| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Network Monitoring | 8.7 (#9) | 7.8 (#26) |
| Founded | 2000 | 1994 |
| License | The monitor-core repository lists the BSD-3-Clause license. | MRTG is available under the GNU General Public License. |
| Purpose | Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. | MRTG monitors traffic load on network links and generates HTML pages with PNG images showing that traffic. |
| Scale | The project profile says Ganglia has been used across thousands of clusters and can scale to clusters with 2,000 nodes. | The documentation says MRTG can monitor 200 or more network links from a halfway decent UNIX box. |
| Support | The project profile points users to its wiki, IRC channel, and public mailing lists for community help. | The maker lists user, announcement, and developer mailing lists, plus Usenet and IRC discussion channels. |