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Cybersecurity · head to head

LogRhythm SIEM vs Tenable Nessus

LogRhythm SIEM logo

LogRhythm SIEM

Cybersecurity

AI-powered SIEM platform for modern security operations

From
On request
Rated
-
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Tenable Nessus has a free tier, so it costs nothing to try first.
  • Each has a real cost: LogRhythm SIEM no pricing published; sales contact required; 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: LogRhythm SIEM covers AI-driven analytics, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which LogRhythm SIEM and Tenable Nessus actually diverge.

Attributes where LogRhythm SIEM and Tenable Nessus differ
AttributeLogRhythm SIEMTenable Nessus
Starting priceOn requestFree
Free tierNoYes
PlatformsWeb, ApiWindows, Linux, Macos, Cloud
Founded20032002

Identical on both: pricing model (subscription), 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 LogRhythm SIEM

  • AI-driven analytics
  • UEBA
  • NDR integration
  • SOAR automation
  • Threat lifecycle management
  • Case management
  • Compliance reporting
  • Embedded playbooks

Only in Tenable Nessus

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

Both cover

  • AWS
  • Azure
  • ServiceNow
  • ISO 27001

What people use each for

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

LogRhythm SIEM

  • Security information and event managementnot Tenable Nessus
  • Threat detection and incident responsenot Tenable Nessus
  • Compliance monitoring and reportingnot Tenable Nessus
  • User and entity behavior analyticsnot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

LogRhythm SIEM

  • No pricing published; sales contact required
  • No public information on licensing model or per-unit 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
  • 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

LogRhythm SIEM

On request
  • LogRhythm SIEMFree
    • Threat detection
    • Log management
    • Compliance
  • LogRhythm AxonFree
    • Cloud-native SIEM
    • Self-service deployment
    • Elastic scaling
  • Managed Detection & ResponseFree
    • 24/7 monitoring
    • Expert analysts
    • Threat hunting

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 LogRhythm SIEM if

  • You need ai-driven analytics.
  • You work on Web, Api.
  • You also want ueba.
LogRhythm SIEM 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 LogRhythm SIEM or Tenable Nessus better?
Neither clearly leads. LogRhythm SIEM starts at On request and Tenable Nessus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, LogRhythm SIEM or Tenable Nessus?
Tenable Nessus has a free tier; the other does not. Paid plans start at On request for LogRhythm SIEM and Free for Tenable Nessus.
Does LogRhythm SIEM or Tenable Nessus run on more platforms?
LogRhythm SIEM runs on Web, Api. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use Tenable Nessus for free?
Yes. Tenable Nessus has a free tier, so you can try it without paying. LogRhythm SIEM starts at On request.
What is LogRhythm SIEM best used for?
LogRhythm SIEM is most often used for security information and event management, threat detection and incident response, compliance monitoring and reporting, user and entity behavior analytics. Of those, security information and event management and threat detection and incident response are not what Tenable Nessus is typically brought in for.
What can LogRhythm SIEM do that Tenable Nessus cannot?
LogRhythm SIEM covers AI-driven analytics, UEBA, NDR integration, SOAR automation. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection. Both handle AWS, Azure, ServiceNow, ISO 27001.

Answered from the vendors’ own pages

LogRhythm SIEM: How does Exabeam (formerly LogRhythm SIEM) handle pricing?

Exabeam does not publish pricing on its website. To obtain pricing information, request a demo through the website or contact Exabeam's sales team directly for a personalized quote based on your deployment size and requirements.

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
LogRhythm SIEM: Is there a free trial or freemium version of Exabeam?

Exabeam does not advertise a free trial or freemium tier on its homepage. Interested buyers must contact the sales team to discuss trial availability and pricing options.

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
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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