Nagios XI pricing: license cost, yearly renewal and the Enterprise add-on
A Nagios XI license is perpetual, and the bill is not. Put in your node count and how long you plan to run it, and the calculator picks the license, adds every yearly renewal and shows what each node really costs.
Nagios XI total cost calculator
LiveLicense and renewal prices read from nagios.com/pricing-plans and nagios.com/maintenance-support-plans, USD list. Year one includes Maintenance and Support; every later year adds the renewal for your license size, plus $1,066 on Enterprise. The Linux server, its upkeep and the admin time are not included.
How much does Nagios XI cost?
Nagios XI Standard costs $2,595 for 100 nodes, $4,395 for 200, $6,195 for 300, $7,295 for 400, $8,295 for 500, $11,495 for 750 and $14,995 for 1,000. The license is perpetual, but only the first year of Maintenance and Support is included, and the renewal runs between 79% and 84% of the license price every year after that: $2,104 a year at 100 nodes, $11,898 at 1,000. So a 100-node license costs $6,803 over three years and $11,011 over five, 4.2 times the sticker. The Enterprise edition is the same ladder plus a flat $2,095 at every size.
Most summaries of Nagios XI pricing stop at the license table, and several still quote an entry price of $2,495, which is not what the pricing page shows today. The bigger omission is the renewal. Nagios publishes it on a separate page, and it changes the shape of the purchase from a one-off capital cost into a yearly bill that settles at about four fifths of the original price. Everything below is read from the vendor's own pages, with the arithmetic shown.
The short version
- Entry license
- 100 nodes, $2,595 perpetual
- Yearly renewal from year two
- $2,104 at 100 nodes, 79% to 84% of the license on every tier
- Five years, 100 nodes
- $11,011, or 4.2 times the sticker
- Enterprise edition
- A flat $2,095 more at any size, $1,066 more a year to renew
- Free edition
- 7 nodes or 100 services, no support
- Above 1,000 nodes
- No published price, sales quote only
Every Nagios XI license tier, with the renewal Nagios prints on another page
Nagios splits its numbers across two pages: the license on the pricing page, the yearly Maintenance and Support renewal on the support page. Put them in one table and add the per-node columns, and you can see what a tier costs to buy and what it costs to keep.
| Nodes | Standard license | Enterprise license | Yearly renewal | Renewal as % of license | License per node | Renewal per node, year |
|---|---|---|---|---|---|---|
| 100 | $2,595 | $4,690 | $2,104 | 81.1% | $25.95 | $21.04 |
| 200 | $4,395 | $6,490 | $3,466 | 78.9% | $21.98 | $17.33 |
| 300 | $6,195 | $8,290 | $4,955 | 80.0% | $20.65 | $16.52 |
| 400 | $7,295 | $9,390 | $5,947 | 81.5% | $18.24 | $14.87 |
| 500 | $8,295 | $10,390 | $6,939 | 83.7% | $16.59 | $13.88 |
| 750 | $11,495 | $13,590 | $9,196 | 80.0% | $15.33 | $12.26 |
| 1,000 | $14,995 | $17,090 | $11,898 | 79.3% | $15.00 | $11.90 |
Two limits frame the card. At the bottom, the free license stops at 7 nodes or 100 services, and the next step is the 100-node license: there is nothing in between, so a 12-host shop pays the same $2,595 as a 99-host one. At the top, Nagios publishes 1,000 nodes and then "2000-Node+, Contact Sales", which leaves 1,001 to 1,999 nodes with no listed price at all. Services are unlimited on paid licenses, so adding checks to a host you already license costs nothing.
A perpetual Nagios XI license costs about 80% of itself again every year
"Perpetual" means the installation keeps running if you stop paying. It does not mean you stop paying. The first year of Maintenance and Support comes with the license, and from year two Nagios says renewal "is required to maintain this feature set": version updates, security patches, up to 10 support cases a year, and the Premium Features (single sign-on through Azure AD, the Mod-Gearman interface and the premium wizards). Very few production teams run a monitoring server for years without patches, so in practice the renewal is part of the price.
| Nodes, Standard | Year one | Three years | Five years | Five years as a multiple of the license | Per node per year, over five years |
|---|---|---|---|---|---|
| 100 | $2,595 | $6,803 | $11,011 | 4.24x | $22.02 |
| 200 | $4,395 | $11,327 | $18,259 | 4.15x | $18.26 |
| 300 | $6,195 | $16,105 | $26,015 | 4.20x | $17.34 |
| 400 | $7,295 | $19,189 | $31,083 | 4.26x | $15.54 |
| 500 | $8,295 | $22,173 | $36,051 | 4.35x | $14.42 |
| 750 | $11,495 | $29,887 | $48,279 | 4.20x | $12.87 |
| 1,000 | $14,995 | $38,791 | $62,587 | 4.17x | $12.52 |
The ratio is not a formula. It lands on exactly 80% at 300 and 750 nodes and drifts between 78.9% and 83.7% elsewhere, so treat "about four fifths" as a planning figure and read the exact renewal for your tier from the table. Budget the way the money actually leaves: the license as a one-off in year one, the renewal as an operating line every year after, and a five-year total that is roughly four times the number on the pricing page.
It also changes the comparison with subscription tools. Nagios XI looks far cheaper than a subscription in year one, and the gap narrows sharply from year two, because you are then paying a subscription-sized renewal on top of a license you already bought. Our PRTG pricing breakdown carries the other side of that comparison, and the two are priced against each other at five network sizes in Nagios XI vs PRTG pricing.
Nagios XI Enterprise costs a flat $2,095 more at every size
Subtract each Standard price from its Enterprise price and you get the same number seven times: $2,095. Nagios describes Enterprise as "available as an add-on to any Nagios XI license level", and the arithmetic confirms it is priced exactly that way, as one fixed fee that does not scale with nodes. The renewal behaves the same: a single $1,066 a year on top of the Standard renewal, whatever the size.
At 100 nodes: +80.7%
$2,595 becomes $4,690. For a small estate, Enterprise nearly doubles the license and adds half as much again to every renewal.
At 500 nodes: +25.3%
$8,295 becomes $10,390. The same feature set now costs a quarter of the license rather than most of it.
At 1,000 nodes: +14.0%
$14,995 becomes $17,090. At the top of the card, Enterprise is a small line item on a large purchase.
What the $2,095 buys: SLA reports, Business Process Intelligence, capacity planning, scheduled reports, bulk modification tools and audit logs. The decision therefore depends almost entirely on size. A large estate that needs scheduled SLA reporting gets it cheaply. A 100-node team is paying 81% more for reporting features, and should check whether the SLA numbers it needs could come from somewhere it already pays for. Over five years, Enterprise at 100 nodes totals $17,370 against $11,011 for Standard.
The cheapest Nagios XI nodes are numbers 401 to 500
Average price per node falls steadily down the card, which is what you would expect. The marginal price, what each extra block of nodes costs, does not. It falls to a low between 400 and 500 nodes and then climbs again.
| Step | Extra license cost | License per extra node | Renewal per extra node, year |
|---|---|---|---|
| 100 to 200 nodes | $1,800 | $18.00 | $13.62 |
| 200 to 300 nodes | $1,800 | $18.00 | $14.89 |
| 300 to 400 nodes | $1,100 | $11.00 | $9.92 |
| 400 to 500 nodes | $1,000 | $10.00 | $9.92 |
| 500 to 750 nodes | $3,200 | $12.80 | $9.03 |
| 750 to 1,000 nodes | $3,500 | $14.00 | $10.81 |
If you are sizing a license at 400 nodes, 500 costs $1,000 more (13.7%) and renews for $992 a year more, which is the best value step on the card. Past 500 the extra nodes get more expensive: $12.80 each up to 750, then $14.00 each up to 1,000, and the renewal ladder shows the same rise at the top ($9.03, then $10.81 per node a year). Two independent price lists bending the same way at the same point is the reason to treat it as a real feature of the card rather than a rounding quirk.
What Nagios XI is worth paying for, and where a node is the wrong unit
Nagios XI is a capable infrastructure monitor. It runs on your own Linux server, uses agents and plugins to watch servers, switches, services, databases and applications inside your network, and at $12.52 a node a year over five years on the 1,000-node license it is reasonable money for a large estate. If that is the job, the node model fits it.
Public websites and APIs are where the unit stops fitting. Nagios defines a node two slightly different ways: "any unique IP or web URL" on its pricing page, and "any unique IP address or fully qualified domain name" on its product page. Under the first reading, twenty URLs on one domain could be twenty nodes; under the second, one. Ask Nagios sales which applies to your setup before you size a license around web checks. Either way, those checks run from wherever your Nagios server sits, usually inside the network whose public reachability you are trying to prove.
| The job | Nagios XI | An external uptime tool |
|---|---|---|
| Servers, switches, services, disk and CPU | Built for exactly this | Cannot see inside your network |
| Is the public site reachable from outside | Checks from wherever the Nagios server runs | Checks from several regions by default |
| Billing unit | Per node, in blocks of 100 and up | Per monitor, one per URL or endpoint |
| 100 sites for five years | $11,011 if each site is a node, plus the server | $1,740 on UptimeHub Pro, billed yearly |
| Server you have to run | A Linux host you patch and back up | None |
| Public status page for customers | Internal dashboards, not a customer-facing page | Included on every UptimeHub plan |
The two are not substitutes, and the honest recommendation for most teams asking is to use both for what each does well. Keep Nagios XI for the estate, and move the public endpoint checks to UptimeHub, which checks sites, APIs, ports, SSL certificates and cron jobs from outside your network and powers a branded status page. If web checks are eating nodes today, moving them out can keep you on a smaller license at the next renewal.
Where these numbers come from, and what is deliberately not claimed
License prices, the Enterprise feature list and the free tier limits come from nagios.com/pricing-plans. The node and service definitions come from nagios.com/products/nagios-xi. The renewal ladder and the $1,066 Enterprise renewal come from nagios.com/maintenance-support-plans, which states that its prices took effect on January 1, 2026 and are subject to change. Every ratio, total and per-node figure on this page is arithmetic on those published numbers.
Not asserted anywhere above: Sitewide pricing, anything above 1,000 nodes, reseller or multi-year discounts, bundles with Log Server or Network Analyzer, future renewal prices, and which of the two node definitions Nagios applies to URL checks. The five-year totals assume you renew every year at today's list and never change tier. They also exclude the Linux server, its upkeep and the administrator time a self-hosted monitor needs, which are real costs and vary too much between teams to put a number on.
Nagios XI pricing questions
How much does Nagios XI cost?
Nagios XI Standard costs $2,595 for 100 nodes and rises to $14,995 for 1,000 nodes, as a perpetual license with the first year of maintenance included. After that the annual Maintenance and Support renewal runs $2,104 at 100 nodes up to $11,898 at 1,000. Enterprise adds a flat $2,095 to any license, and above 1,000 nodes the price is a sales quote.
Is Nagios XI a one-time purchase?
The license is perpetual, but the cost is not one-time. Only the first year of Maintenance and Support comes with the purchase, and renewing it costs 79% to 84% of the original license price every year. Over five years a 100-node license comes to $11,011, which is 4.2 times the $2,595 sticker.
How much is the Nagios XI renewal?
The annual Maintenance and Support renewal for Nagios XI is $2,104 for 100 nodes, $3,466 for 200, $4,955 for 300, $5,947 for 400, $6,939 for 500, $9,196 for 750 and $11,898 for 1,000. Enterprise renewal is an additional $1,066 at every size. Nagios lists these as effective from January 1, 2026 and subject to change.
What is the difference between Nagios XI Standard and Enterprise?
Enterprise is an add-on to any Standard license that brings SLA reports, Business Process Intelligence, capacity planning, scheduled reports, bulk modification tools and audit logs. It costs a flat $2,095 on top of the license at every node count, so it adds 80.7% to a 100-node license and only 14.0% to a 1,000-node one.
Is Nagios XI free?
There is a free Nagios XI license capped at 7 nodes or 100 services, whichever you reach first, with most Standard features and no support. There is also a 30-day trial. Beyond 7 nodes the smallest paid license is 100 nodes at $2,595, so there is no small paid step between the free tier and the entry license.
What counts as a node in Nagios XI?
A node, also called a host, is a unique thing you monitor, and paid licenses place no limit on the number of services (checks) you run against it. Nagios words the definition two ways on two pages: "any unique IP or web URL" on its pricing page and "any unique IP address or fully qualified domain name" on its product page. If you monitor many URLs on one domain, confirm which applies before you size a license.
What happens if I do not renew Nagios XI maintenance?
The perpetual license keeps the installation you already have, but you stop receiving version updates and security patches, lose case support, and lose the Premium Features that Nagios ties to an active maintenance plan: single sign-on through Azure AD, the Mod-Gearman interface and the premium configuration wizards.
How much does Nagios XI cost per node?
The license works out to $25.95 a node at 100 nodes and $15.00 at 1,000. Counted over five years with renewals, the real cost is $22.02 a node a year at 100 nodes and $12.52 at 1,000. The cheapest block to add is going from 400 to 500 nodes, at $10.00 a node, after which extra nodes get more expensive again.
What is the difference between Nagios Core and Nagios XI?
Nagios Core is the free open-source monitoring engine. Nagios XI is the commercial product built on top of it, adding the web interface, configuration wizards, a database, dashboards, reporting and an API, with vendor support. You pay for XI to avoid hand-editing Core configuration files and to get a supported product.
Is Nagios XI worth it for website monitoring?
Only as a side job next to infrastructure monitoring. Nagios XI is built to watch servers, switches, services and applications inside your network, and there it earns its price. For public websites and APIs it checks from wherever your Nagios server sits, usually inside the network you are trying to prove is reachable, and every site you add uses a licensed node.
Your Nagios server cannot tell you the site is down for customers
A monitor inside your own network is the one place that can almost always reach you. UptimeHub checks your sites, APIs and ports from outside, every 30 seconds on Pro and above, with auto-retry so one blip does not page anyone, watches SSL and domain expiry alongside the endpoint, and includes a branded status page on every plan.
Related breakdowns
PRTG pricing per sensor and device
The other self-hosted infrastructure monitor on most shortlists, where the license name counts sensors, not devices.
Uptime monitoring pricing compared
Every major external monitoring vendor in one table, sorted by billing model.
Monitoring from more than one location
Why a single server inside your own network cannot answer the question a customer is asking.