speedrun

Welcome to Sansome

Sign in to book and manage visits to the a16z Sansome office — for guests, staff, and Alpha founders. speedrun founders book office days from their founder hub.

We'll email a one-time code and a sign-in link — no password needed.

How It Works

Verify Your Email

Sign in with a one-time code or link. Founders on the current speedrun roster are recognized automatically.

Register Your Visit

Pick a date and arrival time — for yourself, or bring a guest. Your status shows as Registered, Pending, or Declined.

Check In and Work

A QR code arrives by email from Envoy for front-desk check-in. Desks are first-come, first-served — no reservations needed.

Be mindful of the space — if you can't make it, cancel or update your registration in advance.