Suno hits 55M users with watermarking tools as copyright lawsuits mount

Suno is finally putting up guardrails. The AI music startup, which lets anyone generate a song from a text prompt, announced a suite of new protections on Thursday: audio watermarking, download limits, and stricter community rules. The timing is no coincidence. The company is currently trading legal blows with Universal Music Group, Sony Music Group, and German licensing agency GEMA, all while digesting a class-action lawsuit over a data breach that exposed 55 million users.

The most concrete change involves embedding watermarks and fingerprints into every track created on the platform. Suno says the markers are tamper-resistant and won’t degrade audio quality. The goal is straightforward: stop users from uploading AI-generated tracks to Spotify or Apple Music and gaming the royalty system. The company also signed a deal with Musixmatch to use its Sentinel system for copyright detection, adding a layer of scanning for lyrics that might infringe on existing works. “Our role is to build tools that give them transparency options and make it easier to collaborate across the industry,” co-founder and CEO Mikey Shulman wrote in a blog post.

What Suno didn’t say is just as telling. The company declined to specify which watermarking technology it’s using — Google’s SynthID is the obvious candidate, but Suno stayed silent when TechCrunch asked directly. Details on the new download policy designed to prevent mass distribution to streaming platforms were also kept vague. This pattern of announcing principles without operational specifics has been Suno’s playbook since the lawsuits started piling up.

Here’s the uncomfortable reality the blog post sidesteps entirely: 404 Media’s reporting on Suno’s November 2025 data breach revealed the company scraped YouTube, Deezer, and Genius to train its models. That disclosure fundamentally changes how these new protections read. Suno frames watermarking as an artist-friendly transparency measure, but it looks more like a shield against discovery in ongoing litigation. The company raised $400 million in June at a valuation that assumed it could outrun the copyright questions. The bill for that assumption is now coming due in courtrooms across two continents.