OneStack is a B2B fintech firm focused on empowering cooperative banks, credit societies, and other traditional financial institutions through technology. Their core offering is a "super app" platform that allows these institutions to quickly launch a comprehensive suite of digital banking services under their own brand. This platform consolidates various financial products, including payments (UPI, BBPS), investments (mutual funds, digital gold), insurance, and loans, into a single mobile application for the end-user. The company's mission is to bridge the technology gap for smaller banks, enabling them to compete with larger digital-first players and enhance customer engagement.