Shift + Alt Events

Shift + Alt Events is a San Francisco-based event planning and production agency serving corporate clients, private individuals, and nonprofit organizations across weddings and a wide range of event types. The agency handles end-to-end event production from concept through execution, covering venue hunts, event design, branding, day-of coordination, and strategic consultancy, with budgets ranging from $10,000 to $10,000,000 and guest counts from 15 to 23,000. Founded by Vivienne Errington-Barnes, whose background includes project and programme management for investment banks in London and C-level roles at San Francisco tech companies including Chief of Staff at Calm; the agency now produces around 500 events per year worldwide. Headquartered in San Francisco with offices also in London and Lisbon, the team produces events anywhere in the world, from NYC to Costa Rica. Reviewers consistently highlight clear communication, attention to detail, and smooth execution, with several noting the team's ability to translate a client's overall vision across all vendors and deliver high-impact events.