Yes, both BoltAPI and OnWebChange offer a Free Trial.
BoltAPI is designed for Individuals, Large Enterprises, Medium Business and Small Business.
OnWebChange is designed for Large Enterprises, Medium Business and Small Business.
Pricing details for both BoltAPI and OnWebChange are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to BoltAPI includes CHEQ.ONLINE, Super Monitoring, DevMonitor.io, UpTime.onl, Odown, updown.io, Uptrends, Domain Monitor, PingPing and Pingt.io.
Some top alternatives to OnWebChange includes Distill, Super Monitoring, PageCheck, Pagescreen, Dotcom Monitor, Uptrends, Visualping, PageCrawl, LinkUpdater and PageWatch.