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Mystery.org

AcquiredYC S17

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

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Mystery.org produces video explanations of science and other topics designed for elementary school children, with content initially focused on common classroom questions and expanding to address student-generated inquiries.

Also known as Mystery Science

EdTechEducationeLearningUnited States of AmericaAmerica / CanadaPartly Remote

Founders & leadership· Y Combinator alumni (S17)

Mystery.org was founded in 2013 by Doug Peltz.

DPDoug Peltz
Doug PeltzFounder

Investors · 9

500 GlobalreportedPalo Alto · $150K

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Burst CapitalreportedSan Francisco · $100K – $2M

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Four CitiesreportedNewton

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Learn CapitalreportedAustin · $100K – $20M

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NewSchools Venture FundreportedOakland

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Original CapitalreportedMiami

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Reach CapitalreportedSan Francisco · $100K – $12M

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Transmedia CapitalreportedSan Francisco · $250K – $5M

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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 provides a data integration platform for schools that connects student information systems with educational applications and tools. The company serves K-12 schools and districts seeking to streamline data access and interoperability across their technology ecosystems.
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 provides AI-powered English tutoring combining adaptive learning technology with human instructors, offering personalized one-on-one lessons to students seeking affordable language instruction. The company later merged with MyBuddy.ai to develop Buddy, a mobile voice-based English tutor targeting children globally who need conversational practice to reach fluency.

Companies working in the same space as Mystery.org.

Frequently asked questions

What does Mystery.org do?
Mystery.org produces video explanations of science and other topics designed for elementary school children, with content initially focused on common classroom questions and expanding to address student-generated inquiries.
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, 500 Global, Burst Capital, Four Cities, Learn Capital, NewSchools Venture Fund, Original Capital, Reach Capital and 1 more.
Where is Mystery.org headquartered?
Mystery.org is headquartered in San Francisco, US.