Portrait of Guillaume Luccisano

3-time YC founder

Guillaume Luccisano

Founder & CEO at Yuma AI

The AI agent layer for commerce CX.

Previously co-founded Socialcam (acquired by Autodesk for $60M) and Triplebyte (raised $50M, acquired by Karat).

3-time Y Combinator founder. 90+ angel investments.

https://yuma.ai

About

I moved to San Francisco from France in my early twenties, chasing the startup dream. I got lucky fast. As an early engineer at Justin.tv, now Twitch, I met Michael Seibel and Justin Kan. Together with Michael and Ammon Bartram, I co-founded Socialcam (YC W12), which we sold to Autodesk for $60M in 2012. I was 25.

After that, I co-founded Triplebyte (YC S15), a technical hiring platform that raised $50M and was later acquired by Karat in 2023. I ran that for years before leaving during Covid and spending time in France, then Singapore.

In 2022, I started Yuma AI (YC W23). We’re building the AI agent layer for commerce CX. Our thesis is simple: every brand will fully automate their customer experience within the next few years, and we’re building the infrastructure that makes that happen.

We started working with LLMs before ChatGPT was publicly available, using OpenAI’s Davinci model in late 2022. Yuma launched the same week as ChatGPT. We were delivering AI agents at scale in 2023, way before it was cool.

Yuma now serves 100+ brands with a 30-person team across Boston and Barcelona. Our best merchants automate 93% of their customer interactions.

I moved to Boston in 2024 to bridge our US and European operations. Outside of work, I’m a father of 4 daughters. I’ve lived in France, San Francisco, Singapore, and now Boston, where my family and I have settled.

I’ve also made 90+ angel investments across the US and France, largely as a way to give back to the startup community.

Current

Yuma AI (2022 - present), Founder & CEO, Boston, MA
The AI agent layer for commerce CX. YC W23. 100+ brands trust Yuma to handle their customer conversations autonomously. We started building with LLMs before ChatGPT existed, and were among the first companies deploying AI agents in production at scale. Our best merchants automate 93% of their customer interactions. 30-person team across Boston and Barcelona.

Previous

Triplebyte (2015 - 2020), Co-Founder & CTO, San Francisco, CA
Technical hiring platform. YC S15. Raised $50M. Acquired by Karat in 2023.

Socialcam (2011 - 2012), Co-Founder & VP Engineering, San Francisco, CA
Social video app. YC W12. Acquired by Autodesk for $60M.

Justin.tv / Twitch (2010 - 2011), Software Engineer, San Francisco, CA
Early engineering team. Full-stack Ruby on Rails.

Angel Startup Investments

I’ve made 90+ angel investments across the US and France, largely as a way to give back to the startup community.

I’m hands-off by default and helpful when asked.

Some of the startups:

Thoughts

I write about AI agents, commerce CX, and where software is headed.

FAQ

Who is Guillaume Luccisano?

Guillaume Luccisano is a 3x Y Combinator founder and the CEO of Yuma AI. He previously co-founded Socialcam (acquired by Autodesk for $60M) and Triplebyte (acquired by Karat), and was an early engineer at Justin.tv (now Twitch). He has made 90+ angel investments including Algolia, Airbyte, and Gorgias.

What is Yuma AI?

Yuma AI is the AI agent layer for commerce CX. It automates customer support, sales, and social interactions for brands and retailers using AI agents that achieve up to 93% automation for top merchants. Yuma integrates with Gorgias, Zendesk, Kustomer, Gladly, Freshdesk, Front, and Re:amaze.

When was Yuma AI founded?

Guillaume started building Yuma in late 2022, working with OpenAI's Davinci model before ChatGPT was publicly available. Yuma launched the same week as ChatGPT and went through Y Combinator's W23 batch, making it one of the earliest AI agent companies in production.

Where is Guillaume Luccisano based?

Guillaume is based in Boston, Massachusetts. He grew up in France, spent a decade in San Francisco, lived in Singapore, and moved to Boston in 2024 to bridge Yuma's US and European operations. His team of 30 is split between Boston and Barcelona.

What does Guillaume Luccisano invest in?

Guillaume has made 90+ angel investments across the US and France. Notable portfolio companies include Algolia, Airbyte, Yubo, Human Interest, Gorgias, Polar Analytics, The Bot Company, Lindy, Stepful, and Vellum. Notable exits include Sqreen (acquired by Datadog) and Datakalab (acquired by Apple).

How does Yuma AI compare to other AI customer service tools?

Yuma AI focuses exclusively on commerce brands and retailers, achieving automation rates up to 93% through a proprietary orchestration layer that combines flexible AI agents with strict workflow automation. Unlike general-purpose AI tools, Yuma's deep commerce integrations and 3+ years of domain-specific training data enable it to handle complex scenarios like multi-product catalogs, subscription management, and omnichannel support across 7 helpdesks.

Contact

Gmail: guillaume.luccisano