Walden Catalyst is a venture capital fund investing in AI and developer tools, focusing on Series B funding with checks ranging from $500k to $10M. Operating in the U.S., Europe, and Israel, they help early-stage companies grow in deep tech. Led by industry experts Young Sohn and Lip-Bu Tan, Walden Catalyst has supported over 560 startups, with 115 going public. With $550 million under management, they offer startups expert advice, global connections, and robust industry networks. Notable investments include AI21 Labs.