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Cybersecurity · head to head

Nessus vs Postman

Nessus logo

Nessus

Cybersecurity

Vulnerability assessment solution

From
$4790/year
Free plan
No
Visit NessusFull review
Postman logo

Postman

Developer Tools

The API platform for building and using APIs

From
Free
Free plan
Yes
Visit PostmanFull review

The short version

  • Postman is an API platform for building and using APIs.
  • Postman has a free plan, then $14/mo; Nessus starts at $4790/yr.
  • Only Nessus lists vulnerability scanning; only Postman lists API client.
  • Where Nessus falls short: Nessus Professional is $4,790 for one year, with no free or low cost commercial tier.
  • Where Postman falls short: free plan limited to single user as of March 1, 2026, making it unsuitable for teams without paid plans.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Nessus and Postman actually diverge.

Attributes where Nessus and Postman differ
AttributeNessusPostman
Starting price$4790/yearFree
Free tierNoYes
PlatformsWindows, macOS, APIWeb, Windows, macOS, Linux
CategoryCybersecurityDeveloper Tools
Founded20022014

Not yet recorded: pricing model for Postman.

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 Nessus

  • Vulnerability scanning
  • Configuration auditing
  • Malware detection
  • Web application scanning
  • Cloud scanning
  • Compliance checks
  • Patch auditing
  • Pre-built policies

Only in Postman

  • API client
  • Automated testing
  • Mock servers
  • Documentation
  • Monitors
  • Workspaces
  • Version control
  • API design

What people use each for

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

Nessus

  • Vulnerability scanning for individual practitionersnot Postman
  • Enterprise vulnerability managementnot Postman
  • Web application security assessmentsnot Postman

Postman

  • API testingnot Nessus
  • API documentationnot Nessus
  • API monitoringnot Nessus
  • Team collaborationnot Nessus
  • API developmentnot Nessus

Where each one falls short

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

Nessus

  • Nessus Professional is $4,790 for one year, with no free or low cost commercial tier
  • Multi year terms are the only discount route, at $9,330.95 for two years and $13,637.54 for three
  • It is a single user scanner, so team workflows mean migrating to another Tenable product
  • Tenable One vulnerability management is priced separately, starting at $3,500 a year for 100 assets

Postman

  • Free plan limited to single user as of March 1, 2026, making it unsuitable for teams without paid plans
  • Only 25 collection runs per month and 1,000 API calls/month on free tier
  • Removed local-only Scratch Pad mode in 2023, forcing cloud account creation and sync
  • Requires Postman account and internet connection for most features
  • Cloud-first architecture with mandatory syncing to Postman's cloud servers
  • No CI/CD integration or advanced security features on free plan

Pricing, plan by plan

Nessus

$4790/year
  • Nessus Professional$4,790/yr
    • 1 year license
    • Best for individual security professionals
  • Nessus Professional 2-Year$9,330.95/2 years
    • 2 year license with discounted rate vs. annual
  • Nessus Professional 3-Year$13,637.54/3 years
    • 3 year license with discounted rate vs. annual
  • Nessus Expert$6,790/yr
    • 1 year license
    • Enhanced capabilities vs. Professional

Postman

Free
  • FreeFree
    • 1 user
    • 25 collection runs/month
    • 1,000 API calls/month
  • Team$14/mo
    • Team collaboration
    • Shared workspaces
    • API mocking
  • Professional$29/mo
    • Team features
    • Advanced security
    • SSO
  • Enterprise$49/mo
    • Professional features
    • Custom integrations
    • Priority support

Which should you pick?

Choose Nessus if

  • You need vulnerability scanning.
  • You work on Windows, macOS, API.
  • You also want configuration auditing.
Nessus review

Choose Postman if

  • You need api client.
  • You want to start without paying.
  • You work on Web, Windows, macOS, Linux.
  • You also want automated testing.
Postman review

Questions people ask

Is Nessus or Postman better?
Neither clearly leads. Nessus starts at $4790/year and Postman at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nessus or Postman?
Postman has a free tier; the other does not. Paid plans start at $4790/year for Nessus and Free for Postman.
Does Nessus or Postman run on more platforms?
Nessus runs on Windows, macOS, API. Postman runs on Web, Windows, macOS, Linux.
Can I use Postman for free?
Yes. Postman has a free tier, so you can try it without paying. Nessus starts at $4790/year.
What is Nessus best used for?
Nessus is most often used for vulnerability scanning for individual practitioners, enterprise vulnerability management, web application security assessments. Of those, vulnerability scanning for individual practitioners and enterprise vulnerability management are not what Postman is typically brought in for.
What can Nessus do that Postman cannot?
Nessus covers Vulnerability scanning, Configuration auditing, Malware detection, Web application scanning. Postman covers API client, Automated testing, Mock servers, Documentation.

Answered from the vendors’ own pages

Nessus: What is the cheapest Nessus option?

Nessus Professional starts at $4,790 per year for a 1-year license. Multi-year commitments offer discounts, with 2-year licenses at $9,330.95 and 3-year licenses at $13,637.54.

Source
Postman: What is the cost of Postman?

Postman has a free plan limited to 1 user, 25 collection runs/month, 1,000 API calls/month. Team plans start at $14/user/month for Basic. Professional at $29/user/month, and Enterprise at $49/user/month.

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

Nessus Expert costs $6,790 per year for a 1-year license (compared to $4,790 for Professional) and includes enhanced capabilities. Multi-year rates are available at discounted prices.

Source
Postman: Can I use Postman offline?

Postman requires an internet connection to sync collections to the cloud. Since 2023, the Scratch Pad local-only mode was removed. Users must sign in with a Postman account, and collections sync to cloud by default. Offline work is possible but limited without cloud sync features.

Source
Nessus: Does Nessus offer optional support or training?

Yes, Nessus offers add-on services: Advanced Support at $400/year provides 24x365 access to phone, email, community, and chat support. On-Demand Training costs $275/year for Fundamentals course access or $385/year for both Fundamentals and Advanced courses.

Source
Postman: Does Postman have team collaboration?

Team collaboration is not available on the free plan (limited to 1 user). Team plans start at $14/user/month and include shared workspaces, real-time collaboration, and team management features.

Source
Postman: What are the free plan limits?

Free plan allows: 1 user only, 25 collection runs per month, 1,000 API calls/month, and 1,000 mock server calls/month. No CI/CD integration or advanced security features.

Source
Postman: Does Postman work with other development tools?

Postman integrates with Git repositories, offers a Node.js runner (Newman) for automation, and connects with popular CI/CD platforms. Teams using git-native workflows may prefer alternatives like Bruno.

Source
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