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Mystery.org

AcquiredYC S17

San Francisco, US · Founded 2013 · 53 employees · 9 known investors

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Mystery.org creates video-based explanations answering common questions children ask about the world, starting with its Mystery Science collection of elementary science lessons. It serves U.S. elementary schools and children, with a product likened to a visual Wikipedia for kids.

Also known as Mystery Science, Inc. · Mystery Science

ConsumerEdTechMedia & EntertainmentEducationeLearningUnited States of AmericaAmerica / CanadaPartly Remote

Founders & leadership· Y Combinator alumni (S17)

Mystery.org was founded in 2013 by Doug Peltz.

DPDoug Peltz
Doug PeltzFounder
MT
Michelle Tang
HK
Huey KwikDirector of Growth
BG
Bill GreenbaumLead Recruiter
KS
Keith SchachtCEO2013–2021

Investors · 9

Learn Capital✓ confirmed by Mystery.orgAustin · $100K – $20M

How we know: the company's own site · Y Combinator's founder network · Not right? Tell us

Reach Capital✓ confirmed by Mystery.orgSan Francisco · $100K – $12M

How we know: the company's own site · Y Combinator's founder network · Not right? Tell us

500 GlobalreportedPalo Alto · $150K

How we know: Y Combinator's founder network · Not right? Tell us

Burst CapitalreportedSan Francisco · $100K – $2M

How we know: Y Combinator's founder network · Not right? Tell us

Four CitiesreportedNewton

How we know: Y Combinator's founder network · Not right? Tell us

NewSchools Venture FundreportedOakland

How we know: Y Combinator's founder network · Not right? Tell us

Original CapitalreportedMiami

How we know: Y Combinator's founder network · Not right? Tell us

Transmedia CapitalreportedSan Francisco · $250K – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Related companies · 9

Mystery ScienceMystery Science provides a standards-aligned elementary science curriculum with hands-on, phenomena-driven lessons, investigations, and assessments for K-5 students and teachers. Content aligns with state standards and is available in English and Spanish.
ScrimbaScrimba operates an online platform offering coding courses through interactive video lessons, designed to train students for software development careers at low cost.
Teachers Pay TeachersTeachers Pay Teachers is a marketplace where educators share and sell teaching resources and lesson plans. The platform serves teachers and educational institutions seeking classroom materials.
FunctionUp (FanPlay)FunctionUp, now operating as Polaris School of Technology under Classplus, offers outcome-focused engineering education in computer science and AI/ML for Indian students, partnering with UGC universities and delivered by IITians and software engineers. The program combines fundamentals training with paid internships and job placement support in technology fields.
Discovery EducationDiscovery Education provides K-12 educational resources and programs across math, literacy, science, and social studies, supporting core instruction and supplemental learning for grades PreK-12. The company offers adaptive learning tools, immersive experiences, and professional development services for educators and students.
Spark StudioSpark Studio makes an AI conversational partner that helps children practice English speaking through voice interaction. The tool targets students in non-English dominant countries who have classroom exposure to English but lack confidence in real conversation.
CleverClever is a single sign-on platform for K-12 schools that gives students and teachers access to digital learning applications and automates software account setup and updates for district administrators. It is used by half of U.S. K-12 schools.
KidatoKidato operates online classes for K-12 students in Africa with lower student-teacher ratios than traditional public schools, charging significantly less than private institutions while delivering internationally-benchmarked curricula.
EdwinEdwin is an AI-powered virtual English tutor that combines adaptive learning and natural language understanding with pedagogical content and on-demand human instructors to deliver personalized 1:1 English lessons. In early 2020 it merged with MyBuddy.ai to form Buddy.ai, which builds a voice-based English conversation app aimed at children learning English.

Companies working in the same space as Mystery.org.

Legal entities · 1

corporate structure
Mystery Science, Inc.

Frequently asked questions

What does Mystery.org do?
Mystery.org creates video-based explanations answering common questions children ask about the world, starting with its Mystery Science collection of elementary science lessons. It serves U.S. elementary schools and children, with a product likened to a visual Wikipedia for kids.
Who founded Mystery.org?
Mystery.org was founded by Doug Peltz in 2013.
Who are Mystery.org's investors?
Mystery.org's investors include Y Combinator, Learn Capital, Reach Capital, 500 Global, Burst Capital, Four Cities, NewSchools Venture Fund, Original Capital and 1 more.
Where is Mystery.org headquartered?
Mystery.org is headquartered in San Francisco, US.