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Mystery.org (YC S17) — We help kids stay curious by creating better explanations

We started Mystery.org to create better explanations for every question children have about the world. We began with the 150 most common science questions that children ask teachers.

Mystery.org is a Y Combinator company in the Summer 2017 batch. Its directory entry describes it as: We help kids stay curious by creating better explanations. The founder listed is Doug Peltz (Founder) (Y Combinator directory entry, April 28, 2017).

6 more companies from YC Summer 2017 ↓

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Mystery.org

New accelerator entry · 2017-04-28 · the record

Summer 2017
batch
53
people
Growth
stage
United States of America
region
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What the record says

BatchSummer 2017
Announced2017-04-28
StageGrowth
StatusAcquired
Team size53
IndustryEducation
Sub-industryEducation
SectorsEducation, eLearning
RegionsUnited States of America, America / Canada, Remote, Partly Remote
BasedSan Francisco, CA, USA
HiringNo
Founded2013
Previously known asMystery Science

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Also in YC Summer 2017

Same batch, Education first.

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In their words

We started Mystery.org to create better explanations for every question children have about the world. We began with the 150 most common science questions that children ask teachers. We call this collection Mystery Science. Last year, more than 4 million children used Mystery Science in 50% of U.S. elementary schools. In an industry that is plagued by long sales cycles and high barriers to entry, we’ve sold thousands of schools without a single sales person. We’re backed by a great group of investors including Y Combinator, Learn Capital, and Reach Capital. We’re now moving on to all the other questions children have that they’ll never learn in school. In the last 18 months we received over 500,000 questions from children eager for better explanations of the world. Now we’re creating video explanations for every question. You can think of this like a visual Wikipedia for kids. Our goal is to create a generation of better thinkers. We think this is the most important problem to solve in the world today.

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What the Full Report on Mystery.org covers

  1. The Short Answer

  2. Which Company This Is

  3. What They Do, And How The Money Works

  4. Who Runs It, And How To Reach Them

  5. The Money: Funding, Valuation, Runway

  6. Who Pays Them, And Who They Are Up Against

  7. Warning Bells

  8. Sources

    1 cited source found

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Mystery.org: Accepted into Y Combinator Summer 2017
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Permanent URL: https://mentionfox.com/funding/yc-mystery-org
Last updated 2026-10-29
Primary record: Y Combinator directory entry
Mystery.org (YC S17) — We help kids stay curious by creating better explanations. MentionFox, 2026-10-29. https://mentionfox.com/funding/yc-mystery-org