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One Month

DefunctYC S13

New York City, US · Founded 2013 · 1 employees · 12 known investors

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One Month offers online courses in computer programming, coding, and business skills, including Ruby, Rails, Python, JavaScript, and project management. The platform teaches beginners and developers through expert-led courses aimed at accelerating their careers.

Also known as One Month, Inc. (was Mr Ruby, Inc)

Developer ToolsEdTechEducationVideoUnited States of AmericaAmerica / CanadaFully Remote

Founders & leadership· Y Combinator alumni (S13)

One Month was founded in 2013 by Mattan Griffel and Chris Castiglione.

MGMattan Griffel
Mattan GriffelCo-Founder & CEO2013–2017Mattan Griffel studied philosophy and finance at New York University and co-founded Ophelia, a Y Combinator-backed opioid recovery platform. He is faculty at Columbia Business School and an Innovation Fellow at the Lang Center for Entrepreneurship.30 Under 30 2015
CCChris Castiglione
Chris CastiglioneCo-founder & CEO2017–2021Chris Castiglione is a co-founder of Console.xyz and teaches as an adjunct professor at Columbia Business School.

Investors · 12

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us

Andreessen HorowitzreportedMenlo Park · $500K – $50M

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

Avlok CapitalreportedLynnwood

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General CatalystreportedSan Francisco · $30M

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Maverick VenturesreportedSan Francisco · $3M – $10M

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Sinovation VenturesreportedBeijing

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Stanford UniversityreportedStanford

How we know: a partner's Signal profile · Not right? Tell us

Start Capitalreported

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Wallace Investment GroupreportedBoston

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WefunderreportedSan Francisco

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Winklevoss CapitalreportedNew York · $100K – $5M

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Related companies · 8

Career KarmaCareer Karma helps individuals explore and compare career training programs and matches them to education pathways based on their interests, financial needs, and learning preferences. It covers fields ranging from tech and AI to skilled trades and other careers.
KnowlifyKnowlify converts documents, blog posts, and ideas into narrated, animated videos for corporate teams. The platform serves compliance training and LMS use cases, offering both self-service video creation and full-service production.
Fullstack AcademyFullstack Academy provides immersive online bootcamps and short courses in technology skills including full-stack development, data science, cybersecurity, and digital marketing for corporate teams and individual learners. The company serves Fortune 500 companies and professionals seeking to upskill or transition into tech roles.
GolpoGolpo Video is an AI-powered tool for creating whiteboard explainer videos from prompts or documents. The platform targets content creators and professionals who need to produce video content efficiently.
TaroTaro operates a community platform where software engineers access educational content and career development resources while tech companies use the service to source and recruit engineering talent.
CourseGuideCourse Report is an information and research platform that covers immersive technology education programs, providing reviews, research reports, and guidance for students choosing coding bootcamps.
GoodkindGoodkind provides a communications platform that colleges and universities use to reach students through channels including SMS, video, chat, and mail. It serves higher education institutions managing student outreach.
KiteKite is a screen recording tool that automatically enhances recordings with zooming, 3D animations, and device mockups to create polished product demonstration videos. It serves software companies and product teams who need to produce marketing and educational video content.

Companies working in the same space as One Month.

Legal entities · 2

corporate structure
One Month, Inc.
One Month, Inc. (was Mr Ruby, Inc)

Frequently asked questions

What does One Month do?
One Month offers online courses in computer programming, coding, and business skills, including Ruby, Rails, Python, JavaScript, and project management. The platform teaches beginners and developers through expert-led courses aimed at accelerating their careers.
Who founded One Month?
One Month was founded by Mattan Griffel, Chris Castiglione in 2013.
Who are One Month's investors?
One Month's investors include FundersClub, Y Combinator, Andreessen Horowitz, Avlok Capital, General Catalyst, Maverick Ventures, Sinovation Ventures, Stanford University and 4 more.
Where is One Month headquartered?
One Month is headquartered in New York City, US.