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Developer Tools · head to head

Moonrepo vs Tenable Nessus

Moonrepo logo

Moonrepo

Developer Tools

Monorepo build system and version manager platform

From
Free
Free plan
Yes
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Moonrepo smaller community compared to established build systems like Bazel; 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: Moonrepo covers Task orchestration, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Moonrepo and Tenable Nessus differ
AttributeMoonrepoTenable Nessus
Pricing modelopen-sourcesubscription
PlatformsWeb, CLIWindows, Linux, Macos, Cloud
CategoryDeveloper ToolsCybersecurity
FoundedUnknown2002

Identical on both: starting price (Free), free tier (Yes), 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 Moonrepo

  • Task orchestration
  • Smart hashing
  • Dependency analysis
  • Multi-language version management
  • Contextual detection
  • Integrated development environment
  • Git integration

Only in Tenable Nessus

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

What people use each for

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

Moonrepo

  • Managing multiple language projects in a single repositorynot Tenable Nessus
  • Automating developer environment setup with consistent toolchain versionsnot Tenable Nessus
  • Optimizing monorepo builds with intelligent task cachingnot Tenable Nessus
  • Enforcing consistent development practices across distributed teamsnot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

Moonrepo

  • Smaller community compared to established build systems like Bazel
  • Limited integrations with enterprise CI/CD platforms
  • Documentation gaps in some advanced use cases
  • No commercial support option for organizations requiring guaranteed SLAs

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

Moonrepo

Free

No published plan breakdown. See the Moonrepo review.

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 Moonrepo if

  • You need task orchestration.
  • You want to start without paying.
  • You work on Web, CLI.
  • You also want smart hashing.
Moonrepo 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 Moonrepo or Tenable Nessus better?
Neither clearly leads. Moonrepo 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, Moonrepo or Tenable Nessus?
Moonrepo starts at Free and Tenable Nessus at Free.
Does Moonrepo or Tenable Nessus run on more platforms?
Moonrepo runs on Web, CLI. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use Moonrepo for free?
Both have a free tier, so you can try either at no cost before committing.
What is Moonrepo best used for?
Moonrepo is most often used for managing multiple language projects in a single repository, automating developer environment setup with consistent toolchain versions, optimizing monorepo builds with intelligent task caching, enforcing consistent development practices across distributed teams. Of those, managing multiple language projects in a single repository and automating developer environment setup with consistent toolchain versions are not what Tenable Nessus is typically brought in for.
What can Moonrepo do that Tenable Nessus cannot?
Moonrepo covers Task orchestration, Smart hashing, Dependency analysis, Multi-language version management. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection.

Answered from the vendors’ own pages

Moonrepo: What programming languages does Moonrepo support?

Moonrepo's proto version manager supports Node.js, Python, Go, Rust, Deno, Java, Ruby, and other languages, with the build system moon supporting most modern development stacks.

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
Moonrepo: Is Moonrepo suitable for large monorepos?

Yes, Moonrepo is designed to scale to monorepos of any size with intelligent caching and task orchestration to maintain build performance.

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
Moonrepo: Can I use just moon or just proto separately?

Yes, moon and proto are independent tools that can be adopted separately or together to address specific team needs.

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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