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.
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 in total across 4 funding rounds.
Sleeper's investors include Abstract Ventures, Alt Capital, Andreessen Horowitz, Angel investor, Jana Messerschmidt, Animo Ventures, Avalanche VC, Banana Capital, Bettor Capital, BoxGroup, Craft Ventures, Credo Ventures.
Sleeper has raised $67.0M across 4 funding rounds. Most recently, it raised $40.0M Series C in September 2021.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Sep 1, 2021 | $40.0M Series C | Abstract Ventures, Alt Capital, Andreessen Horowitz, Angel investor, Jana Messerschmidt, Animo Ventures, Avalanche VC, Banana Capital, Bettor Capital, BoxGroup, Craft Ventures, Credo Ventures, Curious Capital, Jenny Fielding, Scott Hartley, First Round Capital, FTX Ventures, General Catalyst, Heavybit, Insight Partners, Inspired Capital, KRM Interests LLC, Lightspeed Venture Partners, March Capital, Matrix, Moving Capital, Next47, Nonlinear, Shailendra Singh, Pioneer Fund, Piton Capital, Play Ventures, Polychain Capital, QueensBridge Venture Partners, Republic Records, Rethink Impact, RTP Global, Sound Ventures, Thirty Five Ventures, Thrive Capital, Y Combinator, YLEM, Aaron Harris, Demetrios Christofidis Jr, Eden Chen, Eileen Murray, Erin Shipley, Jason Robins, Josh Mohrer, Kristian Segerstrale, Kyle Vogt, Michael Stoppelman, Nick Jonas, Pau Gasol, Paul George, Rashaun Williams, Sahin Boydas, Sam Altman, Scott Belsky, Steve Aoki, Steve Chen | |
| May 1, 2020 | $20.0M Series B | Abstract Ventures, Alt Capital, Andreessen Horowitz, Angel investor, Jana Messerschmidt, Animo Ventures, Avalanche VC, Banana Capital, BoxGroup, Craft Ventures, Credo Ventures, Jenny Fielding, Scott Hartley, First Round Capital, Foundation Capital, General Catalyst, Gradient Ventures, Inspired Capital, KRM Interests LLC, March Capital, Moving Capital, Nonlinear, Pioneer Fund, Piton Capital, Polychain Capital, QueensBridge Venture Partners, Rainfall Ventures, Republic Records, Rethink Impact, Thrive Capital, YLEM, Aaron Harris, Demetrios Christofidis Jr, Eden Chen, Erin Shipley, Josh Mohrer, Kristian Segerstrale, Kyle Vogt, Michael Stoppelman, Nick Jonas, Rashaun Williams, Sam Altman, Steve Aoki, Steve Chen | |
| Sep 1, 2018 | $5.0M Series A | Animo Ventures, Avalanche VC, Bettor Capital, CapitalG, Curious Capital, Jenny Fielding, Scott Hartley, Expa, General Catalyst, Greylock, KRM Interests LLC, Lightspeed Venture Partners, March Capital, NEO, Next Play Ventures, Nonlinear, Piton Capital, Rethink Impact, Sound Ventures, Thirty Five Ventures, Thrive Capital, Y Combinator, Adrian Aoun, Charlie Songhurst, Drew Houston, Eden Chen, Erin Shipley, Farzad Nazem, Gabriel Naouri, Hadi Partovi, Henry Kravis, Jeff Bezos, Jeffrey Wilke, Marc Benioff, Michael Stoppelman, Nicolas Berggruen, Noosheen Hashemi, Paul George, Scott Belsky, Shane Neman, Tom Chapman | |
| Aug 1, 2017 | $2.0M Seed | CapitalG, Expa, Greylock, NEO, Next Play Ventures, Y Combinator, Adrian Aoun, Charlie Songhurst, Drew Houston, Farzad Nazem, Gabriel Naouri, Hadi Partovi, Henry Kravis, Jeff Bezos, Jeffrey Wilke, Marc Benioff, Nicolas Berggruen, Noosheen Hashemi, Shane Neman, Tom Chapman |
