How to remove your Klout account
First, remove any third party logins using the instructions below
Once you click on that link, you will then see the section called “opting out of Klout”. You can opt-out by logging into your account and then clicking http://klout.com/corp/optout. You will be removed from Klout.com in 24-48 hours.
Thanks to Andreas of Klout.com for pointing this out.
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for Klout using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Klout. Click here to find out how.