A report based on leaked information from a hacking incident says Suno’s AI music generator was trained by scraping large volumes of music and lyrics from multiple online sources. Several outlets cite findings from 404 Media indicating that Suno’s training data acquisition involved pulling content from platforms including YouTube Music, Deezer and Genius, along with additional sites mentioned in the leak such as Pond5, Jamendo and Freesound, and podcast RSS feeds. The material reportedly includes source code with scraping instructions and dataset details, such as counts of ingested music clips and hours associated with different sources. Some leaked code also describes steps aimed at filtering content and searching for acapella or vocal-related material.

The incident is also described as exposing customer data risk. Accounts in the coverage say the hacker accessed a customer list that could include emails or phone numbers and payment-related details through Stripe credentials, depending on login method, though the exact extent of data exposure is described through reporting rather than verified by Suno in the articles. Suno continues to characterize its training approach as using publicly available music files and metadata under fair use, while critics and prior legal claims have argued the training involved copyrighted works without permission. Sources agree the datasets were not previously disclosed in detail by Suno.