Site24x7 Website Monitoring
7.3#10 in internet performance monitoring softwareFrom $9 a monthFree planAndroidiOSWebAPI
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It suits teams that need website availability and content checks alongside monitoring options such as DNS, synthetic transactions, or real-user monitoring. Private On-Premise Pollers are relevant for teams monitoring internal sites behind firewalls.
It suits people and teams who need availability monitoring for websites, servers, or other services, with alerts and status pages. The free plan is described for hobby and non-profit projects; Solo is positioned for freelancers and small sites.