Level39, a tech incubator in London's Canary Wharf district, has implemented a contactless visitor check-in system to manage the flow of over 1,500 people daily. The system uses Twilio's Voice, SMS, and SendGrid APIs to integrate with the building's visitor management system and Level39's systems, enabling guests to enter a unique one-time code at the door, which notifies their host via SMS, phone, and email. This process has been crucial in allowing Level39 to remain open 24/7 throughout the COVID-19 crisis, serving essential employees and their visitors. Qaunain Meghjee, head of technology at Level39, built this system to scale processes for his members while also improving the overall experience. He has also modernized other systems, such as billing and onboarding, using Twilio APIs and has plans to integrate with Zoom Rooms for seamless video demos.