Justin Kan
About Justin Kan
Justin Kan is an American internet entrepreneur and investor. He co-founded Justin.tv, which led to Twitch, and the mobile video app Socialcam. Earlier he founded Kiko, a calendar app funded by Y Combinator in 2005 and sold to Tucows in 2006. Twitch was later acquired by Amazon.
He was a partner at Y Combinator from 2014 to 2017. In 2017 he left to start Zero-F, a self-funded incubator. He then co-founded and ran the legal services startup Atrium from 2017 until it shut down in March 2020.
Since 2020 he has been founder and general partner of Goat Capital. He is also a co-founder of the crypto gaming marketplace Fractal and posts on YouTube.
TechCrunch reported in 2017 that Kan had backed more than 60 startups as an angel, including Cruise Automation, which his brother Dan founded and General Motors later bought. Crunchbase lists 93 personal investments, and NFX Signal lists 111 investments on record. Both counts come from third-party databases and may be incomplete.
When he launched Zero-F, he said he planned to invest between several hundred thousand dollars and $1M to start new projects. He put an initial $200,000 into Whale.
Samepage raised a $4.85M seed round in June 2026 alongside the launch of Samepage Signals, an AI tool that surfaces insights for product leaders. Dealroom lists Craft Ventures, Freestyle Capital and Glasswing Ventures as backers, with Kan and Matt Mullenweg among the angels.
Crunchbase also lists Kan as an investor in a seed round for Yuma AI, announced in October 2024. NFX Signal tags his investments with AI at both Seed and Series A.
NFX Signal shows Kan investing at Seed and Series A. The sectors it tags are AI, robotics, gaming and esports, entertainment and sports, e-commerce, climate tech and health IT. Crunchbase lists a Pre Seed investment in Wabi and several seed rounds. He is based in the San Francisco Bay Area.
NFX Signal lists an investment range of $500K to $3.0M with a sweet spot of $1.8M. That is a third-party profile, and it may reflect Goat Capital as well as personal angel checks. Kan has not published a check size for founders, as far as we found.
- Samepage: AI product intelligence tool; seed round announced June 2026.
- Yuma AI: seed round announced October 2024, per Crunchbase.
- Qualified Health: seed round announced January 2025, per Crunchbase.
- FLORA: Seed and Series A rounds listed on Crunchbase, 2025 to 2026.
- Wabi: Pre Seed round, listed on Crunchbase (Tracxn dates it November 2025).
- Cruise Automation: self-driving company founded by his brother Dan Kan, later bought by GM.
- Whale: Zero-F project in which he invested $200,000 initially, per TechCrunch in 2017.
- en.wikipedia.org/wiki/Justin_Kan
- crunchbase.com/person/justin-kan
- crunchbase.com/person/justin-kan/person_overview_investor/timeline
- signal.nfx.com/investors/justin-kan
- app.dealroom.co/news/note/samepage-launches-signals-and-raises-4-85m-s
- techcrunch.com/2017/03/06/just-kan-zero-f
- cryptorank.io/funds/justin-kan
- finta.ai/blog/2020-11-10-justin-kahn-raising-a-seed-round
Investing activity
Justin Kan 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 Samepage (Seed, $4.8M, Jun 2026).
Justin Kan most often invests alongside Craft Ventures, Glasswing Ventures, Matthew Mullenweg and Freestyle Capital, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Justin Kan
Does Justin Kan invest in AI startups?
Yes. He was an angel in Samepage's seed round in June 2026, and Crunchbase lists a seed investment in Yuma AI. NFX Signal tags AI at Seed and Series A.
What check size does Justin Kan write?
He has not published a check size that we found. NFX Signal lists a range of $500K to $3.0M with a sweet spot of $1.8M. That range may include Goat Capital investments.
What stage does Justin Kan invest in?
NFX Signal shows Seed and Series A, and Crunchbase also lists a Pre Seed investment. He has invested in rounds led by other funds, such as Samepage's seed round led by Craft Ventures.
What is Justin Kan's background?
He co-founded Justin.tv, Twitch and Socialcam, was a Y Combinator partner from 2014 to 2017, and ran Atrium until 2020. He now runs Goat Capital.
How can founders contact Justin Kan?
His public channels are X (@justinkan) and his site, justinkan.com. We did not find a verified LinkedIn URL.
Is Justin Kan an angel investor?
Yes. Justin Kan invests personally as an angel.
What AI companies has Justin Kan invested in?
Justin Kan's AI investments include Samepage. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Justin Kan invest at?
In the rounds tracked on Lounge, Justin Kan has invested at Seed, with a median round of $5M.
Who does Justin Kan co-invest with?
Justin Kan's most frequent co-investors on Lounge are Craft Ventures (1 deal), Glasswing Ventures (1 deal), Matthew Mullenweg (1 deal) and Freestyle Capital (1 deal).
How can founders reach Justin Kan?
Founders on Lounge can see Justin Kan's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Justin Kan to their Investor Pipeline to track the conversation.