Speak

Speak

AI-powered mobile app for English practice

Overview

Speak provides an AI-powered mobile app for practicing English through realistic, simulated conversations without a live tutor. Users interact with the app to engage in everyday scenarios, and the AI analyzes responses to offer immediate feedback and personalized learning paths. The product operates on a subscription model with multiple tiers, plus potential in-app purchases or premium features, enabling users to learn at their own pace and schedule. What sets Speak apart from competitors is its ability to reproduce natural conversational practice through advanced AI combined with an easy-to-use mobile interface, removing the need for live tutoring. Speak’s goal is to make English learning more accessible and efficient for students and professionals around the world by providing flexible, on-demand practice anytime, anywhere.

YC Company

About Speak

Simplify's Rating
Why Speak is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Consumer Software

AI & Machine Learning

Education

Company Size

201-500

Company Stage

Series C

Total Funding

$165.8M

Headquarters

San Francisco, California

Founded

2015

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Simplify's Take

What believers are saying

  • Seven-day free trial lowers signup friction.
  • Web, iOS, and Android availability widens distribution.
  • Localized English-learning support spans fourteen native-language markets.

What critics are saying

  • OpenAI dependency exposes pricing, quality, and policy risk.
  • Duolingo can bundle speaking practice into its freemium funnel.
  • Annual-only pricing weakens conversion and increases early churn.

What makes Speak unique

  • AI tutor emphasizes speaking out loud from day one.
  • Real-time roleplay simulates workplace and everyday conversations.
  • OpenAI models power personalized audio and text tutoring.

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Funding

Total Funding

$165.8M

Meets

Industry Average

Funded Over

7 Rounds

Series C funding is usually for startups that are doing well and are looking for more money to fuel major growth, such as acquiring other companies, expanding into global markets, or launching new product lines. Investors typically include larger venture capital firms and private equity.
Series C Funding Comparison
Above Average

Industry standards

$50M
$50M
Medium
$62M
SeatGeek
$78M
Speak
$100M
Oura

Benefits

Standard tech startup benefits

Stipends for commuting, fitness, & learning

Annual company offsite.

Growth & Insights and Company News

Headcount

6 month growth

2%

1 year growth

2%

2 year growth

6%
CIO
Apr 11th, 2025
Speak secures Series A funding from Altman

Sam Altman has invested in various sectors including AI, energy, anti-aging, and edtech. He participated in Series B funding for Slope, a B2B payment automation platform, and Wrap, a coding assistant tool. In 2019, he signed a letter of intent to invest $51 million in Rain AI's chip through OpenAI. In 2022, Speak, an AI-based language learning app, received Series A funding from Altman and later secured further investments from OpenAI's startup fund. Recent investments include AirOps, CrewAI, and Exowatt.

36Kr
Jan 3rd, 2025
Speak raises $78M, hits $1B valuation

OpenAI has invested in Speak, a language learning app that emphasizes speaking and listening through generative AI. In December 2024, Speak raised $78 million in a Series C round, led by Accel, reaching a $1 billion valuation. This follows a $20 million Series B round just six months prior. Speak's approach involves AI-generated real-life scenarios for immersive language practice. The app has over 10 million downloads and offers courses in multiple languages, with plans to expand further.

Crunchbase
Dec 13th, 2024
Speak raises $78M, reaches unicorn status

Speak, an edtech startup, raised a $78 million Series C led by Accel, doubling its valuation to $1 billion in under six months. The San Francisco-based company, founded in 2016, uses AI to help users learn new languages and has created over 25 million personalized lessons this year. Speak has raised a total of $162 million.

WowTale
Dec 11th, 2024
AI 영어 학습 '스픽', 1,094억원 시리즈C 투자 유치...유니콘 등극 - 와우테일

 AI 기반 영어 학습 솔루션 ‘스픽(Speak)’을 운영하는 스픽이지랩스코리아가 시리즈C 투자 라운드에서 약 1,094억 원(7,800만 달러)을 유치하며 유니콘 기업으로 진입했다고 11일 밝혔다.

Bloomberg L.P.
Dec 10th, 2024
OpenAI-Backed Language Tutor Startup Doubles Value to $1 Billion

Speak’s app uses an artificial intelligence “conversational partner” to help people become fluent in English.

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