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Millie

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South Korea's leading e-book subscription platform

Seoul, South KoreaFounded 2016Consumer Services
Valuation $100–250M Last recorded · 2023
Revenue $50–100M Latest reported FY
Headcount 100–500 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Millie and the history behind them.

About Millie

Millie's Library (밀리의 서재), established in July 2016 and officially launched in October 2017, is a South Korean company that pioneered the subscription-based e-book service in the country. The platform provides subscribers with unlimited access to a vast collection of digital content. The company was founded by Seo Young-taek, who serves as the CEO.

The business operates on a subscription model, offering monthly plans for access to its extensive library. This includes not only e-books but also various other forms of content designed to cater to modern consumers. The service provides over 160,000 e-books and audiobooks from more than 1,400 publishers. To enhance the user experience, Millie's Library has developed innovative features like "chat books" (books formatted as chat conversations), AI Reading Farming for interactive discussions with an AI, and "Millie Pairing," which synchronizes e-books with audiobooks or AI-powered text-to-speech. The platform also produces original content to attract and retain subscribers.

In September 2021, Genie Music, a subsidiary of telecommunications giant KT Corporation, acquired a 38.6% stake in Millie's Library for 46.4 billion won, becoming its largest shareholder. This strategic acquisition was aimed at creating synergies between the two platforms, such as offering bundled subscription plans and adapting Millie's intellectual property into other media formats like audio dramas or video content. Following the acquisition, Millie's Library pursued an initial public offering (IPO) and was listed on the KOSDAQ market. By 2022, the company reported sales of 45.8 billion won and achieved profitability.

Source: Dealroom company data

At a glance

Status
Acquired
Founded
2016
Headquarters
Seoul, South Korea
Employees
118
Open positions
None listed
Dealroom signal
49.7/100
Industry
Music
Sector
Consumer Services

Funding history

5 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
IPO✓Exit Sep 2023 $201M $201M Undisclosed —
ACQUISITION✓Exit Sep 2021 $0 — Genie Music ↗
Showing the latest 2 of 5 recorded eventsBook a demo for the full funding history →

Financials

Revenue over time

Revenue, earnings and other financial measures where available. Years marked “E” are estimates.

YearRevenueGrowth
2026
2025
2024
2023
2022
2021 —
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Growth signals

Millie website traffic

Latest recorded traffic for Millie is 1.7M monthly website visits, up 13.3% over the last three months. Millie's team grew 168.2% over the past year.

Latest monthly visits1.7M 3-month web change+13.3% 1-year team growth+168.2%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

7 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A4 investors entered at this stage

  • Kolon Investment
  • KB Investment
  • HB Investment
  • L&S Venture Capital

Series B and later2 investors entered at this stage

  • STIC Ventures
  • Korea Investment Partners

Other known investors1 additional known investor

  • Genie Music
Team profiled 1 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 1 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
1 countries with
team presence
🇰🇷 South Korea100%
1 country shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Millie on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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