The world’s most popular broadband bandwidth speed testing network is getting on the social bandwagon, starting Monday.

Speedtest.net, which had 165 million unique users in 2010, is now offering a way for users to sign up, save their results, share them with friends, create shared tests, and even win badges.

Doug Suttles, the founder of Ookla, the service’s parent company, said he resisted the idea for a long time, arguing that as a utility there was no need to have a login system.

“Users strong-armed us into it,” Suttles said. “But we did add it and with good reason. Users can now log in, and th...