Data-Provenance Startup SignSplit Launches With $400M From W Group at $1B Valuation

SignSplit launched out of stealth with $400M from W Group at a $1B valuation, offering infrastructure for people to digitally sign datasets, likenesses and creative works and receive payment when AI firms use them. Founded in 2024 and led by CEO Alessandro Monterosso, the platform covers data provenance, consent terms, aggregated 'data pools' and verification layers aimed at researchers and businesses training models.