Fundraising FoxSleeper
Founded 2015 · 16 known investors
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Sleeper operates a mobile app and website offering free-to-play games, paid contests of skill, and fantasy sports products for sports fans to engage together socially. The platform enables users to create bonds with friends while participating in fantasy sports competition.
Also known as Sleeper · sleeper.app
Founders & leadership
Sleeper was founded in 2015 by Henry Leung.
Investors · 16
How we know: a16z's portfolio · funding news · sleeper.com · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
How we know: Birchmere Ventures's portfolio page · Not right? Tell us
How we know: techstartups.com · the VCSheet dataset · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
How we know: Nimble Partners's portfolio page · Not right? Tell us
How we know: Rainfall Ventures's portfolio page · the VCSheet dataset · Not right? Tell us
How we know: Smash Capital's portfolio page · Not right? Tell us
How we know: Titanium Ventures's portfolio page · the VCSheet dataset · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
How we know: a partner's Signal profile · Not right? Tell us
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Also in the syndicate · 1
Funding
SEC filings, press & company announcements$40M disclosed across 1 of 3 rounds · 2019–2021
- $40MSeries CSep 2021 · 3 sources
Andreessen Horowitz (lead)
Source ↗ - Undisclosed amountSeries AAug 2019
Birchmore Ventures (lead), General Catalyst (lead), Expa
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Company profile
researched Aug 2026Sleeper operates a sports platform, accessible via sleeper.app, that combines fantasy sports products with live score tracking and social engagement features for fans. The public site presents a scoreboard experience organized by league, with tabs for the NFL, MLB and WNBA, showing completed games with final scores, in-progress and upcoming matchups with start times and broadcast networks, and team records.
Alongside scores, game listings surface player-level detail such as winning pitchers with innings pitched, earned runs, strikeouts and walks in baseball, and leading scorers with points, rebounds and assists in basketball. The site gates deeper functionality behind account creation, offering log-in and sign-up entry points for registered users.
▸Full profile — go-to-market
Go-to-market
Sports fans following professional leagues such as the NFL, MLB and WNBA.
Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.
Founder mafia
2 people who came through Sleeper went on to found or lead other companies.
Related companies · 5
Companies working in the same space as Sleeper.
In the news
▸Research sources · 1
primary sources listed
- Sleepersleeper.app · web
1 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Sleeper do?
- Sleeper is a sports app offering fantasy sports, live scores and social features across leagues including the NFL, MLB and WNBA.
- Who founded Sleeper?
- Sleeper was founded by Henry Leung in 2015.
- Who are Sleeper's investors?
- Sleeper's investors include Alumni Ventures, Andreessen Horowitz, Basecamp Fund, Birchmere Ventures, Expa, Leonis Capital, Nimble Partners, Rainfall Ventures and 7 more.
- How much funding has Sleeper raised?
- Sleeper has disclosed $40M raised across 1 of its 3 known rounds.