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swap_horiz Nagios Alternatives

Looking for alternatives to Nagios? Compare the top Web Pagetest options ranked by our AI scoring system.

You're looking at alternatives to:
Nagios

Nagios

Web Pagetest Open Source Self Hosted Alerting Uptime Infrastructure Monitoring

Nagios is an open-source monitoring software application that allows administrators to monitor the availability, performance, and health of their servers, networks, applications, and services through automated checks and alerts.

7.9 Good

apps Top Nagios Alternatives

The top alternative to Nagios in 2026 is Downdetector with a score of 8.4/10, followed by Better Stack Uptime (8.3) and Prometheus Blackbox Exporter (8.3).

1
Downdetector

Downdetector

Downdetector is an independent website that monitors real-time reports of service outages and technical issues submitted...

Public Outage Crowdsourced Uptime
8.4 Great
2
Better Stack Uptime

Better Stack Uptime

Better Stack Uptime is a tool that analyzes website performance by monitoring uptime, page load times, and key metrics a...

Monitoring SAAS Incident Uptime
8.3 Great
3
Prometheus Blackbox Exporter

Prometheus Blackbox Exporter

The Prometheus Blackbox Exporter is a standalone HTTP service that collects detailed performance metrics from web server...

Monitoring Open Source Uptime Prometheus
8.3 Great
4
Sitespeed.io

Sitespeed.io

Sitespeed.io is an open-source toolkit for measuring and improving website performance by analyzing various metrics like...

Performance Monitoring Open Source Self Hosted
8.2 Great
5
Zabbix

Zabbix

Zabbix is an open-source monitoring software platform that collects and visualizes system metrics – including server per...

Open Source Self Hosted Alerting Infrastructure Monitoring
8.2 Great
6
Oh Dear

Oh Dear

Oh Dear is a free online tool that analyzes website loading speed by simulating real browser performance and measuring k...

Performance Monitoring Uptime Alerts
8.1 Great
7
PRTG Network Monitor

PRTG Network Monitor

PRTG Network Monitor is a software solution that allows network administrators to monitor various aspects of their IT in...

Monitoring Enterprise Network Infrastructure
8.0 Great
8
Elastic Synthetics

Elastic Synthetics

Elastic Synthetics is a technology that uses machine learning to identify and automatically fix performance bottlenecks...

Open Source Observability Synthetic Monitoring Elastic
7.7 Good
9
Uptime.com

Uptime.com

Uptime.com is a website monitoring service that tracks the availability and performance of websites and applications by...

Monitoring Enterprise Synthetic Uptime
7.5 Good
10
Cronitor

Cronitor

Cronitor is an automated website performance monitoring tool that continuously tests websites from multiple global locat...

Monitoring Synthetic Uptime Alerts
7.5 Good
11
Honeybadger

Honeybadger

Honeybadger is an open-source, real-time performance monitoring tool that analyzes website speed and identifies critical...

SAAS Alerting Uptime Cron Monitoring
7.5 Good
12
Updown.io

Updown.io

Updown.io is a free online tool that analyzes website loading speed by simulating real browser connections and measuring...

Free Simple Monitoring Uptime
7.4 Good
13
Icinga

Icinga

Icinga is an open-source monitoring solution that uses agents and sensors to collect system metrics and proactively aler...

Open Source Self Hosted Alerting Uptime
7.4 Good
14
Gatus

Gatus

Gatus is an open-source tool that analyzes website performance by measuring the time it takes for various resources – li...

Open Source Self Hosted Health Check Uptime
7.4 Good
15
Smokeping

Smokeping

Smokeping is an open-source network monitoring tool that utilizes ICMP echo requests to measure the latency and response...

Open Source Self Hosted Network Monitoring Latency
7.4 Good
16
Site24x7 Website Monitoring

Site24x7 Website Monitoring

Site24x7 Website Monitoring provides real-time insights into website performance by tracking key metrics like page load...

Performance Monitoring Zoho Web
7.3 Good
17
Monit

Monit

Monit is an open-source, real-time website monitoring tool that analyzes website performance metrics like load time, upt...

Lightweight Open Source Self Hosted Infrastructure
7.2 Good
18
GlitchTip

GlitchTip

GlitchTip is a platform that allows website creators to receive direct financial support from their audience through mic...

Open Source Self Hosted Uptime Error Monitoring
6.6 Fair
19
Statping-ng

Statping-ng

Statping-ng is an open-source, command-line tool designed to measure and report on the performance of websites by analyz...

Monitoring Open Source Self Hosted Uptime
6.4 Fair
20
InternetVista

InternetVista

InternetVista is a free online tool that measures website loading speed and performance by simulating a user’s connectio...

Monitoring SAAS Europe Alerting
5.7 Mediocre

summarize Quick Comparison Summary

Alternative Score vs Nagios Action
Downdetector
Downdetector
Web Pagetest Public Outage Crowdsourced
8.4 Great +0.5 Compare
Better Stack Uptime
Better Stack Uptime
Web Pagetest Monitoring SAAS Incident
8.3 Great +0.4 Compare
Prometheus Blackbox Exporter
Prometheus Blackbox Exporter
Web Pagetest Monitoring Open Source Uptime
8.3 Great +0.4 Compare
Sitespeed.io
Sitespeed.io
Web Pagetest Performance Monitoring Open Source
8.2 Great +0.3 Compare
Zabbix
Zabbix
Web Pagetest Open Source Self Hosted Alerting
8.2 Great +0.3 Compare
Oh Dear
Oh Dear
Web Pagetest Performance Monitoring Uptime
8.1 Great +0.2 Compare
PRTG Network Monitor
PRTG Network Monitor
Web Pagetest Monitoring Enterprise Network
8.0 Great +0.1 Compare
Elastic Synthetics
Elastic Synthetics
Web Pagetest Open Source Observability Synthetic Monitoring
7.7 Good -0.2 Compare
Uptime.com
Uptime.com
Web Pagetest Monitoring Enterprise Synthetic
7.5 Good -0.4 Compare
Cronitor
Cronitor
Web Pagetest Monitoring Synthetic Uptime
7.5 Good -0.4 Compare

See all Web Pagetest ranked by score

emoji_events View Full Web Pagetest Rankings

help Frequently Asked Questions

What are the best alternatives to Nagios?
The top alternatives to Nagios in 2026 include Downdetector, Better Stack Uptime, Prometheus Blackbox Exporter, Sitespeed.io, Zabbix. Each offers unique features and is objectively scored on Lunoo to help you compare.
How does Nagios compare to its competitors?
Our AI-powered comparison system analyzes features, pricing, user reviews, and expert opinions to provide objective scores. Nagios scores 7.9/10. Click any alternative above to see a detailed side-by-side comparison.
Is Nagios worth it in 2026?
Nagios scores 7.9/10 in the Web Pagetest category. We recommend comparing it with the 20 alternatives listed above to find the best fit for your needs.
What is the best free alternative to Nagios?
Several alternatives to Nagios offer free plans or free tiers. Check the alternatives listed above and visit their websites to compare pricing and free options.
Why should I switch from Nagios?
Common reasons users look for Nagios alternatives include pricing, specific feature gaps, better integration needs, or simply exploring newer options. Our objective scoring helps you compare without bias.
How many alternatives to Nagios are there?
Lunoo currently lists 20 scored alternatives to Nagios in the Web Pagetest category, ranked by our AI-powered evaluation system.
Which Nagios alternative has the highest rating?
Downdetector currently holds the highest rating among Nagios alternatives with a score of 8.4/10.
Can I use Downdetector instead of Nagios?
Downdetector is one of the top-rated alternatives to Nagios. While they serve similar purposes in the Web Pagetest space, each has distinct strengths. Use our comparison tool above for a detailed side-by-side analysis.
What is the cheapest alternative to Nagios?
Pricing varies among Nagios alternatives. We recommend checking each alternative's website for current pricing. Many options in the Web Pagetest category offer free tiers or competitive pricing.
How are Nagios alternatives ranked on Lunoo?
Lunoo uses an AI-powered scoring system that analyzes category fit, feature coverage, pricing signals, public reception, recency, and value to provide 0 to 10 scores. Rankings are updated continuously.
Nagios vs Downdetector: which is better?
Nagios scores 7.9/10 while Downdetector scores 8.4/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
Nagios vs Better Stack Uptime: which is better?
Nagios scores 7.9/10 while Better Stack Uptime scores 8.3/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.
Nagios vs Prometheus Blackbox Exporter: which is better?
Nagios scores 7.9/10 while Prometheus Blackbox Exporter scores 8.3/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.

category Explore Related Categories

Open Source Self Hosted Alerting Uptime Web Pagetest Infrastructure Monitoring

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