Yes, both Uptime and WatchSumo offer a Free Trial.
Uptime is designed for Large Enterprises, Medium Business and Small Business.
WatchSumo is designed for Medium Business and Small Business.
Pricing for Uptime Starts at $15/Month when Billed Yearly whereas for WatchSumo Starts at $7/Month.
Some top alternatives to Uptime includes Uptime Robot, Super Monitoring, Dotcom Monitor, DevMonitor.io, UpTime.onl, Odown, Downtime Monkey, SiteUptime, updown.io and SolarWinds Pingdom.
Some top alternatives to WatchSumo includes Uptime, Super Monitoring, UpTime.onl, Netumo, Uptrends, pingnow.io, WebForce Uptime, Pingt.io and Statsignal.