Prosperity7 joins Arcee AI round valuing it above $1 billion

Arcee AI has closed a Series B funding round that values the company at more than $1 billion, with Prosperity7 Ventures, the investment arm of Aramco Ventures, among the participants. The U.S. startup builds open-weight AI models, meaning businesses can take the underlying trained model, adapt it for their own needs and run it in environments they control rather than rely entirely on a vendor’s closed online service. That can appeal to companies seeking more control over sensitive data, customization and long-term technology choices. Arcee says the funding will support further model development and enterprise products. The valuation signals investor confidence that there is room for commercially viable alternatives to the largest closed AI platforms.