Speak
AI app for practicing spoken English, dominant in Korea, expanding into US and enterprise.
On the record
Checkpoint: Duolingo's next quarterly earnings report showing AI feature engagement and ARPU
The call
Speak has real scale and a strong home base in Korea, but its main conversational feature runs on the same AI everyone else can rent, and Duolingo already ships a similar tool.
Speak teaches languages through AI conversation practice and has real traction in South Korea, where it is the top education app. But it faces two serious threats: Duolingo, which is seven times larger and already adding AI conversation features to its app, and free tools like ChatGPT Voice that let anyone practice conversation without paying. Speak's brand strength in Korea and its curriculum are real advantages, but neither is hard to copy, and if Duolingo accelerates its AI features or if free AI conversation tools get better, Speak's reason to exist shrinks fast.
Why
01
AI pressure: ChatGPT Voice and Gemini Live. Free voice AI from ChatGPT and Gemini Live can hold a spoken English conversation too, built on the same OpenAI tech Speak rents. Could AI do the core job? Only partly.
02
Bigger players: Duolingo. Duolingo, seven times Speak's revenue, now ships its own AI chatbot Lily and AI video sessions that copy Speak's core feature. Could a giant copy it? Yes, easily.
03
What protects it. Deep brand dominance in Korea plus a growing base of roughly 500 enterprise customers that took real time to build.
What would change this call
Duolingo reports AI feature engagement or ARPU lift in a 2026 quarterly earnings call. Would show the larger incumbent's copied features are working, narrowing Speak's window.
Speak for Business enterprise customer count surpasses 1,000 orgs with seat expansion data. Would show enterprise lock-in strengthening beyond current ~500 orgs.
Speak announces a Series D or IPO filing within the next two quarters. Would confirm growth momentum is translating into new capital validation.
Speak for Business enterprise customer count surpasses 1,000 orgs with seat expansion data. Would show enterprise lock-in strengthening beyond current ~500 orgs.
Speak announces a Series D or IPO filing within the next two quarters. Would confirm growth momentum is translating into new capital validation.
Key numbers
- Speak crossed $100M in annualized revenue
- Valued at $1B after $78M Series C
- Speak for Business grew to about 500 organizations
Named risks
- Core conversational practice relies on rented OpenAI Realtime API, same tech free in ChatGPT Voice and Gemini Live.
- Duolingo, 7x larger by revenue and publicly traded, is actively copying AI conversation features like Lily.
- No new funding round publicly reported since December 2024 Series C despite reported $100M ARR growth.
- Growth and brand strength concentrated in South Korea, with unproven replication in second major market.
- Well funded direct peers (ELSA, Loora, Praktika) target the same AI conversational English niche.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Duolingo | losing to | Duolingo's ~$724M 2024 revenue is 7x Speak's $100M ARR (Nov 2025) and has shipped AI chatbot Lily |
| ELSA | contesting | Vietnam origin AI pronunciation coach raised funding rounds through 2023-2026, competes in same AI-speech niche |
| Praktika | contesting | AI avatar language learning startup raised $35.5M, reported November 2025 |
| OpenAI Realtime API general assistants (ChatGPT Voice, Gemini Live) | losing to | Free conversational voice AI runs on same underlying API Speak rents, commoditizing core feature |
| Loora | contesting | Tel Aviv AI conversational English tutor targeting business fluency, funded February 2024 |
Questions people ask
- Is Speak profitable in 2026?
- No profitability figures are publicly disclosed. Speak is private and reported crossing $100 million in annualized revenue by November 2025 (vendor claimed, via Forbes reporting cited by Benzinga on 2025-11-20), but no profit margin or net income data has been released.
- Who owns Speak, the language learning app?
- Speak is independent and venture backed, not owned by a parent company. Its Series C closed December 10, 2024: $78 million at a $1 billion valuation, led by Accel with OpenAI Startup Fund, Khosla Ventures, and Y Combinator participating.
- Could AI replace Speak's core product?
- Speak's conversational practice runs on OpenAI's Realtime API, the same foundation powering free ChatGPT Voice and Gemini Live, so the core feature is commoditizing. Speak's late-2024 'Live Roleplays' launch used this same rented API, per TechCrunch, December 10, 2024.
- Who is Speak's biggest competitor?
- Duolingo (NASDAQ: DUOL) is Speak's biggest threat: it reported about $724 million in 2024 revenue versus Speak's $100 million ARR (as of November 2025) and has already shipped an AI chatbot called 'Lily' that directly rivals Speak's conversation practice.
- How much funding has Speak raised total?
- Speak has raised roughly $160 to $166 million across rounds from 2017 accelerator funding through its December 2024 Series C, which alone brought in $78 million at a $1 billion valuation, backed by OpenAI Startup Fund, Accel, and Khosla Ventures.
- Does Speak mainly operate in South Korea?
- Yes. As of August 2023 reporting, Speak had helped teach English to nearly 6% of South Korea's population (about 3 million people) and was the #1 top-grossing English learning app on Korea's App Store; leadership called Korea its 'launchpad' in a July 23, 2026 Korea Times interview.
Timeline
- 2026-07-23Speak leadership says company is doubling down on Korea as launchpad, per Korea Times interview
- 2026-06-18Speak reports about 15 million cumulative app downloads
- 2026-06-11Speak adds World Cup themed soccer conversation content to Free Talk
- 2026-05Speak adds Chinese, expanding to 6 supported languages
- 2025-12-10Speak launches Speak Level fluency assessment in Korea, Japan, Taiwan
- 2025-11-20Speak reportedly crosses $100 million ARR; enterprise base grows to about 500 orgs
- 2025-06Speak pushes more aggressively into the US consumer market
- 2024-12-10Speak closes $78M Series C at $1B valuation, becomes unicorn, launches Live Roleplays
- 2024-06-18Speak closes $20M Series B-3 at $500M valuation
- 2023-08-31Speak raises $16M Series B-2 to expand into the US; ~6% of South Korea using app
Revision history
26 July 2026
First assessed. Losing its protection. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- This $1 Billion AI Startup...Just Hit $100M Revenue (2025-11-20)
- OpenAI-backed Speak raises $78M at $1B valuation (2024-12-10)
- Speak AI Labs' AI Teachers Personalize Learning by Level (2026-06-18)
- OpenAI-backed language learning app Speak raises $16M (2023-08-31)
- Enterprise Language learning
- Speak Raises $78M to Transform Language Learning with AI (2025-04-14)
- This $1 Billion AI Startup... (2025-11-20)
- Speak Announces $27M Series B Led by OpenAI Startup Fund (2022-11-18)
- Speak Hits $500M Valuation, Expands Rapidly Across Markets (2024-06-18)
- What is Speak? Profile, leadership & funding, Komo
- AI Language Learning Startup Speak Raises $78M (2024-12-10)
- Blog ENG for ES page (2026-07-07)