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Nagios XI vs Vector

Nagios XI logo

Nagios XI

Logging

Enterprise-grade monitoring solution with advanced visualization and reporting

From
Free
Free plan
Yes
Visit Nagios XIFull review
Vector logo

Vector

Logging

A Lightweight and Ultra-Fast Tool for Building Observability Pipelines

From
Free
Free plan
Yes
Visit VectorFull review

The short version

  • Vector is free; Nagios XI starts at $2595/mo.
  • Where Nagios XI falls short: free Edition caps at 7 nodes or 100 services, whichever limit is hit first.
  • Where Vector falls short: free and open source under the MPL-2.0 license, backed by an open source community with a public GitHub repo.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Nagios XI and Vector actually diverge.

Attributes where Nagios XI and Vector differ
AttributeNagios XIVector
Pricing modelOne-timeOpen-source
PlatformsWebWeb, API

Identical on both: starting price (Free), free tier (Yes), category (Logging).

Not yet recorded: founded for Nagios XI.

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 Nagios XI

Nothing recorded that Vector does not also cover.

Only in Vector

  • Log collection
  • Metrics collection
  • Trace collection
  • Event transformation
  • API
  • Webhooks
  • REST
  • Web support

What people use each for

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

Nagios XI

  • Monitoring servers, networks, and IoT devices for status changesnot Vector
  • Detecting infrastructure problems before they cause outagesnot Vector
  • Creating customizable dashboards for real-time IT visibilitynot Vector
  • Tracking SLA compliance and generating capacity planning reportsnot Vector

Vector

  • Log monitoringnot Nagios XI
  • Application performancenot Nagios XI
  • Security analyticsnot Nagios XI
  • Troubleshootingnot Nagios XI

Where each one falls short

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

Nagios XI

  • Free Edition caps at 7 nodes or 100 services, whichever limit is hit first
  • Standard Edition is licensed per node count, starting at $2,595 for 100 nodes and rising to $14,995 for 1,000 nodes
  • Enterprise Edition, which adds capacity planning and SLA reporting, is sold as an add-on starting at $4,690 for 100 nodes on top of the base license
  • Sitewide Edition for large distributed environments has no published price and requires contacting sales

Vector

  • Free and open source under the MPL-2.0 license, backed by an open source community with a public GitHub repo

Pricing, plan by plan

Nagios XI

Free
  • Free EditionFree
    • 7 nodes OR 100 services limit
    • Self-supported only
  • Standard 100-Node$2,595 one-off
    • 100 nodes
    • First year includes support and upgrades
  • Standard 500-Node$8,295 one-off
    • 500 nodes
    • First year includes support and upgrades
  • Standard 1000-Node$14,995 one-off
    • 1,000 nodes
    • First year includes support and upgrades

Vector

Free
  • FreeFree
    • Log collection
    • Metrics collection
    • Trace collection

Which should you pick?

Choose Nagios XI if

  • You want to start without paying.
Nagios XI review

Choose Vector if

  • You need log collection.
  • You want to start without paying.
  • You work on Web, API.
  • You also want metrics collection.
Vector review

Questions people ask

Is Nagios XI or Vector better?
Neither clearly leads. Nagios XI starts at Free and Vector at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nagios XI or Vector?
Nagios XI starts at Free and Vector at Free.
Does Nagios XI or Vector run on more platforms?
Nagios XI runs on Web. Vector runs on Web, API.
Can I use Nagios XI for free?
Both have a free tier, so you can try either at no cost before committing.
What is Nagios XI best used for?
Nagios XI is most often used for monitoring servers, networks, and iot devices for status changes, detecting infrastructure problems before they cause outages, creating customizable dashboards for real-time it visibility, tracking sla compliance and generating capacity planning reports. Of those, monitoring servers, networks, and iot devices for status changes and detecting infrastructure problems before they cause outages are not what Vector is typically brought in for.
What can Nagios XI do that Vector cannot?
Vector covers Log collection, Metrics collection, Trace collection, Event transformation.

Answered from the vendors’ own pages

Nagios XI: What is Nagios XI's pricing model?

Nagios XI uses perpetual licensing with one-time purchase costs based on node count, ranging from $2,595 for 100 nodes to $14,995 for 1,000 nodes.

Source
Vector: Is Vector free to download and use?

Yes, Vector is free and open source. The software is available across multiple platforms including Linux (various distributions), macOS, and Windows through direct downloads, package managers, containers, and source code.

Source
Nagios XI: Is there a free version of Nagios XI?

Yes, Nagios XI Free Edition is available at no cost with a limit of 7 nodes or 100 services, whichever is reached first.

Source
Vector: What license does Vector use?

Vector is distributed under the Mozilla Public License (MPL 2.0). This license applies uniformly across all Vector releases.

Source
Nagios XI: What is included with Nagios XI licensing?

Initial licenses include one year of free version upgrades, up to 10 support cases, and support portal access. Each license permits three installations: production, backup/failover, and testing/development.

Source
Vector: Can I use Vector for commercial purposes without paying?

Vector appears to have no built-in paid tier distinction and is offered as unified open-source software. However, commercial support options or enterprise services may exist beyond the open-source distribution.

Source
Vector: Is there paid support or enterprise licensing available for Vector?

The Vector documentation and download pages do not specify commercial support tiers or enterprise licensing options. Such information would require contacting the Vector/Datadog team directly.

Source
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