About
Alistair Pullen is a full-stack software engineer with 15 years of experience in LLMs and embeddings. He previously founded Fancy, a YC S20 company acquired by Gopuff, and is currently developing an AI development tool.
Alistair @alistairpullen
Thanks for having me on! https://t.co/lEeEey981S
Jun 27, 2026 · ♥ 23
Alistair @alistairpullen
This is exactly why we @CosineAI are using the compute provided to us by @UKSovereignAI to build a large frontier model trained in Britain. This export control is the first instance of it’s kind but, I think it’s going to become increasingly common as the models improve. https://t.co/qzyOJSGNTl
Jun 13, 2026 · ♥ 154 · ⇄ 23
Alistair @alistairpullen
Big day for us Cosine, very excited to announce this publically and, again, thanks for Sovereign AI for helping make this possible. Lumen Sovereign will be built with input from some of the largest companies in Britain including HSBC, BAE Systems, Babcock International Group, https://t.co/VmGconbS8Y
Jun 8, 2026 · ♥ 48 · ⇄ 6
Founder at CosineYC W23
Intro paths
Alistair went through Y Combinator (Winter 2023) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Tom Blomfield, General Partner at Y Combinator — the partner who ran Cosine's batch and knows the company first-hand. YC profile ↗
In turn, Alistair can intro founders to Cosine's investors below.
Cosine's investors · 2
Co-founders at Cosine
