Availability History See when StumbleUpon was not working in the past
Discussion Write about your issues with StumbleUpon
We tracked StumbleUpon since January 29, 2018. During last 30 days, it has not been down. The average response time is 0.152 sec which is very good. Note that response time may vary depending on how far you are from the Stumbleupon.com server located in Santa Clara, United States.