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Cybersecurity · head to head

Tenable Nessus vs WireGuard

Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Rated
-
Full reviewWebsite
WireGuard logo

WireGuard

Cybersecurity

Modern, minimal-complexity VPN protocol with state-of-the-art cryptography

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Tenable Nessus nessus Professional is $4,790 for one year, sold as an annual licence rather than a per scan or usage based fee; WireGuard manual key management required; WireGuard does not provide automated peer discovery or key distribution mechanisms
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Tenable Nessus and WireGuard differ
AttributeTenable NessusWireGuard
Pricing modelsubscriptionopen-source
PlatformsWindows, Linux, Macos, CloudLinux, Windows, macOS, iOS, Android, FreeBSD, OpenBSD
Founded2002Unknown

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 Tenable Nessus

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

Only in WireGuard

Nothing recorded that Tenable Nessus does not also cover.

What people use each for

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

Tenable Nessus

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

WireGuard

  • Site-to-site VPN connectivity for datacentres and branch officesnot Tenable Nessus
  • High-performance VPN applications requiring minimal latency and CPU overheadnot Tenable Nessus
  • Embedded systems and IoT devices with strict memory and storage constraintsnot Tenable Nessus
  • WireGuard-based managed services (Tailscale, Mullvad VPN) providing abstraction over raw protocolnot Tenable Nessus
  • Kernel module for Linux-based VPN appliances and firewallsnot Tenable Nessus
  • Research and development in cryptographic protocol designnot Tenable Nessus

Where each one falls short

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

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

WireGuard

  • Manual key management required; WireGuard does not provide automated peer discovery or key distribution mechanisms
  • No built-in support for address allocation or DHCP; all IP assignments must be manually configured
  • Limited to UDP; TCP encapsulation requires wrapper tools, making it unsuitable for environments blocking UDP
  • Stateless protocol design means lost packets trigger peer disconnection rather than transparent reconnection
  • Requires operational expertise to securely configure and deploy; not suitable for non-technical users without wrapper tools (Tailscale, Mullvad)

Pricing, plan by plan

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

WireGuard

Free

No published plan breakdown. See the WireGuard review.

Which should you pick?

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

Choose WireGuard if

  • You want to start without paying.
  • You work on Linux, Windows, macOS, iOS, Android, FreeBSD, OpenBSD.
WireGuard review

Questions people ask

Is Tenable Nessus or WireGuard better?
Neither clearly leads. Tenable Nessus starts at Free and WireGuard at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Tenable Nessus or WireGuard?
Tenable Nessus starts at Free and WireGuard at Free.
Does Tenable Nessus or WireGuard run on more platforms?
Tenable Nessus runs on Windows, Linux, Macos, Cloud. WireGuard runs on Linux, Windows, macOS, iOS, Android, FreeBSD, OpenBSD.
Can I use Tenable Nessus for free?
Both have a free tier, so you can try either at no cost before committing.
What is Tenable Nessus best used for?
Tenable Nessus is most often used for vulnerability scanning of servers, network devices and web applications, configuration and compliance auditing against hardening benchmarks, point in time assessments by consultants and penetration testers. Of those, vulnerability scanning of servers, network devices and web applications and configuration and compliance auditing against hardening benchmarks are not what WireGuard is typically brought in for.
What can Tenable Nessus do that WireGuard cannot?
Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection.

Answered from the vendors’ own pages

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
WireGuard: Is WireGuard free?

Yes, WireGuard is free and open-source software. The Linux kernel module is licensed under GPLv2; implementations for other platforms use MIT or Apache 2.0 licences. There are no licensing fees.

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
WireGuard: How does WireGuard differ from IPsec and OpenVPN?

WireGuard replaces complex negotiation protocols and state machines with simple public-key cryptography. Its code is roughly 100 times smaller than IPsec, making it faster to audit, deploy, and maintain. It uses modern cryptographic primitives rather than legacy algorithms.

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
WireGuard: Can I use WireGuard for a commercial VPN service?

Yes. Several commercial VPN services (Mullvad, IVPN, ProtonVPN) use WireGuard as their underlying protocol. You must implement peer management, key distribution, and endpoint selection on top of the WireGuard protocol.

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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