O'Reilly AlphaTech Ventures is a San Francisco-based venture capital firm associated with O'Reilly Media that backs U.S. technology startups. The firm invests at seed and early-stage rounds, with some later-stage participation, and is relevant for founders building information technology, internet, developer tools, data, AI, cloud, cybersecurity, enterprise software, SaaS, education, design, e-commerce and marketplace companies.