Upflow, a French startup, is shifting its focus from invoice management to becoming a comprehensive B2B payment platform, introducing its own payment gateway. The company aims to modernize outdated B2B payment methods, which still largely rely on paper checks. Upflow will assist CFOs in transitioning a portion of their clients to online payment methods, promoting financial efficiency. The startup is adopting a hybrid revenue model, integrating SaaS with payment processing revenue using a partnership with Stripe. Future plans include offering financing options and embedded finance solutions for businesses.