# Nagios XI vs Paessler PRTG Comparison - What are their main differences? At a Glance Star Rating **Nagios XI** [ 4.5/5(58) ](https://www.g2.com/products/nagios-xi/reviews#reviews) **Paessler PRTG** [ 4.7/5(211) ](https://www.g2.com/products/paessler-prtg/reviews#reviews) Market Segments **Nagios XI** Mid-Market (66.7% of reviews) **Paessler PRTG** Mid-Market (49.2% of reviews) Pros & Cons **Nagios XI** [ Comprehensive Monitoring (2) ](https://www.g2.com/products/nagios-xi/reviews?filters%5Bsentiment_snippet%5D=1702158&qs=pros-and-cons#reviews)[ All-in-One Solution (1) ](https://www.g2.com/products/nagios-xi/reviews?filters%5Bsentiment_snippet%5D=2194553&qs=pros-and-cons#reviews)[ Complex Configuration (1) ](https://www.g2.com/products/nagios-xi/reviews?filters%5Bsentiment_snippet%5D=1701961&qs=pros-and-cons#reviews)[ Complex Setup (1) ](https://www.g2.com/products/nagios-xi/reviews?filters%5Bsentiment_snippet%5D=1701917&qs=pros-and-cons#reviews) **Paessler PRTG** [ Ease of Use (76) ](https://www.g2.com/products/paessler-prtg/reviews?filters%5Bsentiment_snippet%5D=1244076&qs=pros-and-cons#reviews)[ Monitoring (63) ](https://www.g2.com/products/paessler-prtg/reviews?filters%5Bsentiment_snippet%5D=1243640&qs=pros-and-cons#reviews)[ Expensive (30) ](https://www.g2.com/products/paessler-prtg/reviews?filters%5Bsentiment_snippet%5D=2064633&qs=pros-and-cons#reviews)[ Slow Performance (29) ](https://www.g2.com/products/paessler-prtg/reviews?filters%5Bsentiment_snippet%5D=2064601&qs=pros-and-cons#reviews) Entry-Level Pricing **Nagios XI** No pricing available **Paessler PRTG** **Free Trial** 10000 Sensors Per Year Summary AI Generated Summary AI-generated. Powered by real user reviews. - **G2 reviewers report** that Paessler PRTG excels in user experience, particularly with its **Auto-Discovery** feature, which allows users to quickly map out network dependencies. One user mentioned being able to point PRTG at a subnet, grab a coffee, and return to a nearly complete network map, showcasing its efficiency in setup. - **Users say** that Nagios XI offers a straightforward implementation process, making it easy to set up and use. Reviewers appreciate its flexibility in monitoring various infrastructure components, which is particularly beneficial for organizations with diverse IT environments. - **According to verified reviews** , Paessler PRTG stands out for its ability to create sensors that reflect business impact rather than just raw metrics. Users highlighted how they could monitor critical systems like ERP, ensuring that their monitoring efforts align with business priorities. - **Reviewers mention** that while Nagios XI is compatible with a wide range of endpoints and monitoring protocols, it sometimes lacks the depth of customization that PRTG offers. Users noted that PRTG allows for the creation of custom EXE sensors to pull live data from legacy systems, which can be crucial for specific operational needs. - **G2 reviewers highlight** that Paessler PRTG has a higher overall satisfaction score compared to Nagios XI, reflecting its strong performance in areas like ease of use and setup. Users appreciate the intuitive interface and the ability to manage multiple networks seamlessly. - **Users report** that while both tools provide solid support, Paessler PRTG has a slight edge in quality of support, with reviewers noting prompt responses and helpful resources. This can be a significant factor for teams that rely on timely assistance for their monitoring needs. Pricing Entry-Level Pricing **Nagios XI** Nagios XI No pricing available **Paessler PRTG** Paessler PRTG Free Trial Free Trial 10000 Sensors Per Year 30 Day Full Access Free Trial 100% Free. No Credit Card Required Free Version After the Trial - Free Full Features for 30 days [Browse all 7 pricing plans](/products/paessler-prtg/pricing) Free Trial **Nagios XI** Nagios XI Free Trial is available **Paessler PRTG** Paessler PRTG Free Trial is available Ratings Meets Requirements 9.4 47 9.4 185 Ease of Use 8.9 46 9.1 185 Ease of Setup 7.0 14 9.0 167 Ease of Admin 7.5 10 8.9 132 Quality of Support 8.8 46 8.9 170 Has the product been a good partner in doing business? 8.2 10 8.9 124 Product Direction (% positive) 9.2 46 9.1 174 Features by Category Database Monitoring[Hide 63 FeaturesShow 63 Features](javascript:void(0);) Not enough data 9.0 31 Functionality Monitoring Not enough data 9.5(won by default) 29 Alerting Not enough data 9.6(won by default) 30 Logging Not enough data 8.9(won by default) 29 Response Time Not enough data 8.8(won by default) 29 Reporting Not enough data 8.6(won by default) 29 Data Visualization Not enough data 8.7(won by default) 29 Performance Monitoring Not enough data Not enough data Real-Time Monitoring Not enough data Not enough data Server Monitoring Not enough data Not enough data Real-Time Reporting Not enough data Not enough data Uptime Reporting Not enough data Not enough data Transaction Monitoring Not enough data Not enough data Real-Time Data Not enough data Not enough data Agentic AI - Database Monitoring Autonomous Task Execution Not enough data Not enough data Multi-step Planning Not enough data Not enough data Cross-system Integration Not enough data Not enough data Adaptive Learning Not enough data Not enough data Natural Language Interaction Not enough data Not enough data Proactive Assistance Not enough data Not enough data Decision Making Not enough data Not enough data Third-Party Integrations Not enough data Not enough data Capacity Planning Not enough data Not enough data Additional Functionality Resource Management Not enough data Not enough data Anomaly Detection Not enough data Not enough data Visual Analytics Not enough data Not enough data Remote Monitoring & Management Not enough data Not enough data Secure Data Storage Not enough data Not enough data Dashboard Not enough data Not enough data Generative AI Not enough data Not enough data Configuration Management Not enough data Not enough data API Not enough data Not enough data User Management Not enough data Not enough data Capacity Management Not enough data Not enough data Diagnostic Tools Not enough data Not enough data Dependency Tracking Not enough data Not enough data Troubleshooting Not enough data Not enough data Reporting & Statistics Not enough data Not enough data Reporting/Analytics Not enough data Not enough data Predictive Analytics Not enough data Not enough data Audit Management Not enough data Not enough data Real-Time Notifications Not enough data Not enough data Application Management Not enough data Not enough data Data Storage Management Not enough data Not enough data Application-Level Analysis Not enough data Not enough data Multitenancy Not enough data Not enough data Query Analysis Not enough data Not enough data Performance Management Not enough data Not enough data Access Controls/Permissions Not enough data Not enough data Compliance Management Not enough data Not enough data Historical Trend Analysis Not enough data Not enough data Alerts/Notifications Not enough data Not enough data Summary Reports Not enough data Not enough data AI Copilot Not enough data Not enough data Event Logs Not enough data Not enough data Dashboard Creation Not enough data Not enough data Automated Discovery Not enough data Not enough data Prioritization Not enough data Not enough data Issue Tracking Not enough data Not enough data Activity Dashboard Not enough data Not enough data Performance Metrics Not enough data Not enough data Resource Optimization Not enough data Not enough data Real-Time Analytics Not enough data Not enough data Status Tracking Not enough data Not enough data Network Monitoring[Hide 109 FeaturesShow 109 Features](javascript:void(0);) 9.1 42 8.1 88 Functionality Performance Monitoring 9.5(won by 0.1) 37 9.4 81 Alerting 9.1 37 9.2(won by 0.1) 79 Improvement Suggestions 8.8(won by 0.9) 36 7.9 73 Multi-Network Capability 9.1(tied score) 37 9.1(tied score) 71 Monitoring - Network Monitoring 360-Degree Network Visibility Not enough data 8.6(won by default) 38 Automated Network Discovery Not enough data 8.5(won by default) 44 Real-Time Monitoring Not enough data 9.0(won by default) 41 Bandwidth Monitoring Not enough data Not enough data IP Address Monitoring Not enough data Not enough data Server Monitoring Not enough data Not enough data Multi-Location Monitoring Not enough data Not enough data Management Performance Baseline 9.1(won by 0.2) 37 8.9 68 Data Visualization 8.8(tied score) 37 8.8(tied score) 72 Path Analysis 9.1(won by 1.1) 37 8.0 67 Real-Time Data Not enough data Not enough data Historical Trend Analysis Not enough data Not enough data Analytics - Network Monitoring Predictive Performance Analytics Not enough data 7.7(won by default) 38 Packet & Flow Analysis Not enough data 7.5(won by default) 39 Security - Network Monitoring Encrypted Data Transmission Not enough data 8.2(won by default) 38 Zero Trust and Identity Management Not enough data 7.6(won by default) 37 Integrated Network Security Not enough data 7.1(won by default) 38 Service Level Agreement (SLA) Management Not enough data Not enough data Asset Lifecycle Management Not enough data Not enough data Application Management Not enough data Not enough data Configuration Management Not enough data Not enough data Data Storage Management Not enough data Not enough data Calendar Management Not enough data Not enough data Workflow Management Not enough data Not enough data Compliance Management Not enough data Not enough data Inventory Management Not enough data Not enough data Remote Monitoring & Management Not enough data Not enough data Capacity Management Not enough data Not enough data Change Management Not enough data Not enough data User Management Not enough data Not enough data Configuration Management Not enough data Not enough data User Management Not enough data Not enough data Remote Monitoring & Management Not enough data Not enough data Capacity Management Not enough data Not enough data Compliance Management Not enough data Not enough data Service Level Agreement (SLA) Management Not enough data Not enough data Remediation Management Not enough data Not enough data Network Resource Management Not enough data Not enough data Patch Management Not enough data Not enough data Network Performance - Network Monitoring Dynamic Network Optimization Not enough data 7.5(won by default) 38 Automated Tasks Routing Not enough data 7.2(won by default) 39 AI Automation - Network Monitoring Machine Learning-Based Anomaly Detection Not enough data 5.7(won by default) 37 Self-Healing Networks Not enough data 5.5(won by default) 37 Predictive Network Maintenance Not enough data 5.8(won by default) 37 Agentic AI - Network Monitoring Autonomous Task Execution Not enough data 7.8(won by default) 9 Multi-step Planning Not enough data 8.3(won by default) 9 Cross-system Integration Not enough data 8.0(won by default) 9 Adaptive Learning Not enough data 7.8(won by default) 9 Natural Language Interaction Not enough data 7.4(won by default) 9 Proactive Assistance Not enough data 8.3(won by default) 9 Decision Making Not enough data 8.8(won by default) 8 Third-Party Integrations Not enough data Not enough data Additional Functionality Audit Trail Not enough data Not enough data Collaboration Tools Not enough data Not enough data Generative AI Not enough data Not enough data Mobile Access Not enough data Not enough data AI Copilot Not enough data Not enough data Configurable Workflow Not enough data Not enough data Data Extraction Not enough data Not enough data Risk Assessment Not enough data Not enough data Charting Not enough data Not enough data Compliance Tracking Not enough data Not enough data Reporting & Statistics Not enough data Not enough data Self-Updating Maps Not enough data Not enough data IT Asset Tracking Not enough data Not enough data Dependency Tracking Not enough data Not enough data Data Import/Export Not enough data Not enough data Data Connectors Not enough data Not enough data Drag & Drop Not enough data Not enough data Map Exporting Not enough data Not enough data API Not enough data Not enough data Color Codes/Icons Not enough data Not enough data Uptime Reporting Not enough data Not enough data Document Storage Not enough data Not enough data Activity Dashboard Not enough data Not enough data Scheduling Not enough data Not enough data Event Logs Not enough data Not enough data Customizable Reports Not enough data Not enough data Web Traffic Reporting Not enough data Not enough data Downtime Tracking Not enough data Not enough data Threshold Alerts Not enough data Not enough data Simple Network Management Protocol (SNMP) Not enough data Not enough data Access Controls/Permissions Not enough data Not enough data Troubleshooting Not enough data Not enough data Maintenance Scheduling Not enough data Not enough data Network Mapping Not enough data Not enough data Performance Metrics Not enough data Not enough data Dashboard Not enough data Not enough data Search/Filter Not enough data Not enough data Vulnerability Scanning Not enough data Not enough data Virtualization Not enough data Not enough data Baseline Manager Not enough data Not enough data Real-Time Notifications Not enough data Not enough data Mobile Alerts Not enough data Not enough data Alerts/Escalation Not enough data Not enough data Bug/Issue Capture Not enough data Not enough data Mobile Network Troubleshooting Not enough data Not enough data Issue Auditing Not enough data Not enough data Customizable Dashboard Not enough data Not enough data Email Alerts Not enough data Not enough data Anti Virus Not enough data Not enough data Diagnostic Tools Not enough data Not enough data Remote Update/Installation Not enough data Not enough data Remote Access/Control Not enough data Not enough data Workflow Automation Not enough data Not enough data Cloud Infrastructure Monitoring[Hide 20 FeaturesShow 20 Features](javascript:void(0);) Not enough data 8.1 29 Monitoring Usage Monitoring Not enough data 8.8(won by default) 27 Database Monitoring Not enough data 8.0(won by default) 25 API Monitoring Not enough data 7.8(won by default) 24 Real-Time Monitoring - Cloud Infrastructure Monitoring Not enough data 9.0(won by default) 26 Security and Compliance Monitoring Not enough data Not enough data Administration Activity Monitoring Not enough data 8.6(won by default) 27 Multi-Cloud Management Not enough data 7.5(won by default) 24 Automation Not enough data 6.9(won by default) 25 Auto-Scaling & Resource Optimization Not enough data Not enough data Analysis Reporting Not enough data 8.4(won by default) 27 Dashboards and Visualizations Not enough data 8.6(won by default) 26 Spend Forecasting and Optimization Not enough data 7.1(won by default) 24 Agentic AI - Cloud Infrastructure Monitoring Multi-step Planning Not enough data Not enough data Cross-system Integration Not enough data Not enough data Adaptive Learning Not enough data Not enough data Natural Language Interaction Not enough data Not enough data Proactive Assistance Not enough data Not enough data Decision Making Not enough data Not enough data AI Automation - Cloud Infrastructure Monitoring AI-Powered Anomaly Detection Not enough data Not enough data AI-Driven Insight Recommendations Not enough data Not enough data Hardware Monitoring[Hide 11 FeaturesShow 11 Features](javascript:void(0);) Not enough data 8.3 59 Visibility Dashboards and Visualizations Not enough data 8.8(won by default) 56 Alerts and Notifications Not enough data 9.2(won by default) 57 Reporting Not enough data 8.7(won by default) 53 Monitoring and Management Multi-Device Management Not enough data 8.5(won by default) 53 Automation Not enough data 8.0(won by default) 50 Performance Baseline Not enough data 8.2(won by default) 50 Real-Time Monitoring Not enough data 9.2(won by default) 56 Agentic AI - Hardware Monitoring Autonomous Task Execution Not enough data 7.3(won by default) 5 Cross-system Integration Not enough data Not enough data Proactive Assistance Not enough data 7.3(won by default) 5 Decision Making Not enough data 7.3(won by default) 5 Server Monitoring[Hide 86 FeaturesShow 86 Features](javascript:void(0);) 8.6 21 8.7 60 Visibility Activity Dashboard 8.5 18 9.1(won by 0.6) 57 Real-Time Notifications 9.0 18 9.3(won by 0.3) 58 Uptime Reporting 8.5 18 8.9(won by 0.4) 55 Customizable Dashboard Not enough data Not enough data Web Traffic Reporting Not enough data Not enough data Real-Time Reporting Not enough data Not enough data Risk Alerts Not enough data Not enough data Threshold Alerts Not enough data Not enough data Email Alerts Not enough data Not enough data Monitoring and Management Capacity Management 8.9(tied score) 18 8.9(tied score) 54 Automation Feature Not Available 8.0(won by default) 51 Performance Baseline 8.8(won by 0.3) 18 8.5 53 Bandwidth Monitoring 8.6 18 9.4(won by 0.8) 58 Immediate Alert Notification 8.9 9 9.2(won by 0.3) 51 Proactive Server Monitoring Software 9.0(won by 0.4) 8 8.6 48 Generative AI Not enough data Not enough data Audit Trail Not enough data Not enough data User Management Not enough data Not enough data Audit Management Not enough data Not enough data Issue Management Not enough data Not enough data Service Level Agreement (SLA) Management Not enough data Not enough data Configuration Management Not enough data Not enough data Incident Management Not enough data Not enough data Patch Management Not enough data Not enough data Compliance Management Not enough data Not enough data Remote Monitoring & Management Not enough data Not enough data Inventory Management Not enough data Not enough data Policy Management Not enough data Not enough data CPU Monitoring Not enough data Not enough data Network Monitoring Not enough data Not enough data Real-Time Analytics Not enough data Not enough data Server Monitoring Not enough data Not enough data Email Monitoring Not enough data Not enough data Performance Monitoring Not enough data Not enough data Asset Lifecycle Management Not enough data Not enough data Workflow Management Not enough data Not enough data Data Storage Management Not enough data Not enough data Credential Management Not enough data Not enough data Password Management Not enough data Not enough data Virtual Machine Monitoring Not enough data Not enough data Monitoring Not enough data Not enough data Database Monitoring Not enough data Not enough data Cloud environment support Server Monitoring For Cloud Deployments 7.6 9 8.3(won by 0.7) 41 Software Scaling 8.1 9 8.3(won by 0.2) 43 Agentic AI - Server Monitoring Autonomous Task Execution Not enough data 8.6(won by default) 6 Multi-step Planning Not enough data 8.6(won by default) 6 Cross-system Integration Not enough data 8.3(won by default) 6 Adaptive Learning Not enough data 8.6(won by default) 6 Natural Language Interaction Not enough data 8.3(won by default) 6 Proactive Assistance Not enough data 8.3(won by default) 6 Decision Making Not enough data 8.6(won by default) 6 Third-Party Integrations Not enough data Not enough data Capacity Planning Not enough data Not enough data Additional Functionality Authentication Not enough data Not enough data Secure Data Storage Not enough data Not enough data Role-Based Permissions Not enough data Not enough data AI Copilot Not enough data Not enough data Automatic Backup Not enough data Not enough data Reporting/Analytics Not enough data Not enough data Event Logs Not enough data Not enough data Maintenance Scheduling Not enough data Not enough data Trend Analysis Not enough data Not enough data Secure Login Not enough data Not enough data Drag & Drop Not enough data Not enough data Access Controls/Permissions Not enough data Not enough data Dashboard Creation Not enough data Not enough data SSL Security Not enough data Not enough data HIPAA Compliant Not enough data Not enough data Real-Time Updates Not enough data Not enough data Scheduling Not enough data Not enough data API Not enough data Not enough data Tagging Not enough data Not enough data Data Migration Not enough data Not enough data Self Service Portal Not enough data Not enough data Disaster Recovery Not enough data Not enough data Purchasing & Receiving Not enough data Not enough data Activity Tracking Not enough data Not enough data Automated Scheduling Not enough data Not enough data Reporting & Statistics Not enough data Not enough data Diagnostic Tools Not enough data Not enough data Status Tracking Not enough data Not enough data Customizable Reports Not enough data Not enough data Alerts/Escalation Not enough data Not enough data Visual Analytics Not enough data Not enough data Event Tracking Not enough data Not enough data Baseline Manager Not enough data Not enough data Enterprise Monitoring[Hide 15 FeaturesShow 15 Features](javascript:void(0);) 9.2 19 9.0 102 Functionality Diverse Systems Monitoring 9.4 14 9.5(won by 0.1) 77 Real-Time Analytics 9.0(tied score) 14 9.0(tied score) 61 Observability 9.2(won by 0.3) 14 8.9 57 AI/ML Integration Feature Not Available 7.1(won by default) 47 Management Single Pane of Glass 9.4(won by 0.3) 15 9.1 68 Dashboards and Visualization 8.9 14 9.2(won by 0.3) 71 Performance Baselines 9.2(won by 0.2) 14 9.0 52 Alerting 9.2 14 9.3(won by 0.1) 76 Agentic AI - Enterprise Monitoring Autonomous Task Execution Not enough data 9.1(won by default) 19 Multi-step Planning Not enough data 9.2(won by default) 18 Cross-system Integration Not enough data 9.3(won by default) 20 Adaptive Learning Not enough data 9.3(won by default) 19 Natural Language Interaction Not enough data 9.3(won by default) 19 Proactive Assistance Not enough data 9.3(won by default) 20 Decision Making Not enough data 9.1(won by default) 19 Application Performance Monitoring (APM)[Hide 54 FeaturesShow 54 Features](javascript:void(0);) 8.5 5 8.7 22 Monitoring Performance Baselines Not enough data 9.2(won by default) 19 Performance Analysis Not enough data 8.8(won by default) 19 Transaction Monitoring Not enough data 9.3(won by default) 19 AI/ML Assistance Feature Not Available 6.8(won by default) 19 Multi-System Monitoring Not enough data 9.3(won by default) 20 Generative AI Not enough data Not enough data Container Monitoring Not enough data Not enough data Response Dashboards and Visualization Not enough data 9.3(won by default) 20 Incident Alerting Not enough data 9.0(won by default) 20 Root Cause Analysis (RCA) Feature Not Available 8.5(won by default) 19 Trend Analysis Not enough data Not enough data Data Visualization Not enough data Not enough data Agentic AI - Application Performance Monitoring (APM) Autonomous Task Execution Not enough data Not enough data Cross-system Integration Not enough data Not enough data Adaptive Learning Not enough data Not enough data Proactive Assistance Not enough data Not enough data Decision Making Not enough data Not enough data Third-Party Integrations Not enough data Not enough data Performance Real User Monitoring (RUM) Feature Not Available 8.7(won by default) 21 Performance Metrics Feature Not Available 8.3(won by default) 21 Functionality Database Monitoring 9.0(won by 0.4) 5 8.6 21 Dynamic Transaction Mapping Feature Not Available 8.9(won by default) 21 Load Balancing Feature Not Available 8.4(won by default) 21 Cloud Observability 8.0 5 8.3(won by 0.3) 22 Server Monitoring Not enough data Not enough data Additional Functionality Real-Time Data Not enough data Not enough data Email Alerts Not enough data Not enough data Bottleneck Identification Not enough data Not enough data API Not enough data Not enough data Uptime Reporting Not enough data Not enough data Resource Management Not enough data Not enough data Dashboard Creation Not enough data Not enough data Data Import/Export Not enough data Not enough data Baseline Manager Not enough data Not enough data Issue Tracking Not enough data Not enough data Drag & Drop Not enough data Not enough data Reporting/Analytics Not enough data Not enough data Alerts/Notifications Not enough data Not enough data Prioritization Not enough data Not enough data Collaboration Tools Not enough data Not enough data Real-Time Reporting Not enough data Not enough data Application Management Not enough data Not enough data SSL Security Not enough data Not enough data Incident Management Not enough data Not enough data Access Controls/Permissions Not enough data Not enough data Status Tracking Not enough data Not enough data Audit Management Not enough data Not enough data Customizable Reports Not enough data Not enough data Diagnostic Tools Not enough data Not enough data Single Sign On Not enough data Not enough data Workflow Management Not enough data Not enough data AI Copilot Not enough data Not enough data Activity Tracking Not enough data Not enough data Event Logs Not enough data Not enough data Observability Software[Hide 49 FeaturesShow 49 Features](javascript:void(0);) Not enough data Not enough data Telemetry Collection & Ingestion - Observability Multi-Telemetry Ingestion Not enough data Not enough data OpenTelemetry Support Not enough data Not enough data Agentic AI - Observability Software Autonomous Task Execution Not enough data Not enough data Multi-step Planning Not enough data Not enough data Cross-system Integration Not enough data Not enough data Adaptive Learning Not enough data Not enough data Natural Language Interaction Not enough data Not enough data Proactive Assistance Not enough data Not enough data Decision Making Not enough data Not enough data AI/Machine Learning Not enough data Not enough data Third-Party Integrations Not enough data Not enough data Visualization & Dashboards - Observability Service Dependency Mapping Not enough data Not enough data Unified Dashboard Not enough data Not enough data Trace Visualization Not enough data Not enough data Activity Dashboard Not enough data Not enough data Correlation & Root Cause Analysis - Observability Cross-Telemetry Correlation Not enough data Not enough data Root Cause Detection Not enough data Not enough data Intelligent Alerting Not enough data Not enough data Scalability & Ecosystem Integration - Observability Kubernetes Monitoring Not enough data Not enough data Hybrid/Multi-Cloud Support Not enough data Not enough data Real-Time Monitoring Not enough data Not enough data Network Monitoring Not enough data Not enough data Container Monitoring Not enough data Not enough data Activity Monitoring Not enough data Not enough data AI Features - Observability Predictive Insights Not enough data Not enough data Generative AI Not enough data Not enough data AI Anomaly Detection Not enough data Not enough data Additional Functionality Vulnerability Management Not enough data Not enough data Load Balancing Not enough data Not enough data Asset Discovery Not enough data Not enough data AI Copilot Not enough data Not enough data Real-Time Data Not enough data Not enough data Incident Reporting Not enough data Not enough data Real-Time Analytics Not enough data Not enough data Threat Response Not enough data Not enough data Threat Intelligence Not enough data Not enough data Performance Metrics Not enough data Not enough data Alerts/Notifications Not enough data Not enough data Compliance Management Not enough data Not enough data Workflow Management Not enough data Not enough data Configuration Management Not enough data Not enough data Issue Tracking Not enough data Not enough data Reporting & Statistics Not enough data Not enough data Log Management Not enough data Not enough data Troubleshooting Not enough data Not enough data Incident Management Not enough data Not enough data Root Cause Analysis Not enough data Not enough data Prioritization Not enough data Not enough data Key Performance Indicators Not enough data Not enough data Reviews Reviewers' Company Size [![Nagios XI](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_c8f30c74b4cb6fab524c475638272801/nagios-xi.png "Nagios XI")](https://www.g2.com/products/nagios-xi/reviews) Nagios XI Small-Business(50 or fewer emp.) 11.8% Mid-Market(51-1000 emp.) 66.7% Enterprise(\> 1000 emp.) 21.6% [![Paessler PRTG](https://images.g2crowd.com/uploads/product/hd_favicon/a2a579fd907a69f718b760210205e122/paessler-prtg.svg "Paessler PRTG")](https://www.g2.com/products/paessler-prtg/reviews) Paessler PRTG Small-Business(50 or fewer emp.) 14.2% Mid-Market(51-1000 emp.) 49.2% Enterprise(\> 1000 emp.) 36.5% Small-Business (50 or fewer emp.) 11.8% 14.2% Mid-Market (51-1000 emp.) 66.7% 49.2% Enterprise (\> 1000 emp.) 21.6% 36.5% Reviewers' Industry [![Nagios XI](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_c8f30c74b4cb6fab524c475638272801/nagios-xi.png "Nagios XI")](https://www.g2.com/products/nagios-xi/reviews) Nagios XI Information Technology and Services 47.1% Internet 13.7% Computer & Network Security 7.8% Telecommunications 3.9% Insurance 3.9% Other 23.5% [![Paessler PRTG](https://images.g2crowd.com/uploads/product/hd_favicon/a2a579fd907a69f718b760210205e122/paessler-prtg.svg "Paessler PRTG")](https://www.g2.com/products/paessler-prtg/reviews) Paessler PRTG Information Technology and Services 33.5% Telecommunications 7.1% Computer & Network Security 4.6% Computer Software 3.0% Hospital & Health Care 2.5% Other 49.2% Alternatives **Nagios XI Alternatives** ![Checkmk](https://images.g2crowd.com/uploads/product/hd_favicon/541d0e65c6998d9d32df26ea47566f16/checkmk.svg "Checkmk") [ Checkmk ](/products/checkmk/reviews) ![Zabbix](https://images.g2crowd.com/uploads/product/hd_favicon/abbd2f816e62ae6c0ef1e71b70c35617/zabbix.svg "Zabbix") [ Zabbix ](/products/zabbix/reviews) ![OpManager Nexus](https://images.g2crowd.com/uploads/product/hd_favicon/45058b5199eda218487d0dd0a8c0c448/opmanager-nexus.svg "OpManager Nexus") [ OpManager Nexus ](/products/opmanager-nexus/reviews) ![Dynatrace](https://images.g2crowd.com/uploads/product/hd_favicon/1512659484/dynatrace.svg "Dynatrace") [ Dynatrace ](/products/dynatrace/reviews) **Paessler PRTG Alternatives** ![Checkmk](https://images.g2crowd.com/uploads/product/hd_favicon/541d0e65c6998d9d32df26ea47566f16/checkmk.svg "Checkmk") [ Checkmk ](/products/checkmk/reviews) ![Zabbix](https://images.g2crowd.com/uploads/product/hd_favicon/abbd2f816e62ae6c0ef1e71b70c35617/zabbix.svg "Zabbix") [ Zabbix ](/products/zabbix/reviews) ![Datadog](https://images.g2crowd.com/uploads/product/hd_favicon/1498834114/datadog.svg "Datadog") [ Datadog ](/products/datadog/reviews) ![Dynatrace](https://images.g2crowd.com/uploads/product/hd_favicon/1512659484/dynatrace.svg "Dynatrace") [ Dynatrace ](/products/dynatrace/reviews) ### Spotlight Categories - 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