management

Only in Arnica

  • AI SAST
  • Software Composition Analysis
  • Secrets detection
  • IaC scanning
  • Container scanning
  • SBOM generation
  • Agentic rules
  • Pipelineless integration

What people use each for

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

Tenable

  • Comprehensive vulnerability scanning for enterprise networksnot Arnica
  • Cloud security monitoring and compliance for AWS, Azure, GCPnot Arnica
  • Identity and access management risk assessmentnot Arnica
  • Operational technology security for industrial systemsnot Arnica
  • Attack surface management for third-party risknot Arnica

Arnica

  • Detecting AI-generated vulnerabilities in Copilot and Cursor suggestionsnot Tenable
  • Finding hardcoded secrets before they reach productionnot Tenable
  • Mapping container vulnerabilities back to source codenot Tenable
  • Generating SBOM for supply chain compliance requirementsnot Tenable
  • Scanning infrastructure-as-code for misconfiguration risksnot Tenable

Where each one falls short

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

Tenable

  • Pricing starts at $3500/year for Tenable One VM, expensive for small organizations
  • Many enterprise features require custom quote and sales engagement
  • Cloud Exposure, OT Exposure, and other modules have no published pricing
  • Multi-year contracts common, limiting flexibility
  • Setup and configuration complexity for enterprise deployments

Arnica

  • Per-identity pricing ($25-$50/person/year) requires tracking active developers
  • Overage identity tracking via 90-day PR activity can be unpredictable
  • Free plan limited to weekly updates, requiring upgrade for real-time scanning
  • Advanced add-ons (Image Scanning, AI SAST, Agentic Rules Enforcer) pricing not published
  • On-premises deployment limited to Enterprise tier

Pricing, plan by plan

Tenable

$3500/year
  • Tenable One Vulnerability Management$3500/year
    • Per 100 assets
    • Multi-year discounts available
  • Tenable One Web App Scanning$3578/year
    • Per 5 FQDNs
    • Annual subscription
  • Nessus Professional$4790/year
    • Vulnerability scanning
    • Multi-year discounts available
    • Optional advanced support: $400/year
  • Nessus Expert$6790/year
    • Advanced vulnerability scanning
    • Multi-year discounts available
    • Optional advanced support: $400/year

Arnica

Free
  • FreeFree
    • No credit card required
    • 14-day trial available
    • Weekly risk identification updates
  • Core Business$360/year
    • Monthly billing option at $30/identity/month
    • Annual billing at $25/identity/month (17% discount)
    • Real-time risk scanning and notifications
  • Core Enterprise$720/year
    • Monthly billing option at $60/identity/month
    • Annual billing at $50/identity/month (17% discount)
    • All Core Business features

Which should you pick?

Choose Tenable if

  • You need unified attack surface mapping.
  • You work on Cloud, Web.
  • You also want exposure intelligence enrichment.
Tenable review

Choose Arnica if

  • You need ai sast.
  • You want to start without paying.
  • You work on Web, GitHub, IDE.
  • You also want software composition analysis.
Arnica review

Questions people ask

Is Tenable or Arnica better?
Neither clearly leads. Tenable starts at $3500/year and Arnica at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Tenable or Arnica?
Arnica has a free tier; the other does not. Paid plans start at $3500/year for Tenable and Free for Arnica.
Does Tenable or Arnica run on more platforms?
Tenable runs on Cloud, Web. Arnica runs on Web, GitHub, IDE.
Can I use Arnica for free?
Yes. Arnica has a free tier, so you can try it without paying. Tenable starts at $3500/year.
What is Tenable best used for?
Tenable is most often used for comprehensive vulnerability scanning for enterprise networks, cloud security monitoring and compliance for aws, azure, gcp, identity and access management risk assessment, operational technology security for industrial systems. Of those, comprehensive vulnerability scanning for enterprise networks and cloud security monitoring and compliance for aws, azure, gcp are not what Arnica is typically brought in for.
What can Tenable do that Arnica cannot?
Tenable covers Unified attack surface mapping, Exposure intelligence enrichment, Tenable Hexa AI orchestration, Cloud Exposure (CNAPP). Arnica covers AI SAST, Software Composition Analysis, Secrets detection, IaC scanning.

Answered from the vendors’ own pages

Tenable: How is Tenable One pricing structured?

Tenable One Vulnerability Management costs $3500/year per 100 assets. Web App Scanning is $3578/year per 5 FQDNs. Multi-year discounts are available.

Source
Arnica: How are identities defined in Arnica pricing?

Identities are any users and other contributing entities that contributed code and/or had PR activity during the last 90 days. This ensures billing matches active developers.

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

Nessus Professional costs $4790/year and provides core vulnerability scanning. Nessus Expert costs $6790/year and offers advanced scanning capabilities.

Source
Arnica: What is the annual discount?

Annual prepayment offers approximately 17% savings versus monthly billing. Core Business annual is $300/identity versus $360 for monthly.

Source
Tenable: Are custom support and training available for Tenable?

Yes. Optional advanced support is available for $400/year. Training courses range from $275-$385/year.

Source
Arnica: Can I cancel or downgrade Arnica anytime?

Yes. Subscriptions can be cancelled or downgraded at any time. Overage identities receive automatic protection with true-up invoicing.

Source
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