About
Rosie Dallas is a cofounder of Cinni AI, a B2B platform for fashion ecommerce. Previously, she cofounded Fat Llama, which was acquired by Hygglo, and Fancy, which was acquired by GoPuff.
Founder/COO at Fat LlamaYC S17
Intro paths
YC
Rosie went through Y Combinator (Summer 2017) — any YC alum in your network can reach them through the YC community.
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In turn, Rosie can intro founders to Fat Llama's investors below.
Fat Llama's investors · 4
Co-founders at Fat Llama
CE
Chaz EnglanderFounder/CEO
OT
Owen Turner-MajorFounder/CTO
Experience
- Self-employedAngel Investorcurrent2021 — present
- Curve ClubCo-Founder2022 — 2025Greater London
- Cinni AICo-Founder2025
- Encore KitchensCo-Founder2019 — 2024London
- Dotted DesksCo-Founder2015 — 2024London, England, United Kingdom
- Fat LlamaCo Founder (Acquired by Hygglo | YC S17)2016 — 2022
- Fancy (now Gopuff)Founding Investor (Acquired by GoPuff)2020 — 2021London, England, United Kingdom
- WME AustraliaDigital Marketing Manager2014 — 2015Melbourne, Victoria, Australia
Frequently asked questions
- Who is Rosie Dallas?
- Rosie Dallas is a cofounder of Cinni AI, a B2B platform for fashion ecommerce. Previously, she cofounded Fat Llama, which was acquired by Hygglo, and Fancy, which was acquired by GoPuff.
- Where does Rosie Dallas work?
- Rosie Dallas is Founder/COO of Fat Llama.
- What companies did Rosie Dallas found?
- Rosie Dallas founded Fat Llama.
- Where did Rosie Dallas go to school?
- Rosie Dallas studied at Newcastle University (Bachelor's degree); St Peter's School, York.
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Newcastle University mafia7
Also came through, then founded or led a company.
Same school
Also attended Newcastle University72
Chris MorrisProcess Specialist, Exit Readiness at Mayfair Equity PartnersFreya WordsworthAssociate at Nauta CapitalJonny MuskerGeneral Counsel - Europe at Marlin Equity PartnersLiam SymingtonSenior Director at Marlin Equity PartnersAndrewInvestor at Dig Ventures Management LimitedDavid WeekesAssociate at Pangaea Ventures Us Inc.
+ 66 more
Also attended St Peter's School, York2
Shared employers
Also worked at Curve Club1
Also worked at Fat Llama7
Stan WilliamsPartner at Fuel VenturesOphelia BrownManaging Partner at Blossom CapitalJaume Ayats SolerPrincipal at All Iron VenturesZiv ReichertPartner at Latitud VenturesChaz EnglanderFounder/CEO at Fat LlamaArnie EnglanderFounder at Fancy
+ 1 more
