Loading organizations...
§ Private Profile · San Mateo, CA, USA
Sleeper is a technology company.
Sleeper has raised $67.0M across 4 funding rounds.
Key people at Sleeper.
Sleeper has raised $67.0M in total across 4 funding rounds.
Sleeper develops and operates a mobile-first fantasy sports platform, offering engaging leagues for various sports including football, basketball, and esports. The core product provides an interactive environment for participants to manage teams, track performance, and communicate. Its platform emphasizes integrated in-app chat functionalities, designed to facilitate social interaction and foster community among users across Android and iOS devices.
The company was founded in 2015 by Nan Wang, Weixi Yen, and Ken Wang. Their initial insight was to create a more dynamic and community-driven fantasy sports experience compared to existing options. They aimed to build a platform that prioritizes user connection and an intuitive interface for managing fantasy leagues, focusing on the social aspects of competitive gameplay.
Sleeper primarily serves individuals who seek to participate in fantasy sports with friends, family, and colleagues, thereby fostering a social layer within the competitive gaming experience. The company envisions itself as the central hub for sports fandom and connection, continuously enhancing the interactive elements of fantasy gameplay to bring people closer through their shared passion.
Key people at Sleeper.
# Sleeper: High-Level Overview
Sleeper is a social-first fantasy sports platform that enables users to create and participate in fantasy leagues across football, basketball, esports, and daily fantasy sports.[1][2] Founded in 2015 and based in San Francisco, the company has positioned itself as a modern alternative to legacy platforms like ESPN and Yahoo by prioritizing user experience, social connectivity, and mobile-first design.[1][3]
The platform solves a fundamental problem in fantasy sports: the fragmentation of the social experience. While traditional fantasy platforms focus on roster management and scoring, Sleeper integrates real-time chat, customizable notifications, integrated messaging, and community features directly into the app, allowing friends to strengthen bonds through shared sports experiences.[3][4] The company has achieved remarkable organic growth, becoming "the fastest organically growing fantasy platform in the world" with fantasy leagues growing 700 percent year-over-year and earning some of the highest engagement-per-user metrics in the industry.[2][3]
Sleeper operates on a free-to-play model with paid contests of skill, generating revenue through a "Wallet" feature that takes a cut of prize league revenue.[5] The company has raised $67.3 million across four funding rounds, with its most recent Series C round raising $40 million, backed by prominent investors including Andreessen Horowitz, General Catalyst, and others.[1][2]
Sleeper was founded in 2015 by Nan Wang (CEO) and Weixi Yen (CTO), childhood friends who embodied the convergence of technology, social networks, and sports.[3] After college, Wang and Yen moved to different coasts and countries, each developing expertise in mobile games, finance, and startups. Despite the distance, they maintained their friendship through a nearly 20-year fantasy football league and by playing League of Legends together—experiences that directly inspired Sleeper's founding vision.[3]
The founding team expanded to include Ken Wang and Henry Leung, creating a four-person unit that recognized an emerging consumer behavior shift: phones were becoming constant companions, and users were simultaneously texting, watching games, sharing video clips, and teasing friends in real time.[3] Originally launched as Sleeperbot (2015-2016) with a focus on drafting, the platform was rebranded to Sleeper in 2017 with the launch of Sleeper 2.0, which introduced the full fantasy league experience.[5] The company expanded into basketball in 2020 and subsequently into esports, particularly League of Legends fantasy competitions.[3][5]
Sleeper exemplifies a broader shift in consumer software: the social-first redesign of legacy categories. Just as Figma disrupted design tools and Slack reimagined workplace communication, Sleeper is applying modern mobile and social design principles to fantasy sports—a category dominated by incumbents for decades.[3]
The timing is critical. Fantasy sports participation has grown substantially, and younger demographics increasingly expect seamless social integration in entertainment products.[2][3] Sleeper's organic growth (700% year-over-year) suggests the market is receptive to a modern alternative that prioritizes friendship and engagement over pure competitive mechanics.[3]
The company also bridges traditional sports and esports, recognizing that the crossover audience is expanding.[3] By offering League of Legends fantasy competitions alongside NFL and NBA leagues, Sleeper positions itself at the intersection of two massive entertainment verticals, capturing users who might otherwise fragment across separate platforms.
Sleeper has successfully challenged the assumption that fantasy sports platforms must be complex, ad-laden, or desktop-centric. Its $67.3 million in funding and 700% year-over-year growth suggest the market validates its thesis: people want to enjoy sports with friends, not just compete against strangers.
The company's next frontier likely involves monetization maturation—converting its massive, highly engaged user base into sustainable revenue without compromising the free experience that drives adoption.[5] Expansion into additional sports (college football, soccer) and deeper esports integration could further diversify the platform. As traditional sports media faces cord-cutting pressures and younger audiences seek peer-driven entertainment, Sleeper's social-first model positions it to capture a generation that views fantasy sports as a vehicle for friendship rather than pure competition.
The broader implication: legacy platforms in entertainment and gaming should expect continued disruption from companies that prioritize modern design, social integration, and mobile-first experiences over feature parity with incumbents.
Sleeper has raised $67.0M across 4 funding rounds. Most recently, it raised $40.0M Series C in September 2021.
Sleeper has raised $67.0M in total across 4 funding rounds.
Sleeper's investors include David George, Abstract Ventures, Alt Capital, Andreessen Horowitz, Angel investor, Jana Messerschmidt, Animo Ventures, Avalanche VC, Banana Capital, Bettor Capital, BoxGroup, Craft Ventures.
