Most uptime tools are built to impress on a feature list - PingBoard is built to get out of your way. Clean dashboard, no noise, just the information you actually need.
What's different: realtime public status pages your users can actually trust, 5 monitor types including heartbeat monitoring, and an interface that doesn't make you hunt for basic actions.
Built because I was tired of opening UptimeRobot and feeling overwhelmed. Sometimes simpler is the feature.