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Cybersecurity · head to head

Socket vs Tenable Nessus

Socket logo

Socket

Cybersecurity

Supply chain security platform detecting and blocking malicious dependencies

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: Socket team plan requires minimum 5-developer commitment, expensive for small teams; 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: Socket covers Automatic blocking, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Socket and Tenable Nessus differ
AttributeSocketTenable Nessus
Pricing modelPer-developer monthly subscription with tiered accesssubscription
PlatformsWeb, CLI, GitHubWindows, Linux, Macos, Cloud
Founded20212002

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 Socket

  • Automatic blocking
  • AI behavior analysis
  • Reachability analysis
  • Slack integration
  • SBOM support
  • SAML SSO
  • GitHub Actions scanning

Only in Tenable Nessus

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

Both cover

  • Malware detection

What people use each for

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

Socket

  • Blocking zero-day malware attacks in JavaScript dependenciesnot Tenable Nessus
  • Managing CVE false positives with precomputed reachability analysisnot Tenable Nessus
  • Securing Python and Go supply chains at scalenot Tenable Nessus
  • Automating compliance requirements for regulated industriesnot Tenable Nessus
  • Real-time threat notifications via Slack integrationnot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

Socket

  • Team plan requires minimum 5-developer commitment, expensive for small teams
  • Business plan $50/dev/month becomes costly for teams exceeding 20 members
  • Enterprise pricing requires custom consultation with no transparent pricing
  • Free plan limited to individual developers without team collaboration
  • Reachability analysis improvement (90% false positive reduction) only on Enterprise

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

Socket

Free
  • FreeFree
    • For individual developers
    • Detects 70+ risk types
    • Blocks malicious dependencies automatically
  • Team$25/month
    • Per developer on minimum 5 developers
    • Precomputed reachability analysis cuts 60% false positives
    • Slack alerts for threats
  • Business$50/month
    • Per developer on minimum 20 developers
    • All Team features
    • Compliance integrations with Vanta
  • Enterprise$undefined/custom
    • Function-level reachability eliminates up to 90% irrelevant CVEs
    • Multi-repository system support
    • Named account manager

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 Socket if

  • You need automatic blocking.
  • You want to start without paying.
  • You work on Web, CLI, GitHub.
  • You also want ai behavior analysis.
Socket 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 Socket or Tenable Nessus better?
Neither clearly leads. Socket 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, Socket or Tenable Nessus?
Socket starts at Free and Tenable Nessus at Free.
Does Socket or Tenable Nessus run on more platforms?
Socket runs on Web, CLI, GitHub. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use Socket for free?
Both have a free tier, so you can try either at no cost before committing.
What is Socket best used for?
Socket is most often used for blocking zero-day malware attacks in javascript dependencies, managing cve false positives with precomputed reachability analysis, securing python and go supply chains at scale, automating compliance requirements for regulated industries. Of those, blocking zero-day malware attacks in javascript dependencies and managing cve false positives with precomputed reachability analysis are not what Tenable Nessus is typically brought in for.
What can Socket do that Tenable Nessus cannot?
Socket covers Automatic blocking, AI behavior analysis, Reachability analysis, Slack integration. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Compliance checking. Both handle Malware detection.

Answered from the vendors’ own pages

Socket: How many zero-day attacks does Socket detect?

Socket detects over 100 zero-day attacks weekly across JavaScript, Python, and Go ecosystems.

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
Socket: What is precomputed reachability analysis?

Socket's precomputed reachability analysis cuts CVE false positives by 60% automatically on Team plans, and up to 90% on Enterprise plans through function-level analysis.

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
Socket: Is there a discount for annual billing?

Yes. Socket offers a 20% discount for annual commitments across all subscription tiers.

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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