Who owns Duolingo? Ownership structure explained (2026)

Duolingo is the most widely used language-learning app in the world, and it reached that position from an unlikely base: Pittsburgh, Pennsylvania, rather than Silicon Valley. The company turned a free product and a cartoon owl mascot into a business that booked more than $1 billion in revenue in 2025 and counts tens of millions of daily active users.

On paper, ownership of a public company like Duolingo looks simple. Anyone can buy shares. In practice, control of Duolingo is concentrated in the hands of its two founders through a dual-class share structure that gives their stock 20 votes per share. That arrangement lets Luis von Ahn and Severin Hacker steer the company even though they own a minority of its economic value.

Understanding who owns Duolingo matters because the company operates in education, handles data on tens of millions of learners, and is making an aggressive bet on artificial intelligence to build and deliver its lessons. Ownership determines who decides how far that bet goes.

Duolingo, Inc. was founded in 2011 by Luis von Ahn and Severin Hacker. The two met at Carnegie Mellon University, where von Ahn was a computer science professor and Hacker was a PhD student. Von Ahn had already sold two companies to Google, including reCAPTCHA, the system that turns human verification into digitized text, and he wanted his next project to widen access to education. The pair launched Duolingo as a free language-learning platform.

The company is headquartered in Pittsburgh, Pennsylvania, and remains one of the few large consumer technology companies built outside the traditional coastal hubs. Its core product is a mobile and web app that teaches languages through short, game-like lessons, monetized through a freemium model: most users learn for free with ads, while paying subscribers buy the ad-free Super Duolingo and Duolingo Max tiers. The company has since expanded into math, music, and English proficiency testing through the Duolingo English Test.

Duolingo reported full-year 2025 revenue of roughly $1.04 billion, up about 39% from 2024. In the second quarter of 2026, revenue reached $298.5 million, up 18% year over year, with 58.7 million daily active users and 12.7 million paid subscribers. Its market capitalization stood near $6 billion in August 2026, a figure a discounted cash flow model would tie to its future subscriber cash flows.

Duolingo is a public company. Its Class A shares trade on the Nasdaq Global Select Market under the ticker DUOL, following an initial public offering on July 28, 2021. There is no parent company and no single majority economic owner. Ownership is split among founders, institutional investors, company insiders, and public shareholders. Because Duolingo is public, its ownership and governance are disclosed in filings with the US Securities and Exchange Commission, unlike private companies that can keep their cap tables hidden.

Duolingo uses a dual-class share structure. Class A shares, the ones the public buys, carry one vote each. Class B shares, held by the founders and a small group of pre-IPO insiders, carry 20 votes each. This is the mechanism that keeps control with von Ahn and Hacker even as their economic ownership has been diluted by years of fundraising and public trading.

According to Duolingo's 2026 proxy statement, Luis von Ahn controls roughly 40% of total voting power and Severin Hacker roughly 36%. Combined, the two founders command about 75.8% of the vote, a clear majority. All executive officers and directors as a group hold about 76% of voting power. Their economic stakes are far smaller than their voting stakes: von Ahn's beneficial ownership of Class A stock is in the mid-single digits as a percentage of that class. The gap between economic ownership and voting control is the defining feature of Duolingo's ownership.

Before it went public, Duolingo raised a series of venture rounds from prominent technology investors, following the classic venture path that most venture-backed startups never complete. Total pre-IPO funding was more than $180 million.

Note: Round sizes and valuations are drawn from disclosed reporting and vary slightly across sources. Individual angel investors, including actors Ashton Kutcher and author Tim Ferriss, also participated in earlier rounds.

BlackRock is Duolingo's largest institutional shareholder, holding a stake reported in the high-single-digit percentage range across its funds. As the world's biggest asset manager, BlackRock holds Duolingo primarily through index and exchange-traded funds rather than as an active bet on the company.

The Vanguard Group is the other major institutional holder, disclosing a stake of about 5% of Duolingo's Class A stock in a 2026 filing. Like BlackRock, Vanguard's position reflects passive index ownership tied to Duolingo's inclusion in broad market benchmarks.

Several of Duolingo's pre-IPO venture backers, including Union Square Ventures, New Enterprise Associates (NEA), Kleiner Perkins, and CapitalG, held sizable stakes at the time of the offering. CapitalG is the independent growth fund of Alphabet, the parent of Google, giving Google-affiliated capital an early and repeated presence on Duolingo's cap table. Venture investors typically sell down their holdings over the years following an IPO, so their current positions are smaller than at listing.

Because Duolingo is public, its float, the Class A shares available to trade, is owned by a mix of institutions and retail investors. A large share of the register is held by individual investors, which is unusual for a company of its size and reflects Duolingo's strong consumer brand, built on viral, Gen Z-focused marketing. The dual-class structure means that no matter how those public shares change hands, voting control stays with the founders until their Class B shares convert to Class A, which happens on transfer or after a sunset period defined in the company's charter.

Luis von Ahn is Duolingo's chief executive officer, chairman of the board, and its largest individual voting shareholder. He set the company's mission of making education free and accessible, and he remains the public face of the brand. His control of roughly 40% of the vote, combined with the board seat he chairs, gives him decisive influence over strategy, capital allocation, and Duolingo's push into AI-generated content. Before Duolingo, von Ahn founded reCAPTCHA and ESP Game, both acquired by Google.

Severin Hacker is co-founder and chief technology officer. He oversees Duolingo's engineering and product technology, including the AI systems that now generate and personalize lessons. Hacker controls about 36% of the vote, second only to von Ahn, making the two founders a controlling bloc when they vote together.

Duolingo's board is chaired by von Ahn and includes Hacker alongside a slate of independent directors. Reported directors include Amy Bohutinsky, Sara Clemens, Bing Gordon, John Lilly, Gillian Munson, Bonnie Ross, Mario Schlosser, and Jim Shelton. Several bring consumer-technology and venture backgrounds: Gordon is a longtime Kleiner Perkins partner, and Lilly is a former Mozilla CEO and venture investor. Because the founders hold voting control, board elections and shareholder proposals reflect their preferences.

Duolingo's dual-class structure concentrates voting power with its founders and limits the influence of outside shareholders. Public investors who buy Class A stock get one vote per share while the founders' Class B stock gets 20. Governance advocates argue this arrangement weakens accountability, because ordinary shareholders cannot force changes to the board or strategy over the founders' objection. The setup echoes the founder-control model at other technology companies, such as the one that keeps Mark Zuckerberg in command of Meta. Duolingo discloses this as a risk factor, and index providers have at times restricted the weighting of dual-class companies.

In 2025, Duolingo drew public criticism after von Ahn described the company as "AI-first" and signaled that it would reduce reliance on contractors for work that AI could handle. The messaging prompted a backlash on social media from users and observers who read it as prioritizing automation over people. The episode is relevant to ownership because the founders' voting control means the AI-first direction rests largely on their judgment rather than on a vote that outside shareholders could swing.

Duolingo collects data on tens of millions of learners, including younger users through its school-focused products. That exposes the company to data-protection regimes such as the EU's GDPR and US children's privacy rules. Any material enforcement action would fall on the public company and its shareholders, and the founders' control shapes how aggressively Duolingo pursues data-driven personalization.

Duolingo's ownership structure concentrates strategic control in two people while spreading economic risk across public shareholders. That split has clear consequences.

For the company, founder control has allowed von Ahn to make long-horizon bets, including years of free product growth before monetization and a heavy investment in AI-generated lessons, without needing to satisfy activist investors each quarter. Supporters of dual-class structures argue this is exactly what lets mission-driven founders resist short-term pressure. Duolingo's rise from a free app to a billion-dollar revenue base is the case in favor.

For investors, the same structure limits their leverage. When Duolingo's stock fell sharply in 2026 on a softer growth outlook, public shareholders bore the loss but had little ability to demand changes, because the founders control the vote. Institutions like BlackRock and Vanguard hold large economic stakes yet cannot outvote von Ahn and Hacker. Buying DUOL is a bet on the founders as much as on the business.

For users, ownership matters because the founders' control shapes product decisions that affect how people learn. The push toward AI-generated content, the balance between free and paid tiers, and the handling of learner data all flow from a leadership team that answers primarily to itself. That can protect the free-education mission, or it can prioritize monetization, depending on how the founders choose to use their control.

The structure also affects Duolingo's independence. A company where founders hold 76% of the vote is effectively takeover-proof. No acquirer can buy Duolingo without von Ahn's and Hacker's consent, which insulates the company from consolidation in the education and consumer-app markets but also removes a potential source of shareholder value if the stock stays depressed.

Luis von Ahn is the chief executive officer and chairman of Duolingo. He co-founded the company in 2011 with Severin Hacker and controls roughly 40% of its voting power through Class B shares. Before Duolingo, he created reCAPTCHA and ESP Game, both of which were acquired by Google.

Yes. Duolingo trades on the Nasdaq under the ticker DUOL after going public on July 28, 2021 at $102 per share. Its market capitalization was near $6 billion in August 2026. It has no parent company.

Duolingo was co-founded in 2011 by Luis von Ahn and Severin Hacker at Carnegie Mellon University. Von Ahn serves as CEO and chairman, and Hacker serves as chief technology officer. Together they hold a controlling share of the company's voting power.

By voting power, the biggest shareholders are the two founders, Luis von Ahn and Severin Hacker, who together control about 76% of the vote through dual-class Class B shares. By economic stake, the largest institutional holders are BlackRock and The Vanguard Group, each with a mid-to-high-single-digit percentage of the shares outstanding, held mostly through index funds.

Duolingo raised more than $180 million in venture funding before going public, across rounds led by Union Square Ventures, New Enterprise Associates, Kleiner Perkins, CapitalG (Alphabet's growth fund), Drive Capital, and others. Its 2021 IPO raised roughly $521 million more at a valuation of about $6.5 billion.

Duolingo was valued near $470 million in 2015, reached $1.5 billion in 2019, hit $2.4 billion in a 2020 private round, and listed at about $6.5 billion in 2021. Its market capitalization has since fluctuated widely, standing near $6 billion in August 2026 after a roughly 60% decline over the prior year, even as annual revenue passed $1 billion.