If you use Yammer or LinkedIn to help with task management or hiring, chances are you weren't the one who discovered them, according to a new survey.

Using online responses from over 1,200 companies, the study revealed that 70% of small and medium-sized businesses actively use business apps that were introduced by employees.

Some apps were more likely to be introduced by employees than others, the survey found. Nearly 69% of social apps and 52% of cloud-storage apps, including Dropbox and Google Drive, made their way to the office via employees.

Workers were less inclined to introduce productivity apps such as Evernote and Google Drive (39%) and collaboration apps including Skype (44%) into their small business.

“As with the ‘bring-your-own-device’ trend before it, we’re seeing an increasing number of businesses embracing the rise of employee-introduced applications entering the workplace, in spite of the inherent security concerns,” LogMeIn senior vice president of products Andrew Burton said in a statement.

That’s not to say that SMBs aren’t worried about potential security breaches: 67% of SMB IT personnel polled said data security is a primary factor limiting adoption of employee-introduced apps while 77% said they were most concerned about security risks of cloud-based storage apps.

Still, concern doesn’t always translate into actual safety. According to a previous study by the National Cyber Security Alliance, 83% of small business owners lack an official security plan for cyber threats including viruses and spyware.