Munin

Single window to look for hardware statistics and application monitoring. Easy to configure, and a lot of stuff is available online related to its configuration. However, the team at Munin should work on the mobile applications as well and also look for bundling professional services at a cost. That will be helpful for startups to hook to Munin instead of running across websites for the integration.

• Hardware stats.
• Application stats.
• Ease of admin.
• Simple interface.

• Mobile application.
• Pre builtin modules for unix, cisco, hp devices.
• Alert Notifications over SMS and call.
• Web hook integrations with Slack, pagerduty etc.

Ease of admin and relatively easy to configure. People have been using it for decades, so the market is well aware of its functionality, and you will get answers to most of the questions or problems. Community support is also there to seek advice. In a nutshell, people are well aware, and it's stable.