Loïc Houssier leads engineering at Superhuman, the email client Grammarly acquired in 2025, and earlier worked in applied cryptography for France’s defense industry including nuclear submarine systems. On Chain of Thought he explained how his team retrofitted AI into a product whose brand promise is sub-100ms speed, and why they auto-draft every reply but refuse to auto-send.
Open Source AIAI Evaluation & Reliability
Latest episode with Loïc Houssier · EP 59
How Superhuman Built AI Into a 100ms Product | Loïc Houssier
Loïc Houssier, Superhuman ·
Episodes
In their words
Wow, there's so much to be said around this. The first thing about the... I do believe that email will become more and more important in this agentic world. Just think about the move from Cloudflare, where they basically, I would say, build this email for agent so that email can discuss with each other.
How Superhuman Built AI Into a 100ms Product | Loïc Houssier
Quotes lightly edited to remove filler words.