Rezhound is a service that allows users to snag last-minute restaurant reservations via SMS using Twilio technology. The platform was founded by Reed Kavner, who wanted to help people get into their favorite restaurants without making extensive reservations in advance. By searching for a restaurant and selecting available time slots, users can receive alerts via SMS when a table becomes available. This service aims to reduce the stress of last-minute dining experiences, making it easier for people to enjoy their favorite restaurants on short notice.