Stockholm-based startup DUIU has raised new funding in an undisclosed round, with backing from Alster Ventures and Greg Paull, who joins as the company’s first international strategic investor.

DUIU is building a social video platform where users reply to videos in ranked threads and compete for visibility through community voting. The company says the model is designed to move away from passive scrolling and toward participation-driven content systems.

The new capital will be used to support DUIU’s launch in Brazil, a major social video market, where the startup plans to validate its participation model ahead of wider international expansion.

The round comes as scrutiny grows around how algorithmic feeds shape attention and distribution on large consumer platforms, creating an opening for alternative formats built around user interaction rather than pure consumption.