US Sen. John Thune (R-S.D.), the Committee's chairman, said the companies would have to "explain their approaches to privacy," but also how they plan to address the GDPR privacy legislation that recently went into effect in the European Union, but also the privacy law recently approved in the state of California.
"Consumers deserve clear answers and standards on data privacy protection," said Thune.
The Committee will also take suggestions from the six companies on "what Congress can do to promote clear privacy expectations without hurting innovation."
Companies are not legally required to attend these meetings. Google had been called to answer questions in front of the Senate Intelligence Committee at the start of the month, together with Facebook and Twitter, but declined.
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