Ariel Harmoko
Ariel Harmoko
CEO & Co-founder @ Artifact AI | EWOR & Sigma² Fellow | Ex-ML Researcher (Cambridge) & Ex-J.P. Morgan | Former Professional Racing Driver (3x National Champion). Currently building agentic AI for accounting.
Projects
Ideas brought to life. A look at the products, companies, and creative works built from the ground up.
Artifact AI (Arti)
Agentic AI platform for accounting and finance professionals that automates bookkeeping, reconciliation, ledger posting, and related workflows. Positioned as a 'system of intelligence' for accounting firms; integrates with QuickBooks, Xero, Sage, NetSuite and provides audit trails and AI scoring.
Feast (home-chef marketplace)
A marketplace for home chefs founded during Ariel's first year at UCL; scaled to ~100 chefs in early months before Ariel refocused on AI and systems engineering.
Cambridge ML Research — medical imaging / diagnostic models
Early machine-learning research at the University of Cambridge on denoising brain tumour MRI scans and related diagnostic ML work; cited as becoming one of the youngest ML researchers at Cambridge (started research in mid-teens).
Internal GPT at J.P. Morgan
Developed an end-to-end LLM pipeline / internal GPT for software developers and equity derivatives traders while at J.P. Morgan (software engineering internship).
In the Spotlight
A collection of articles, interviews, and viral content where achievements have been shared.
Recognitions
Formal validation from the top. A showcase of official awards, grants, and government acknowledgements.
EWOR Fellowship
Fellowship (date unspecified, listed on EWOR)Selected as a Fellow at EWOR, an early-stage founder investor/mentor program supporting high-potential entrepreneurs in Europe.
Sigma Squared (Sigma²) Fellowship
Listed as a Fellow (date unspecified)Fellow at the Sigma Squared Society (Sigma²), a community supporting exceptional young founders and researchers.
3× National Karting Champion (Professional Racing Driver)
Childhood / teenage years (specific years not listed)Three-time national karting champion during youth/teens; repeated public mentions in profiles and interviews as part of Ariel's background.
Artifact AI — $4M Seed led by a16z Speedrun (seed funding)
2025Artifact announced a $4M seed round led by a16z Speedrun with participation from Motive Partners and others — notable funding milestone for the company Ariel leads.
CPA Practice Advisor Innovation Award (Artifact AI)
Oct 2025Artifact AI recognized by CPA Practice Advisor for innovation in accounting automation (listed on Artifact resources).
Work Experience
Key roles that defined the journey.
Co-founder & CEO
Co-founder & CEO (since 2024)Leading product and go-to-market for an agentic AI platform that automates accounting workflows for firms; public launches, U.S. expansion and seed funding led by a16z Speedrun.
Co-founder
c. 2021 - 2024Founded a consumer marketplace for home chefs while at UCL; early traction before pivoting to AI work.
Software Engineering Intern / ML Engineer (Intern)
Internship around 2022-2023Developed an internal GPT / LLM pipeline for software developers and equity derivatives traders while interning at JPMorgan; offered full-time employment but chose to pursue founding.
Machine Learning Researcher (Intern / Research)
Research during sixth form (mid-teens)ML research focused on medical imaging / diagnostic models (e.g., denoising MRI), cited as one of the youngest ML researchers at Cambridge.
Membership
Affiliations and memberships in prestigious organizations and communities.
Selected as an EWOR Fellow, receiving early-stage support, mentorship, and investment guidance.
Member / Fellow of Sigma² (community for exceptional founders and researchers).
Artifact participated in the a16z Speedrun program and subsequently raised seed funding led by a16z Speedrun.
Education
Academic foundation and learning journey.
BSc Computer Science (studies listed)
Undergraduate studies in Computer Science; co-founded Feast in first year before focusing on AI and startups.
A-levels (Further Math, Math, Physics, Economics)
Completed A-levels at Cardiff Sixth Form College with strong results in STEM subjects.
ML Research Intern (non-degree research)
Summer research and ML internships at Cambridge focusing on medical imaging and diagnostics.
Socials
Connect and explore.