StudyStack
StudyStack is a freemium web and mobile study platform that lets users create flashcards and automatically converts them into multiple study games, serving students and K-12 educators with millions of community-generated decks, ad-supported free access, and tiered PRO subscriptions.
- Company typePrivate
- Founded2002
- HeadquartersOklahoma, United States
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What StudyStack does
StudyStack, founded in 2002 and headquartered in Mustang, Oklahoma, operates a web and mobile study platform that lets users create flashcards and automatically generates multiple study activities (flashcards, hangman, word search, crossword, word scramble, fill-in-the-blank, matching games, quizzes, and StudyTable) from the same underlying card data. The platform serves primarily students (ages 13+, plus 12 and under with parental involvement under COPPA) and K-12 educators, with a secondary standardized-test-taker persona spanning SAT, ACT, GRE, MCAT, LSAT, GMAT, USMLE, and professional certification prep. It hosts millions of community-contributed flashcards across business, geography, history, languages, math, medical, science, and standardized test subjects, distributed through its website, Flutter-based iOS and Android apps, an APK direct download, and a developer API that powers third-party integrations with apps such as gFlash+, Kaka Flashcards, POP Quiz, and Quizard.
The business model is ad-supported freemium: the free tier carries advertising and is the primary user acquisition surface, while PRO Basic subscriptions at $10/year or $1.50/month remove ads for personal users, PRO Teacher at $20/year extends ad removal and student progress reporting to educators and their students, and School District Site Licenses package the ad-free experience plus reporting for institutional deployment. Growth is product-led and community-led: users sign up via the website, Facebook Connect, or Clever SSO, teachers can create stacks that students access without accounts, and sharing flows through public profile URLs and direct links. Clever SSO and the rebuilt Flutter mobile app indicate recent distribution and onboarding modernization, but the company remains a 1-10-employee founder-operated entity (founder/owner John Weidner) with no disclosed funding rounds, revenue figures, named enterprise customers, acquisitions, or AI/ML capabilities in the source material.
StudyStack firmographics
Firmographics- Name
- StudyStack
- Legal name
- StudyStack LLC
- Website
- https://studystack.com
- Company type
- Private
- Founded year
- 2002
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- StudyStack is a freemium web and mobile study platform that lets users create flashcards and automatically converts them into multiple study games, serving students and K-12 educators with millions of community-generated decks, ad-supported free access, and tiered PRO subscriptions.
- Ownership category
- akta.pro rank
StudyStack industry classification
Industry- Product category
- Online Learning & Study Software
- NAICS
- Exam Preparation and Tutoring (611691)
- akta.pro primary industry
- General Homework Help (Multi-Subject) (EDANADAA)
- akta.pro secondary industries
- Assessment, Testing & Analytics Platforms (Formative/Summative) (EDAJAMAC), Microlearning Content Libraries (Bite-Sized Lessons) (EDAFACAI)
Keywords
Where StudyStack is headquartered
LocationHeadquarters
- HQ city
- Oklahoma
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
StudyStack business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Operations, Marketing or Sales
Revenue model
- Advertising: The primary revenue stream is advertising on the free version of the platform. StudyStack states it is funded primarily by advertisements to keep the service free for everyone.
- PRO Subscriptions: PRO accounts provide an ad-free experience as a premium tier. Basic PRO costs $10 per year or $1.50 per month. PRO Teacher accounts allow teachers to remove ads for themselves and their students for $20 per year.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free tier with ads |
| Subscription | Annual | PRO Basic - Ad-free experience |
| Subscription | Annual | PRO Teacher - For educators and their students |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels4 records
StudyStack product offering
Product offeringCore offering
StudyStack operates a free online platform where users create, share, and study digital flashcards. From a single set of flashcard data, the platform automatically generates multiple study activities — including hangman, word search, crossword, matching, and other game-based formats — so learners can review the same material in different ways. The service is delivered via web, iOS, and Android applications and is supported by advertising on the free tier plus optional paid subscriptions.
Product overview
StudyStack is a single unified platform for flashcard-based learning that provides a free core service supplemented by paid tiers. The core product enables users to create flashcards and automatically generates multiple study activities including flashcards, hangman, word search puzzles, crossword puzzles, word scrambles, fill-in-the-blank exercises, matching games, and quiz/test activities. The platform is accessible via web and mobile apps (Android/iOS). Paid tiers include StudyStack PRO ($10/year or $1.50/month) for ad-free experience, PRO Teacher ($20/year) for educators with student progress tracking, and School District Site Licenses for institutional deployments.
Differentiator
Problem solved
Functional benefit
Products and services
- StudyStack Web Platform
Companies that use StudyStack
Customer profileSegments3 records
Ideal customer profiles3 records
StudyStack technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
Feature4 records
StudyStack partnerships and signals
Strategic signalScale indicators3 records
Recent moves5 records
Expansion highlights4 records
StudyStack competitors and assessment
Company assessmentDirect peers
- Cram.com: Long-standing flashcard and study-game platform with a similar community-created content model. Directly comparable in age, content approach, and gamified activity generation to StudyStack.
- Anki: Open-source spaced repetition flashcard system serving the same memorizing-and-testing use case as StudyStack. Anki is the gold standard for serious learners (especially medical students) and represents the power-user alternative to StudyStack's gamified approach.
- Brainscape: Commercial flashcard and confidence-based repetition platform targeting students and professionals. Competes directly with StudyStack's PRO tier by offering spaced repetition, progress tracking, and mobile-first study experiences for exam prep.
- Quizlet: The dominant flashcard and study tool platform with millions of user-created study sets across the same subject categories as StudyStack. Offers a near-identical core use case (flashcard creation + study activities) but at significantly greater scale, with AI features and a richer freemium model.
- StudyBlue (Chegg): Formerly independent flashcard and study-notes platform, now part of Chegg. Direct historical competitor to StudyStack in the college flashcard + study-guide category with similar community-generated content model.
Others
- Gizmo (formerly Quizlet Live alternatives): While not a direct flashcard competitor, ExploreLearning Gizmo represents the broader K-12 supplemental learning category where StudyStack competes for student and teacher attention and budgets. Useful as a category-ecosystem comparable.
Broad incumbents
- Kahoot!: Publicly-listed gamified learning platform with much broader scope (quizzes, presentations, trivia) but overlapping teacher-facing use case. Competes for the same teacher budget and student engagement that StudyStack targets with PRO Teacher.
- Chegg: Publicly-traded education platform with homework help, textbook solutions, and study tools. While broader than StudyStack, Chegg competes for the same student budget and exam-preparation use case, especially around standardized tests.
Emerging players
- Memrise: Vocabulary and language-learning flashcard app with spaced repetition and community-created content. Comparable to StudyStack's language category and spaced repetition feature, with a narrower vertical focus.
- Quizizz: Gamified quiz and flashcard platform popular in K-12 classrooms with strong teacher adoption. Overlaps with StudyStack's teacher-led study activity generation use case, though Quizizz emphasizes live/in-class play versus self-study.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
StudyStack social profiles
Digital presenceStudyStack financial estimates
Financial estimateRevenue estimate
Valuation estimate
StudyStack leadership team
Management profileNumber of profiles
Profiles1 record
StudyStack funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
StudyStack M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about StudyStack
What does StudyStack do?
StudyStack operates a free online platform where users create, share, and study digital flashcards. From a single set of flashcard data, the platform automatically generates multiple study activities — including hangman, word search, crossword, matching, and other game-based formats — so learners can review the same material in different ways. The service is delivered via web, iOS, and Android applications and is supported by advertising on the free tier plus optional paid subscriptions.
Is StudyStack a public or private company?
StudyStack is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was StudyStack founded?
StudyStack was founded in 2002. It employs 1 to 10 people.
Where is StudyStack based?
StudyStack is headquartered in Oklahoma, United States, in the North America region.
How does StudyStack make money?
Two revenue lines are on record. Advertising is the primary driver. The others are PRO Subscriptions.
Who are StudyStack's main competitors?
Direct peers on record are Cram.com, Anki, Brainscape, Quizlet and StudyBlue (Chegg). Gizmo (formerly Quizlet Live alternatives) is listed as an others. Broad incumbents are Kahoot! and Chegg. Emerging players are Memrise and Quizizz.
Does StudyStack have an API?
Yes. StudyStack offers an API for developers who want to integrate data from StudyStack's database into their applications. There is no public documentation; developers must contact [email protected] to describe their intended use and request access.
What industry is StudyStack in?
StudyStack's product category is Online Learning & Study Software. Its primary akta.pro industry code is EDANADAA, General Homework Help (Multi-Subject), with a secondary code of EDAJAMAC, Assessment, Testing & Analytics Platforms (Formative/Summative). Its NAICS code is 611691.