The website TechCrunch said the app "already looks like a privacy nightmare."

"Information about your company, your role on your team, your job history, and your performance evaluations may be collected and sent to third parties," the website Quartz noted in assessing factors that might keep the app from being deployed in Europe.

The site also warned that Threads can collect information about "sexual orientation, race and ethnicity, biometric data, trade union membership, pregnancy status, politics, and religious beliefs."

"This data may potentially be sent to 'service providers' and 'analytics partners,' which is often code for third-party advertising and marketing firms," the site warned.