A social media app that feels like the old Instagram days raised $21 million

Retro is a social media app for sharing content with friends and family. Screenshot/Retro/BI Retro, designed by ex-Instagram employees, is a social app for sharing content with close friends. The startup behind it has raised $21 million, recent financial filings reveal. It's one of many new social media apps taking on Big Tech platforms. There's a social media app I like using more than Instagram or TikTok — and it's attracted serious investor interest. The app, called Retro, is an Instagra...