Yes, both KissFront and SolarWinds Pingdom offer a Free Trial.
KissFront is designed for Medium Business and Small Business.
SolarWinds Pingdom is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of SolarWinds Pingdom begins at $10/Month when Billed Yearly, while pricing details for KissFront are unavailable.
Some top alternatives to KissFront includes PageCheck, Wattspeed, GTmetrix, Uptrends, SolarWinds Pingdom, Hexometer, Pingt.io, Beacon, PageWatch and Speedrank.
Some top alternatives to SolarWinds Pingdom includes Freshping, Uptime, Pingmeter, SolarWinds ipMonitor, Visualping, pingnow.io, Epic Ping, PingPing, Pingt.io and PingSphere.