Meta CEO Mark Zuckerberg, TikTok CEO Shou Zi Chew, X/Twitter CEO Linda Yaccarino, Snap CEO Evan Spiegel, and Discord CEO Jason Citron spoke at the committee.
The tech leaders appeared before lawmakers to answer questions on the steps their companies are taking to keep children safe online.
Meta, Facebook's parent company, was predicted to be a central focus of the hearing.
The California-based tech giant has been sued by several states that allege it knowingly and deliberately designed features on Instagram and Facebook to make them addictive to children, and has not protected them from online predators.
Thirty-three states filed a lawsuit in federal court in California, claiming that Meta collects data on children under 13 without their parents’ consent, in violation of federal law.
Nine attorneys general are filing lawsuits in their respective states.
In a statement, Meta said it shares “the attorneys general’s commitment to providing teens with safe, positive experiences online, and have already introduced over 30 tools to support teens and their families.”