Oxx is a London- and Stockholm-based venture fund that focuses specifically on European B2B SaaS companies moving from product-market fit to go-to-market fit, a stage after Series A that it believes is often overlooked, and it supports this focus with a dedicated go-to-market toolkit and a small, highly selective portfolio rather than a broad one. The firm is led by former operators and finance professionals rather than career investors, tends to favor founders who have already been through a scaling journey, and also publishes an annual study on open-source startups.