Redfast is an active user personalization system for subscription and engagement businesses. Redfast is based on the principle that usage is the single best predictor of a user's intent to continue or cancel their membership. By automating the continuous evaluation of 30+ usage indicators in real-time, Redfast produces an always-on awareness about each user's propensity to remain a customer when they are on your site/app. Usage information is further augmented with that user's LTV, NPS, CAC, and the monthly user acquisition/retention budget to produce and present the user with a highly relevant feature, content, or offer promotions that can be configured to appear anywhere on your site, even inside the main content area. Redfast can also go beyond promotions to enable advanced uses like extending trials automatically for subscribers that have not had a chance to try the service or automatically extend membership at no cost for users that have not used the service. Under the hood, Redfast is an innovative cloud routing and streaming data platform similar to the technology platform used at Uber for surge pricing. Redfast’s innovative platform can make your backend business systems and server-side code, as well as the app frontend, have continuous awareness and targetability of user characteristics beyond just the basics like time of day, IP address, and user agent. It enables your app to be richer, self-sufficient, and more personalized. Machine learning (beta) further expands on the targeting capabilities within the platform by creating a Churn Score and Fraud Score for each user. Redfast is optimized for the needs of subscription businesses in video, music, games, health, and e-commerce. Redfast ([https://www.redfast.com](https://www.redfast.com/)) is based in Cupertino, CA and led by serial entrepreneurs with deep expertise in cloud, devices, subscriptions and funded by Menlo Ventures.