TikTok's CEO, Shou Zi Chew, testified before Congress to dispel these concerns and prevent an outright ban or forced sale.
Chew stated that TikTok's parent company, ByteDance, is a private company and cannot be manipulated by any government.
TikTok has been building a firewall for the past two years, and data of 150 million US users will be stored in the US by the end of the year.
The app has third-party validators and researchers to review its source code and algorithms.
Lawmakers from both parties in Congress are working on legislation to give the President more power to crack down on TikTok.
The Committee on Foreign Investment in the US has reportedly told TikTok to part ways with ByteDance to avoid a US ban.
China's Commerce Ministry opposes the forced sale of TikTok and says it will damage investor confidence.