Ello vs Duolingo
Side-by-side comparison of AI visibility scores, market position, and capabilities
SF AI reading coach for K-3 children at $15M Goodwater Capital Series A Sep 2023; #5 Fortune Change the World List 2024, TIME Best Invention 2023;
About
Ello is a San Francisco-based AI reading coach for young children — backed with $15 million in Series A funding in September 2023 led by Goodwater Capital — providing children in grades K-3 (ages 4-8) with a personalized reading tutoring experience that combines the world's largest child speech AI dataset with a library of decodable books to deliver individual phonics coaching through a subscription service ($24.99/month, five physical books shipped monthly). Named #5 on Fortune's Change the World List 2024 and one of TIME's Best Inventions of 2023, Ello's AI reads along with children in real time — detecting when a child misreads or struggles with a word, providing immediate corrective audio prompting, and adapting the difficulty of reading practice to each child's current phonics level. Founded to address the US childhood literacy crisis affecting approximately 16 million 4-8-year-old children learning to read.
Pittsburgh gamified language learning (NASDAQ: DUOL, $17.7B market cap); Q3 2025 $400.2M revenue with 47.7M DAU +40% YoY and 2025 guidance raised to $1.68B; Chess course 1M+ DAU competing with Babbel for consumer language EdTech.
About
Duolingo is a Pittsburgh, Pennsylvania-based language learning platform — publicly traded on NASDAQ (NASDAQ: DUOL) at approximately $17.7 billion market capitalization as of mid-2025 — providing 130+ million monthly active users with gamified language and education courses in 42 languages plus mathematics, music, and chess. In Q3 2025, Duolingo reported $400.2 million in revenue (+9% year-over-year), 47.7 million daily active users (+40% YoY), and 10.9 million paid subscribers (+37% YoY), raising full-year 2025 guidance to $1.68-1.69 billion — versus $748 million in 2024 revenue. The Chess course launched in 2025 surpassed 1 million daily users. Duolingo Max and Super Duolingo premium subscriptions provide AI-powered features including GPT-4-powered conversational practice (Duolingo Max) with roleplay scenarios and AI explanations. Duolingo employs 800+ people with >90% annual employee retention. Founded 2011 by Carnegie Mellon professor Luis von Ahn and Severin Hacker; NASDAQ IPO July 2021 at $3.7 billion valuation.
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