Find your path to Justin
476 people in our graph share verified history with Justin — schools, employers, funds. One of them is your warm intro.
About
Co-founder of Den, which develops AI agents that learn from user conversations to handle communications on behalf of their owners via text or phone.
Co-founder at DenYC X25
Intro paths
Justin went through Y Combinator (Spring 2025) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Tom Blomfield, Monzo and GoCardless co-founder; Y Combinator partner on leave and Anthropic compute-team member. — the partner who ran Den's batch and knows the company first-hand. YC profile ↗
In turn, Justin can intro founders to Den's investors below.
Den's investors · 2
Co-founders at Den
Experience
- Den (YC X25)Co-Foundercurrent2025 — present
- Lyrebird HealthFounding Engineer2023 — 2025
- AtlassianSoftware Engineer2024 — 2025
- AffindaIntern2023
Frequently asked questions
- Who is Justin Lee?
- Co-founder of Den, which develops AI agents that learn from user conversations to handle communications on behalf of their owners via text or phone.
- Where does Justin Lee work?
- Justin Lee is Co-founder of Den.
- What companies did Justin Lee found?
- Justin Lee founded Den.
- Where did Justin Lee go to school?
- Justin Lee studied at Y Combinator; University of Melbourne (Bachelor of Science - BS, Computer Science); St Leonard's College.
Founder mafias
Y Combinator mafia10,230
Also came through, then founded or led a company.
+ 10,223 more
University of Melbourne mafia97
Also came through, then founded or led a company.
+ 90 more
Lyrebirdhealth mafia2
Also came through, then founded or led a company.
St Leonard's College mafia2
Also came through, then founded or led a company.
Same school
Also attended Y Combinator2,000
+ 1,994 more
Also attended University of Melbourne385
+ 379 more
Also attended St Leonard's College3
Shared employers
Also worked at Den (YC X25)1
Also worked at Lyrebird Health4
Also worked at Atlassian107
+ 101 more