Quick answer: 99math is a free, browser-based multiplayer math game for classrooms. A teacher picks a skill, such as multiplication facts or fractions, and launches a game. Students join with a game code (no student accounts needed) and compete in fast rounds on their own devices. The company was founded in Estonia in 2018 by then-teenager Timo Timmi. By 2022 it was serving about 1 million students. It’s free for teachers and schools and makes money from optional subscriptions for parents.
99math at a Glance
| Detail | Information |
|---|---|
| What it is | Multiplayer math fact-practice game |
| Founded | 2018, Estonia |
| Founder | Timo Timmi (age 19 at the time of early funding) |
| CEO (2022) | Tõnis Kusmin |
| Grades | Mainly elementary and middle school (about grades 2–8) |
| Students | About 1 million (2022) |
| Cost for teachers | Free |
| Business model | Optional paid home subscriptions for parents |
| Funding | $2.1M round in 2022 led by Play Ventures |
| Devices | Any device with a web browser |
Sources: GamesBeat, EU-Startups
The Story Behind 99math
99math started in Estonia as an “eSports-style” math competition. Founder Timo Timmi, a gamer who had just finished high school, wanted to make math practice feel more like the games his generation loved. Early on, the startup raised €454,000 (2020). In July 2022 it raised $2.1 million led by Play Ventures, with Flyer One Ventures and Change Ventures, when it had about 1 million students who had solved more than 600 million problems (GamesBeat).
How a 99math Game Works
- The teacher creates a free account at 99math.com.
- Choose a skill, such as addition, subtraction, multiplication, division or fractions, and the difficulty level.
- Launch the game. 99math generates the problems automatically, so there’s no prep.
- Students join with a game code on a laptop, Chromebook, tablet or phone. They don’t need to create accounts.
- Students compete in quick timed rounds, earning points for correct answers.
- See results: after the game, teachers get a summary of how the class and individual students did.
Why kids like it: fast rounds, leaderboards and a game feel make repetitive fact practice more fun.
What Teachers Use It For
- Math fact fluency: quick, repeated practice of core facts
- Warm-ups and exit activities: a few minutes at the start or end of class
- Spotting gaps: results show which facts or students need more practice
- Homework or home practice: where available, students can practice outside class
Is 99math Free?
For teachers and schools, yes. 99math has said it’s free for classroom use. The company makes money from optional home subscriptions aimed at parents who want extra practice for their kids (GamesBeat). Check 99math.com for current plans and prices.
Privacy and Safety
Students join classroom games with a code instead of an account, which limits the personal data shared. Schools and parents should still review 99math’s current privacy policy and terms on its website, and follow their district’s approval process for edtech tools.
99math vs. Other Classroom Tools
| Tool | Focus | Best for |
|---|---|---|
| 99math | Math facts, live multiplayer | Quick, competitive fact practice |
| Prodigy Math | Math, role-playing game | Longer, adaptive individual play |
| Kahoot! | Any subject, quiz games | Teacher-written quizzes across subjects |
| Blooket | Any subject, game modes | Varied game formats for review |
Tips for Teachers
- Keep games short. A few rounds keep energy high.
- Mix in individual goals. Celebrate personal improvement, not just the fastest students.
- Use results to group students for targeted practice.
- Check devices and internet before class to avoid delays joining.
FAQs
What is 99math? A free multiplayer math game for classrooms where students compete in fast rounds of math practice.
Is 99math free? Yes for teachers and schools. Optional paid subscriptions are offered for parents.
Do students need an account? No. Students join a teacher’s game with a code.
What grades is 99math for? Mainly elementary and middle school, about grades 2–8.
Who created 99math? Estonian founder Timo Timmi, who started it in 2018 as a teenager.
What devices does 99math work on? Any device with a web browser, including Chromebooks, tablets, laptops and phones.
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This article is not affiliated with 99math. Company details were checked on October 3, 2026; user figures are from 2022 reporting.
