Yes, both Grafana and Splunk On-Call offer a Free Trial.
Grafana is designed for Large Enterprises, Medium Business and Small Business.
Splunk On-Call is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Grafana Starts at $49/Month whereas for Splunk On-Call Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Grafana includes iDashboards, DataHero, Databox, Klipfolio Dashboard, Prometheus, Splunk Cloud, SensorCloud, Chartbrew, SharpDash and Quickmetrics.
Some top alternatives to Splunk On-Call includes Freshservice, PagerDuty, Opsgenie, VictorOps, AlertOps, Spike.sh, opsmanager, Zenduty, StatusCast Incident Management and PagerTree.