Portuguese digital rights group D3 filed collective lawsuits against Meta Platforms, ByteDance, and Alphabet in Lisbon’s Civil Court, accusing Facebook, Instagram, TikTok, and YouTube of deploying design features that foster platform addiction, according to court disclosures made public on Thursday. The four collective actions target engagement-driven mechanics such as infinite scrolling and algorithmic recommendations.
Portuguese Digital Rights Group Targets Big Tech Design
According to D3, the lawsuits were filed by the law firm Andersen Tax & Legal Iberia between April and May. The legal actions were kept under wraps until the conclusion of the judicial summer break. The litigation targets Meta’s Facebook and Instagram, ByteDance’s TikTok, and Alphabet’s YouTube, seeking to hold the tech giants accountable for user safety, as reported by Reuters journalist Sergio Goncalves.
The legal challenge focuses on specific platform mechanics designed to extend user sessions. D3 pointed to features including infinite scrolling, video autoplay, persistent notifications, and hyper-personalized recommendation systems. By eliminating natural pauses in user activity and continuously feeding tailored material, the platforms construct behavioral feedback loops that D3 compares to techniques historically utilized by the gambling industry.
“Platforms do not have to be hyper-addictive,” D3 President Ricardo Lafuente said, according to the Reuters report. “A healthy, productive and educational social media ecosystem is possible, but only if the rules are robust, properly enforced and directed at those who persist in ignoring them.”
Broader Regulatory Scrutiny Across Atlantic Markets
The Portuguese litigation arrives amid mounting international pressure on social media architecture. Regulatory bodies and courts on both sides of the Atlantic are increasingly scrutinizing features engineered to maximize user retention. According to Reuters, TikTok faced formal charges under European Union rules in February over allegedly addictive features. Meanwhile, Meta Platforms agreed in August to pay up to $18 billion to resolve separate addiction-related legal claims within the United States.
Data compiled by the website SocialMediaTransparency.org indicates the scale of the platforms involved. The four targeted applications recorded a combined reach of 33 million monthly users in Portugal during the first half of 2026.
Responses and Next Steps in Lisbon Court
Representatives for Meta Platforms, ByteDance, and Alphabet did not immediately respond to requests for comment from Reuters following the public disclosure of the filings. Under Portuguese civil procedure, collective actions permit associations to initiate legal proceedings on behalf of a broader consumer base, allowing the court to examine systemic design choices rather than isolated user experiences.