R-Squared Ventures is a founder-led angel fund investing in enterprise and SMB SaaS, AI, vertical software, fintech and e-commerce enablement, backed by 80+ founders, executives and VCs. It was started in 2021 by Magento co-founder Roy Rubin and Roy Erez, co-founder of Loop Commerce, and has backed TaxJar (acquired by Stripe), Tipalti and Darrow.