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Website down checker to see if a site is down, offline, or having problems. Detect outages from 8 global regions and confirm if it is down for everyone or just you. | Free uptime monitoring that tests what matters. Monitor APIs, validate responses, test multi-step workflows, and verify real browser logins. |
Website Down Checker | Browser Login Checks, Multi-Step API Monitoring, Response Body Validation, JSON Path Assertions, Failure Screenshots, Email Alerts, Slack Alerts, Webhook Alerts, PagerDuty Integration, Free Commercial Use |
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Pingdom is an uptime monitoring service. When problems happen with a site that Pingdom monitors, it immediately alerts the owner so the problem can be taken care of.

Better Stack is a radically better infrastructure monitoring platform that calls the right person on your team if anything goes wrong. Schedule on-call duties, receive helpful alerts, and collaborate on solving incidents faster than ever.

PagerDuty is an alarm aggregation and dispatching service for system administrators and support teams. It collects alerts from your monitoring tools, gives you an overall view of all of your monitoring alarms, and alerts an on duty engineer if there's a problem.

It is all about helping you to keep your websites up. It monitors your websites every 5 minutes and alerts you if your sites are down.

Monitoring a website is one thing – finding the best way to alert you to downtime another. At StatusCake we give you as many options as possible to decide when & how often you’re contacted. Whether it’s by email, SMS, push notifications for iOS & Android or integration with third party apps including Zapier and PagerDuty – you decide how you want to be alerted and when!

updown is an online service that checks your website's status by periodically sending an HTTP HEAD request to the URL of your choice. It then notifies you by email or sms when your website is not responding correctly.

Catch visual bugs in static & dynamic UI components with Percy. Ensure your website’s UI reliability in dynamic environments. Detect and resolve bugs at speed for each component across browsers and viewports.

VictorOps is a real-time incident management platform that combines the power of people and data to embolden DevOps teams so they can handle incidents as they occur and prepare for the next one.

OpsGenie is a cloud-based service for dev & ops teams, providing reliable alerts, on-call schedule management, and escalations. OpsGenie integrates with monitoring tools & services and ensures that the right people are at the right time.

It lets you create and manage UI tests that check specific functionality in your website or application. We execute these automated browser tests continuously from the cloud and alert you if anything breaks.