Justin Quan
About Justin Quan
Justin Quan is the CEO and co-founder of Tomo (Tomo.ai), a consumer AI product. His LinkedIn profile lists UC Berkeley College of Engineering as his education and the San Francisco Bay Area as his location.
He co-founded Tomo with Raymond C. Bain Capital Ventures has said publicly that it backs the Tomo team. A post on X describes Quan as having nearly quit several times before Tomo found traction, and says Tomo has raised $5M from investors including Bain Capital Ventures. His advice to founders in that post is to put the product in front of real users sooner than expected.
This page covers the Justin Quan who runs Tomo. Other people with the same name appear on LinkedIn and are not covered here.
Quan is an operating founder who also invests as an angel. The one angel investment we could confirm is Aristotle's seed round in September 2026. We did not find a public count of his angel investments, a fund, or a stated total deployed. We left those out rather than estimate them.
Aristotle is a voice-first AI tutoring platform for students ages 13 to 18. It announced a $5M seed round in September 2026. True Ventures led the round, with Wicklow Capital and a group of angels who work at AI and technology companies. The company's announcement and the Aristotle site list Quan as an angel investor, identified as CEO and co-founder of Tomo.
Before the round, Aristotle ran a closed beta. More than 1,000 students completed more than 1,500 hours of one-on-one tutoring in it. The round is meant to fund product work, hiring and a nationwide launch.
Quan has not published an investment thesis, a target stage or a check size that we could find. Aristotle is a seed-stage AI company, and Quan is a consumer AI founder himself. That suggests he knows consumer and AI products well, but it is not a stated focus. Founders who pitch him are likely to be talking to someone who ships consumer AI and who values early contact with real users.
- Aristotle: voice-first AI tutoring platform for students ages 13 to 18. Quan joined its $5M seed round, announced September 2026 and led by True Ventures.
Investing activity
Justin Quan appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $5M. The most recent is Aristotle (Seed, $5M, Sep 2026).
Justin Quan most often invests alongside True Ventures, Ben Broca, Drew Wadsworth and Wicklow Capital, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Justin Quan
Who is Justin Quan?
Justin Quan is the CEO and co-founder of Tomo, a consumer AI company, and an angel investor in AI startups. He studied at UC Berkeley College of Engineering and is based in the San Francisco Bay Area.
Has Justin Quan invested in AI startups?
Yes. He is listed as an angel investor in Aristotle, a voice-first AI tutoring startup that raised a $5M seed round in September 2026. True Ventures led that round.
What is Justin Quan's angel check size?
He has not published a check size and we did not find one. Ask him directly instead of assuming a range.
What stage does Justin Quan invest in?
The only confirmed investment is a seed round, in Aristotle. He has not stated a stage preference in public.
What does Justin Quan advise founders to do?
In a public post on X, his advice is to get the product in front of real users sooner than you think. That comes from his own experience building Tomo.
Where can founders contact Justin Quan?
He is on X as @justoutquan and on LinkedIn. Both are linked on this page.
Is Justin Quan an angel investor?
Yes. Justin Quan invests personally as an angel.
What AI companies has Justin Quan invested in?
Justin Quan's AI investments include Aristotle. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Justin Quan invest at?
In the rounds tracked on Lounge, Justin Quan has invested at Seed, with a median round of $5M.
Who does Justin Quan co-invest with?
Justin Quan's most frequent co-investors on Lounge are True Ventures (1 deal), Ben Broca (1 deal), Drew Wadsworth (1 deal), Wicklow Capital (1 deal) and Cognition (1 deal).