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Cubby
7 known investors
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Cubby is an AI teaching assistant for law students that trains on a specific professor's teaching, testing, and grading style using uploaded course materials to generate briefs, quizzes, and practice exams with rubric-based feedback. Its closed-system AI assistant, Donna, answers legal questions grounded in the student's own materials, and the product is developed with law school faculty advisors.
Founders & leadership
Investors · 7
How we know: a partner's Signal profile · Not right? Tell us
How we know: techcompanynews.com · Not right? Tell us
How we know: a partner's Signal profile · Not right? Tell us
Also in the syndicate · 2
Funding
SEC filings, press & company announcements$63M disclosed across 1 of 2 rounds · 2026
- Undisclosed amountSeries AFeb 2026
Goldman Sachs Alternatives (lead)
Source ↗ - $63MSeries AJan 2026 · 4 sources
Growth Equity at Goldman Sachs Alternatives (lead), Bienville, Fractal Software, Third Prime
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Frequently asked questions
- What does Cubby do?
- Cubby is an AI teaching assistant for law students that trains on a specific professor's teaching, testing, and grading style using uploaded course materials to generate briefs, quizzes, and practice exams with rubric-based feedback. Its closed-system AI assistant, Donna, answers legal questions grounded in the student's own materials, and the product is developed with law school faculty advisors.
- Who founded Cubby?
- Cubby was founded by Truman Sacks.
- Who are Cubby's investors?
- Cubby's investors include Ludlow Ventures, Bienville Capital, Fractal Software, Positive Sum Capital, Third Prime.
- How much funding has Cubby raised?
- Cubby has disclosed $63M raised across 1 of its 2 known rounds.