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. | It is a web monitoring tool that keeps you up to date and up to speed. If you're looking to keep track of updates on any website or social platform, it is the tool you need. |
One-click sign in;Fast checks;Email/SMS alerts;Online reports;Accepts bitcoin;API;SSL Testing | Easy content selection from any webpage;
Highlighted changes;
Change history;
Supported actions:
- Email
- SMS
- Sound
- Pop-up
- Push notification on phones
- Webhook;
An inbox style Watchlist to manage monitors |
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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.

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!

It monitors your website, dashboards, API's, and more and alerts your team when downtime happens. We also give you a Status Page which keeps your customers looped in and improves transparency.

Receive alerts when your website or API is down through emails, Slack or SMS, integrated with real time data and insights

It is an all in one uptime monitoring tool which monitors your URL from 10 locations around the globe ensuring that if your website ever goes down again, you get alerted within 60 seconds. It comes with advanced capabilities like SSL Monitoring, Advanced Alerting and more.

Modern uptime and performance monitoring for websites and APIs, with rich reporting, flexible alerting, and competitive pricing. More than just HEAD requests: choose an HTTP method, headers, and body for any request.
web-alert.io is a simple uptime and API monitoring service built for developers, indie hackers, and small SaaS teams who want clear, reliable alerts without enterprise complexity. It monitors websites and API endpoints, sends instant downtime alerts, checks SSL certificates, and tracks response times — all inside a clean, minimal dashboard. Setup takes under a minute, and there’s a free plan included. Perfect for small projects, micro-SaaS, client sites, and devs who just want to know when something is down.

Whether you have one site, or twenty, Vigil is a simple and reliable service for monitoring the uptime and performance of your websites. View all your sites on our beautiful client dashboards, get email and push notifications when there is a problem, and receive weekly email summary reports that let you know how your sites are doing over the long-term.