It all started with the desire to create a useful and available tool for the web community. After some time, the service grew so much, we spent lots of hours improving it and learned a lot.

No, they are not. Most analytics services (like Google Analytics) use JavaScript to collect data and Thedowntime's requests don't trigger JavaScript.

Firstly, please, make sure all our IPs are whitelisted on your end and by your provider. If there are still any issues, you can try removing the monitor and creating it again. This will change the IP address of your monitor. If there's a "Connection Timeout", take a look at the Response Times graph and see if there are some longer responses. The monitor will be marked as down after 45 seconds of not being able to reach your URL. My glitch.me/com, Heroku, or similar monitor is not working Glitch.me, for example, is preventing ping services from reaching their servers and keeping their apps awake.

Http(s): it's perfect for website monitoring. The service regularly sends requests (which are the same as if a visitor is browsing your website) to the URL and decides if it is up or down depending on the HTTP statuses returned from the website (200-success, 404-not found, etc.)

Ping: this is good for monitoring a server. Ping (ICMP) requests are sent and up/down status is decided according to the "if responses are received or not". Ping is not a good fit for monitoring websites as a website (its IP) can respond to ping requests while it is down (which means that the site is down but the server hosting the site is up)

Port: good for monitoring services like SMTP, DNS, POP as all these services run from a specific port and Thedowntime decides their statuses if they respond to the requests or not