Two San Francisco robot fighting leagues backed by VC and AI sponsors are staging events, but a major announced competition at Kezar Pavilion lacks public permit records, raising questions about regulatory approval.

San Francisco's newest tech-infused spectacle—humanoid robot combat leagues backed by venture capital and AI infrastructure firms—is moving faster than city permits can keep up. At least two competing leagues, REK and Ultimate Bots, are staging events across the city, but one major announced competition at a public venue lacks the paperwork to prove it's actually approved.

Robot Entertainment Kombat (REK), led by founder Cix Liv, is promoting "REK1: World's Biggest Robot Fight" for February 7, 2026, at Kezar Pavilion. But as of July 2, the event doesn't appear on the San Francisco Recreation & Parks Department's master list of approved special events for that venue. The San Francisco Fire Department requires operational permits for assembly events before they can proceed, but no public record confirms REK has secured those permits for the Kezar show.

REK plans to open a permanent 6,000-square-foot "pit shop" at 1415 Van Ness Avenue in July 2026 for robot sales, rentals, and training. The company primarily uses Unitree H1 humanoid robots from Chinese manufacturer Unitree, controlled by human pilots via VR headsets during bouts.

Meanwhile, Ultimate Bots (formerly Ultimate Fighting Bots), co-founded by Vitaly and Xenia Bulatov, has already executed events. Their "Fight x Dance" at Temple nightclub on May 14, 2026, drew over 100 attendees paying $50-$80 per ticket. Ultimate Bots carries sponsorship from Nebius, an AI infrastructure platform backed by Nvidia, which brands itself as the "Ultimate Physical AI Cloud" for the competitions. Venture capital firm General Catalyst is also reported to support a San Francisco-based robot fight startup, though specific investment amounts haven't been disclosed.

The leagues position themselves as a new form of entertainment, blending anime-inspired aesthetics with UFC-style combat staging. Unlike the now-defunct RoboGames, these 2026 events integrate VR piloting and aim for permanent venues and sustainable commercial models.

But the gap between promotional claims and municipal approval remains unresolved. Neither league has publicly confirmed securing the necessary permits for larger events, and no community opposition or official political statements from city leaders have emerged. The funding behind the spectacles—particularly the undisclosed amounts from sponsors like Nebius and General Catalyst—remains opaque in public filings.

What's clear is that money and hardware are moving into San Francisco's robot fighting scene. What's unconfirmed is whether the city's regulatory framework is ready for humanoid combat robots in public venues.