adaptive-learning
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Duolingo Built a Billion-Dollar Habit Out of Five-Minute Lessons
The green owl did not win by promising fluency overnight. It won by making tomorrow's five-minute lesson feel harder to skip than today's - then built subscriptions, testing and AI conversation on top of that habit.
The $25,000 Parenting App That Learned to Stop Pitching Numbers and Start Telling a Story
BabySparks reached millions of parents on a shoestring, then discovered its data-heavy fundraising pitch was the thing holding it back. The fix was not another chart - it was a better story.
The Dental School Dropout Who Turned 1,400 Flashcards Into 27 Million Students
Alec Whitters quit dental school in Iowa to rebuild exam prep on a phone screen. A decade later, roughly half of America's new nurses study on the platform he started - and he did it from a town most investors can't find on a map.
The 40-Year-Old Quiz Company Trying to Become the Operating System for Learning
Renaissance began with a reading quiz built in a Wisconsin basement. Four decades and a string of acquisitions later, it is betting that the next big classroom product is not another app, but a connected path from assessment to action.
The 138-Year-Old Publisher That Learned to Think in Software
McGraw Hill spent more than a century putting knowledge between covers. Its next act is turning that trusted catalog - and billions of student interactions - into adaptive software for classrooms that cannot afford to get the answer wrong.
HMH
It started as a Boston book publisher in 1832. Today HMH wants to be the software layer between the test a student takes and the lesson they get next.
Cengage Group
The company that once filed for bankruptcy owning the textbook now rents you every book it makes for the price of one - and it is quietly rewiring how students, libraries, and job-seekers learn.
Atomi
Atomi is a Sydney-based edtech company that runs an online teaching and learning platform for high school. It pairs short, curriculum-aligned videos with interactive quizzes, AI-driven revision recommendations and real-time analytics, serving students, teachers and schools across Australia and the UK. Founded in 2013 as HSC Hub by Rob Barakat and Thomas O'Donahoo, the company now reaches over a million students and teachers and covers hundreds of subjects across all high school year levels.
EduRev
EduRev (Education Revolution) is a Bengaluru/Gurugram-based Indian edtech company founded in 2015 and backed by Y Combinator (W20). It runs a mobile-first learning platform - pitched as a 'Netflix for Education' - that bundles video lessons, notes, question banks, mock tests, doubt-solving and progress analytics for school students (Class 6-12) and aspirants of competitive exams like NEET, JEE, UPSC, GATE and CAT. Its low-cost annual subscription (roughly $20-$50/year vs competitors' $300+) has drawn a reported 20M+ registered learners.
Excellence
Excellence is a Y Combinator-backed (W25) AI education platform, founded by three Stanford-trained builders, that turns generative AI into a genuine learning tool rather than a homework-answer machine. Designed with teachers, it lets educators generate personalized assignments and exams, create interactive materials, and track student progress, while giving students an AI tutor that asks progressive questions instead of handing over answers. It began as an AI tutor for maths and science aimed at replacing costly private tutoring and long-term programs like Kumon.
Geniebook
Geniebook is a Singapore-based edtech company that pairs a proprietary AI engine with human teachers to deliver personalised learning for primary and secondary students across Southeast Asia. Its platform generates adaptive worksheets that target each student's specific knowledge gaps, streams live online classes led by experienced educators, and offers real-time teacher chat support - all aligned to Singapore's national (MOE) curriculum. Founded by former tutors Neo Zhizhong and Alicia Cheong, the company has grown from an offline tuition business into a regional platform serving more than 220,000 students, and has since expanded into hybrid online-plus-physical learning centres.
Zenius
Zenius was Indonesia's pioneering education-technology company, founded in 2004 as a Jakarta tutoring center and reborn in 2010 as one of the country's first video-based learning platforms. Built around founder Sabda PS's belief that education should teach fundamental skills and critical thinking rather than rote memorization, Zenius grew into a digital learning ecosystem with a library of more than 100,000 video lessons, a large UTBK question bank, AI-powered tools like ZenCore and ZenBot, and live classes. After acquiring legacy tutoring brand Primagama in 2022 to push into hybrid learning, the company struggled with the post-pandemic funding downturn and suspended operations in January 2024 after roughly 20 years.
Flint
Flint is an AI-powered personalized learning platform built for K-12 schools. It lets teachers design AI tutors, activities, and assessments that adapt to each student across every subject - from language speaking practice to guided science labs - while giving educators real-time visibility into student progress without adding to their workload. Founded in 2023 and backed by Y Combinator, Flint raised a $15M Series A in November 2025 and serves hundreds of schools and hundreds of thousands of students worldwide.
SplashLearn
SplashLearn (operated by StudyPad, Inc.) is a game-based learning platform for children in preschool through Grade 5, focused on math and reading. Founded in 2010 by four friends who saw the iPad as a natural learning device for kids, it now serves more than 40 million learners across 150+ countries and is used by hundreds of thousands of teachers and schools. The platform pairs an adaptive, curriculum-aligned library of 6,500+ games and activities with live small-group classes, aiming to turn children into confident, self-motivated learners.
Filadd
Filadd is a Córdoba, Argentina-based edtech company (Y Combinator S21) that helps Latin American students pass college entrance exams and graduate from university. Its platform blends video lessons, live tutoring, AI-powered study plans, and downloadable resources to prepare students for regional exams like Chile's PAES and Brazil's ENEM. Filadd serves more than 25,000 students a year across Chile, Brazil, Argentina, and Colombia.
Classera
Classera is an edtech company that runs a cloud-based Learning Super Platform used across K-12 schools, universities, and corporate and government training programs. Founded in 2011 and headquartered in San Francisco with deep roots in the MENA region, it pairs a core learning management system with gamification, AI-driven personalization, virtual-reality content, an educational marketplace (Edumalls), and embedded payments (C-Pay). The platform serves more than 12 million users in over 40 countries and, in October 2022, raised a $40M Series A led by Sanabil Investments - reportedly the largest edtech funding round in MENA and most of Africa.
NoRedInk
NoRedInk is a K-12 writing platform used in more than 10,000 schools that helps students in grades 3-12 become stronger writers through adaptive, interest-based exercises, scaffolded composition tools, and an AI-powered Grading Assistant that cuts teacher grading time roughly in half. Founded in 2012 by former Chicago English teacher Jeff Scheur, the company builds around a taxonomy of common student writing errors and personalizes practice using topics students actually care about. Students have completed billions of exercises on the platform.
Analytikus
Analytikus is a Miami-based education-technology company that applies machine learning and artificial intelligence to help colleges and universities reduce student dropout, sharpen recruitment, and personalize teaching. Its SEAL platform pulls signals from learning management systems and campus data into a holistic student profile (WHALE), then layers on predictive modules and generative-AI assistants - Emilia and Socrates - to give students 24/7 support and give faculty an early-warning read on who is at risk.
Axio Education
Axio Education is an AI-native learning platform, spun out of Arizona State University's Luminosity Lab in 2023, that helps colleges and universities design, deliver, and improve courses. It combines LMS, CRM, and SIS capabilities with agentic AI to compress course development from months to minutes, deliver personalized learning pathways, and give faculty real-time insight into how students are doing - while keeping instructors in creative control.
Darsel
Darsel is an education-technology nonprofit that teaches K-12 math over the messaging apps students already have. Instead of an app or a laptop, students practice curriculum-aligned questions through SMS, WhatsApp, and Facebook Messenger, and an AI-powered chatbot delivers hints, explanations, and personalized practice while auto-grading homework and reporting progress to teachers. Founded by Stanford MBA and MIT alum Abdulhamid Haidar during the COVID-19 lockdowns, Darsel has grown from a spring-break prototype to a platform used across Jordan, India, and Nigeria, reaching hundreds of thousands of students who have answered hundreds of millions of math questions.
Gooroo
Gooroo is a New York-based education technology company founded in 2015 by Scott Lee that pairs students with vetted tutors through personalized matching and pairs that with a library of self-paced online courses and small-group clubs. Built to make one-on-one tutoring affordable and to celebrate individual learning styles, Gooroo grew a network of NYC tutors, ran a 'Gooroo Gives Back' nonprofit arm for underserved students and seniors, and raised roughly $14M across seed rounds. As of 2026 the company paused consumer enrollments while it evaluates a pivot toward trustworthy, accountable AI for learning and student protection.
Memorang
Memorang is a Los Angeles-based education-technology company building what it calls the AI stack for education - an all-in-one, agentic platform that lets testing providers, publishers and training organizations create standards-aligned content, assessments and branded learning apps at scale. It began as a consumer flashcards-and-quizzes app for medical and professional exams and has since pivoted into a B2B platform that pairs knowledge graphs with AI agents and human-in-the-loop workflows. After winning first place among roughly 1,500 startups in the Vercel AI Accelerator, the bootstrapped company says it has delivered hundreds of millions of assessments and serves tens of millions of annual test-takers.
Super Teacher
Super Teacher is a New York-based edtech company building an AI-powered tutoring app for elementary school students. Founded in 2022 by former Google product manager and NYC math teacher Tim Novikoff, it delivers unlimited, conversational one-on-one tutoring in reading and math for roughly $15 a month - a fraction of the cost of a human tutor. Unlike most AI education tools, Super Teacher avoids large language model guesswork in favor of a deterministic content system designed to always give correct answers. Around 20,000 families have signed up, and public schools in New York, New Jersey, and Hawaii now use the app in classrooms.
Amplify
Amplify is a New York-based K-12 education company that builds core and supplemental curriculum and assessments in literacy, math, and science, all grounded in the science of reading and used to turn student data into instructional support for teachers. Born as Wireless Generation in 2000 and now backed by Laurene Powell Jobs' Emerson Collective, its programs - including Amplify CKLA, Amplify Science, Amplify Desmos Math, Boost Reading, and mCLASS - reach more than 18 million students and teachers across all 50 states.
Honor Education
Honor Education is a San Francisco-based edtech company building a mobile-first, AI-powered learning platform that turns passive online courses into interactive, social experiences. Founded by Joel Podolny, the founding Dean of Apple University, Honor helps universities, enterprises, and nonprofits encode expert knowledge into credentialed programs that learners actually finish - reporting 85% completion rates against a 15% industry average. The company raised a $38M Series A in 2025 and was named to TIME's Best Inventions of 2024.
Slang
Slang is a B2B edtech company that teaches professional, industry-specific English to the global workforce. Born as an MIT research project on using AI and NLP to accelerate language learning, Slang now runs the largest catalog of specialized professional English courses in the world - 200+ paths spanning fields from engineering and finance to healthcare and logistics - delivered through a mobile-first platform used by companies and universities to build hyper-personalized learning journeys by role and industry.
Ello
Ello is an AI reading coach for children in kindergarten through third grade. Through its 'Read with Ello' app, a friendly turquoise elephant listens to kids read aloud, catches mispronounced or skipped words, and offers gentle, phonics-based coaching in real time. Built on proprietary child speech-recognition technology and a library of hundreds of decodable books, Ello aims to give every child the patient, one-on-one reading tutor that has historically been available only to families who can afford it.
Liulishuo
Liulishuo (LAIX Inc.) is a Shanghai-based educational technology company that uses artificial intelligence to teach English. Its flagship app, 'English Liulishuo' (known internationally as LingoChamp), pairs proprietary speech-recognition and deep-learning models with an adaptive curriculum to act as a personal 'AI English Teacher.' Founded in 2012 by three engineers with Google and academic backgrounds, the company grew to tens of millions of registered users and listed on the New York Stock Exchange in 2018.
Brilliant.org
Brilliant.org is an interactive STEM learning platform that teaches math, science, data, and computer science through hands-on problems instead of passive video. Founded in 2012 by Sue Khim, the San Francisco-based company has grown to roughly 10 million learners and operates on a freemium subscription model with 90+ guided courses.
Formation
Formation is a San Francisco–based, A16Z-backed virtual fellowship that trains experienced software engineers to land senior roles at top tech companies. It pairs adaptive AI assessments with one-on-one mentorship from engineers at Meta, Google, Stripe and Airbnb to drill candidates on algorithms, system design and modern AI fluency.