Which OpenNMS Distribution is right for you?
OpenNMS is delivered as two different, completely open source, distributions: Meridian and Horizon. Both are built from the same open-source code base, each with its own release cycle and available support options.
OpenNMS Horizon
Updated on a rapid release schedule, is freely available to download, and contains the newest features developed for the platform.
Free to download
Latest technology as soon as it’s available
Monthly security patches, quarterly feature updates
Community forum and chat support
Community members may contribute via Pull Requests to the GitHub repository
Licensed under the Affero General Public License (AGPLv3)
OpenNMS Meridian
For enterprises looking for a stable network management solution with long-term support.
Annual subscription cost for first Core instance
Proven and battle-tested Horizon features
Monthly security patches, annual feature updates
Several long term support options available from The OpenNMS Group
Curated and developed by The OpenNMS Group
Offered via RPMs Red Hat Enterprise Linux and CentOS
Licensed under the Affero General Public License (AGPLv3)
Who should use Horizon
Organizations who want to try out the latest OpenNMS features as early as possible.
Groups developing a proof of concept or evaluating OpenNMS as a monitoring platform.
Sponsors of new features being developed by The OpenNMS Group.
Who should use Meridian
Organizations looking for long-term support for OpenNMS.
Anyone running OpenNMS in production environments.
Users looking for frustration-free updates and a more streamlined upgrade experience.