Ethan Galstad creates a simple MS-DOS application designed to “ping” Novell Netware servers and send numeric pages. The application is designed using external third-party applications to perform the server checks and send pages. The basic architectural concept that will be used for Nagios is born.
Considering getting in to the hosted monitoring/managed services business, Ethan uses the ideas and architecture of his earlier work to begin building a new and improved application designed to run under Linux.
Ethan releases his work as an open-source project under the name “NetSaint.” He estimates there might be approximately one dozen other people who might be interested in the application.
The plugins that were originally distributed as a part of the NetSaint distribution are soon spun off as a separate Nagios Plugins project.
Due to trademark issues with the name “NetSaint” that could have a long-term impact, Ethan decides to rename the project to “Nagios,” which was a recursive acronym for “Nagios Ain’t Gonna Insist On Sainthood.” The NetSaint Plugins project development is moved to the Nagios Plugins project.
Nagios is SourceForge.net Project of the Month (POTM) in June.
Nagios is rated by eWeek Labs as one of several enterprise-class “Must Have Tools”.
Nagios is mentioned as one of the “Hot Companies in Open Source” to watch in Michal Moe’s “Finding the Next Starbucks” – even though there isn’t a company yet.
Ethan founds Nagios Enterprises, LLC to provide consulting and development services around Nagios.
Nagios is a finalist in the “Best Tool or Utility for SysAdmins” category of the SourceForge.net Community Choice Awards.
Nagios wins the LinuxQuestions.org 2007 “Network Monitoring Application of the Year” award.
LinuxWorld.com rates Nagios as one of the “Top 5 Open Source Security Tools in the Enterprise.”
eWeek rates Nagios as one of “The Most Important Open Source Apps of All Time.”
Nagios makes the front cover of Information Week magazine titled “The Open Source Enterprise.”
Nagios wins the LinuxQuestions.org 2008 “Network Monitoring Application of the Year” award for a second year in a row.
Nagios is honored as being one of Infoworld’s Best of Open Source Software (“BOSSIE”) 2008 Award winners. Nagios won the “Server Monitoring” category.
Nagios is downloaded directly from SourceForge.net over 500,000 times.
Annual support contracts are officially offered for the first time from Nagios Enterprises.
Nagios Enterprises releases its first commercial monitoring product, Nagios XI.
Nagios wins the Linux Journal Reader’s Choice 2009 award for “Favorite Linux Monitoring Application.”
Nagios is a finalist in the SourceForge.net Community Choice Awards 2009 for “Best Tool or Utility for SysAdmins.”
Nagios wins the LinuxQuestions.org 2009 “Network Monitoring Application of the Year” award for a third year in a row.
Infoworld names Nagios as one of the Best of Open Source Software (“BOSSIE”) 2009 Award winners. This was the second year in a row that Nagios achieved such an honor.
Nagios is renamed Nagios Core.
Nagios Core is downloaded directly from SourceForge.net over 600,000 times.
Nagios wins the LinuxQuestions.org 2010 “Network Monitoring Application of the Year” award for the fourth year in a row.
Nagios wins the Linux Journal 2010 Readers’ Choice Award for “Best Monitoring Application.”
Nagios wins the LinuxCon 2010 poll for “Favorite IT Operations Tools.”
Nagios Fusion is released as a central monitoring server dashboard
Nagios BPI is released to monitor business processes.
The first Nagios World Conference is held in Saint Paul, MN (USA).
Nagios wins the LinuxQuestions.org 2011 “Network Monitoring Application of the Year” award for the fifth year in a row.
Nagios wins the Linux Journal 2011 Readers’ Choice Award for “Best Monitoring Application.”
Nagios wins the PortalProgramas 2011 Open Source Award in the “Essential for Communications Networks” category.
Nagios is awarded “Best Web Tool” by WebHostingSearch.com.
Nagios is listed in the SecTools.org list of top 125 security tools.
NSTI is released to manage SNMP traps.
Nagios Incident Manager is released.
The second Nagios World Conference is held in Saint Paul, MN (USA).
Nagios wins the LinuxQuestions.org 2012 “Network Monitoring Application of the Year” award for the sixth year in a row.
Nagios wins the Linux Journal 2012 Readers’ Choice Award for “Best Monitoring Application.”
Nagios was a featured project on SourceForge.net.
Nagios Network Analyzer is released to provide in-depth analysis of network traffic patterns.
NCPA is released to provide an extensible, cross-platform monitoring agent.
Nagios Core 4 is released.
The third Nagios World Conference is held in Saint Paul, MN (USA).
Nagios wins the LinuxQuestions.org 2013 “Network Monitoring Application of the Year” award for the seventh year in a row.
Nagios wins the Linux Journal 2013 Readers’ Choice Award for “Best Monitoring Application.”
Nagios has been installed over 8 million times since 2008.
Nagios Named St. Paul’s Hidden Gem in Tech{dot}MN
Nagios announces that the Nagios Plugin team is undergoing some changes, including the introduction of a new maintainer.
Nagios wins the LinuxQuestions.org 2014 “Network Monitoring Application of the Year” award for the eighth year in a row.
The fourth Nagios World Conference is held in Saint Paul, MN (USA).
Nagios Log Server is released to provide enterprise-class log monitoring and management.
Nagios XI 5 arrives with over 200 enhancements and improvements.
Nagios wins the LinuxQuestions.org 2015 “Network Monitoring Application of the Year” award for the ninth year in a row.
Nagios Log Server was selected first runner-up in ShowNet’s product section of Best of Show Award of Interop Tokyo 2015.
The fifth Nagios World Conference is held in Saint Paul, MN (USA).
Nagios Core surpasses 7,500,000 downloads directly from SourceForge.net.
Nagios wins SourceForge Community “Project of the Month” for October 2016.
Nagios Core is awarded "Network Monitoring Application of the Year" from LinuxQuestions.org. This is the 11th year in a row Nagios earns the award.
Nagios Log Server 2 is released with 47 improvements, additions, and updates.
The 2017 Nintern Program starts up.
Nagios experiences significant growth with over 1,200 software downloads per day.
Nagios XI is awarded "Network Monitoring Application of the Year" from LinuxQuestions.org. This is the 12th year in a row Nagios earned the award.
Linux.com lists Nagios as one of the “4 Must-Have Tools for Monitoring Linux”.
The 2018 Nintern Program starts up.
Nagios XI is awarded "Network Monitoring Application of the Year" from LinuxQuestions.org. This is the 13th year in a row Nagios earned the award.
Ethan steps down and hires a new CEO.
Nagios Core is awarded "Network Monitoring Application of the Year" from LinuxQuestions.org. This is the 14th year in a row Nagios earned the award.
Nagios is listed as a Top Performer in Application Performance Management Software on FeaturedCustomers.com.
Nagios shifts to a work-from-home model in response to the COVID-19 pandemic.
Nagios Core is awarded "Network Monitoring Application of the Year" from LinuxQuestions.org. This is the 15th year in a row Nagios earned the award.
Nagios is listed as a "Top Performer in Application Performance Management Software" on FeaturedCustomers.com.
Nagios Core is listed as one of the “Best Server Monitoring Software & Tools for 2021”.
Nagios Enterprises begins the renovation project during the Covid-19 pandemic as people returned to work in a hybrid model.
Nagios Enterprises revamped customer access to the Nagios support portal.
Nagios is listed as a "Top Performer in Application Performance Management Software" on FeaturedCustomers.com.
Ethan resumes his position as CEO.
2022 Nintern program starts up.
Nagios is listed as a Top Performer in Application Performance Management Software on FeaturedCustomers.com.
2024R1 versions of Nagios XI, Nagios Log Server, Nagios Network Analyzer, and Nagios Fusion were released with major updates to each.
Nagios Enterprises celebrates its 25th Anniversary. Our longest-standing customers are recognized with a small token of appreciation.
Nagios XI celebrates its 15th Anniversary.
Nagios is listed as one of the “8 Best Network Monitoring Tools of 2024” by Datamation.
Nagios Core surpasses 8,500,000 downloads directly from SourceForge.net.
Nagios Library site is relaunched to include articles, tools, documentation, and educational resources on Nagios Products.
The first iteration of Nagios CSP is released to the Nagios Community.
The Nagios World Conference is starting again. It will take place on September 29 - October 2 in Minneapolis, MN. The 2025 Conference will feature speakers from around the world that cover topics related to monitoring and broader IT issues.
Nagios is trusted by 10K+ customers.
2025 Nintern Program starts up.
Nagios grows to 100 employees.
Nagios is listed as one of the “Top 10 Best Server Monitoring Tools in 2025” by Cyber Security News.
Nagios is listed as one of the “Leading vendors' share in the IT infrastructure monitoring software market worldwide in 2025” from Statistica.
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