About
Mahyad Ghassemi is a two-time Y Combinator founder who previously built SigmaOS, a web browser designed for AI agent workflows that reached over 100,000 users. He currently develops tools for creating AI coworkers through natural language interfaces.
Mahyad @mahyadghassemi
i think people are sleeping on what @theo and his team are building with T3code a lab releases a new model and you can use it right away without switching setup still some way to go with parts of the ui/ux but still one app one setup exactly how you like it let them cook
Jul 30, 2026 Β· β₯ 6
Mahyad @mahyadghassemi
I like that https://t.co/cOatZLwwoU
Jul 9, 2026 Β· β₯ 2
Mahyad @mahyadghassemi
https://t.co/YT8miaW8yo https://t.co/vNt0B1fdka
Jul 7, 2026 Β· β₯ 1
Founder / CEO at SigmaOSYC S21
Intro paths
Mahyad went through Y Combinator (Summer 2021) β any YC alum in your network can reach them through the YC community.
Their group partner at YC was Gustaf Alstromer β the partner who ran SigmaOS's batch and knows the company first-hand. YC profile β
In turn, Mahyad can intro founders to SigmaOS's investors below.
SigmaOS's investors Β· 4
Co-founders at SigmaOS
Founder at OkibiYC S25
Intro paths
Mahyad went through Y Combinator (Summer 2025) β any YC alum in your network can reach them through the YC community.
Their group partner at YC was Gustaf Alstromer β the partner who ran Okibi's batch and knows the company first-hand. YC profile β
In turn, Mahyad can intro founders to Okibi's investors below.
Okibi's investors Β· 3
Co-founders at Okibi