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There's a free plan; paid tiers are quoted.
Nagios XI Free Edition costs $0 per month, with a limit of 7 nodes or 100 services, whichever comes first. A 30-day free trial is listed. For larger environments, Standard Edition and Enterprise Edition use one-time perpetual licenses priced by node tier, not monthly subscriptions. Each paid license includes the first year of Maintenance & Support and unlimited services per licensed node. Costs rise as the licensed node tier grows; 2,000+ nodes requires contacting sales.
01Every plan, line by line
| Plan | Billed annually | Billed monthly | Built for |
|---|---|---|---|
| Standard Edition | — | Quote | Teams monitoring up to 2,000+ nodes |
| Enterprise Edition | — | Quote | Teams needing Enterprise features |
| Free Edition | $0 | $0 | Small environments with limited monitoring needs |
Add-ons and overages
- Standard Edition Enterprise add-on: $2,095
- Maintenance & Support renewal prices and overage costs are not published
02What the plan grid doesn't tell you
Support renewals
The first year of Maintenance & Support is included with paid licenses. Renewal prices are not published; ask for the annual cost before purchase.
Enterprise add-on
The Enterprise add-on for Standard Edition costs $2,095, in addition to the Standard Edition license.
Overage terms
Overage costs are not published. Confirm what happens if your monitored environment exceeds its licensed node tier.
Self-hosting infrastructure
Plan for the server and operations needed to run a self-hosted monitor; Nagios does not publish infrastructure costs here.
03Which plan should you buy?
| If you are… | Get | Why |
|---|---|---|
| Small lab or side project | Free Edition | It costs $0 per month, but stops at 7 nodes or 100 services, whichever comes first. |
| Production team under 1,000 nodes | Standard Edition | One-time tiers range from $2,595 for 100 nodes to $14,995 for 1,000 nodes. |
| Team needing Enterprise features | Enterprise Edition | It adds the Enterprise tier, with one-time prices from $4,690 for 100 nodes to $17,090 for 1,000. |
04Is Nagios XI worth the money?
Nagios XI can be worth paying for when a team needs its dashboards and configuration tools around a Nagios monitoring setup, and can budget for a perpetual license by node tier. Standard Edition is the lower-cost paid path; Enterprise Edition costs more, and the Standard Edition Enterprise add-on is $2,095. Free Edition is enough for a small environment within its 7-node or 100-service ceiling. Before approving a paid tier, get Maintenance & Support renewal and overage terms in writing.
Nagios XI pricing FAQ
How much does Nagios XI cost for 100 nodes?
Standard Edition costs $2,595 for 100 nodes. Enterprise Edition costs $4,690 for 100 nodes. Both are one-time perpetual licenses that include the first year of Maintenance & Support.
Is Nagios XI Free Edition limited by nodes or services?
Free Edition supports up to 7 nodes or 100 services, whichever comes first. Its price is $0 per month. The user-seat limit is not published.
Does Nagios XI charge monthly or annually?
Paid editions are one-time perpetual licenses priced by node tier, not monthly or annual subscriptions. The first year of Maintenance & Support is included; renewal prices are not published.
What does Nagios XI cost for 2,000 nodes?
The published pricing directs buyers to contact sales for 2,000+ nodes in both Standard Edition and Enterprise Edition. Ask for the license price, support renewal, and any overage terms for your deployment.