Eric Langrognet
About Eric Langrognet
Eric Langrognet is based in the Greater Paris region and is a partner at 50 Partners Impact, a French accelerator for startups with environmental and social impact. Aggregator profiles date that role from 2020. He graduated from CentraleSupélec (Ecole Centrale Paris) in 1993.
Before that he built several organizations around entrepreneurship. Per the me.sh profile, he founded Limpidea in 2003, which trains and coaches people starting new businesses. He co-founded Institut Open Innovation (2014 to 2017), which studied collaboration between large companies and startups. He was CEO of Agility Factory (2016 to 2020), which helped companies recruit developers and helped science PhDs find jobs in digital companies. His LinkedIn headline describes teaching and coaching across management, operations and finance.
Founders who worked with him describe his coaching in LinkedIn recommendations. One says he advised their company from the idea stage through its first fundraise.
Little of his personal angel activity is documented in public sources I could find. HrFlow.ai's founders name him among their early investors, which shows he has backed AI companies personally. NFX Signal lists him as a 50 Partners Impact partner with a stated investment range of $100K to $5.0M and a sweet spot of $1.5M. That range is a third-party listing for his VC role, not a statement from him about his personal angel checks.
HrFlow.ai is the AI investment confirmed on the Lounge deals desk. Lounge lists a $7M Seed round in April 2026. In its own announcement, the company calls the same $7M round a pre-Series A and says it brings total capital raised to nearly $10M. The announcement thanks Eric Langrognet among the investors who backed the company early. It says the capital will fund expansion across the United States and Europe and a second generation of its AI platform.
Through 50 Partners Impact, his stated focus is startups that address environmental and social challenges in France. NFX Signal ranks him in Seed and Series A categories including SaaS, FinTech, analytics, cybersecurity, e-commerce, IoT and retail. He has not, as far as I found, published his own statement of what he looks for in a pitch. Cheque size for his personal angel investments is not public.
- HrFlow.ai: Paris-based API platform (formerly Riminder) that structures resumes, job offers and HR documents for HR software. Named as an investor in its $7M round, listed by Lounge as April 2026.
Investing activity
Eric Langrognet appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $7M. The most recent is HrFlow.ai (Seed, $7M, Apr 2026).
Eric Langrognet most often invests alongside EmergingTech Ventures, 115K, Sophie Serratrice and Jean-Baptiste Rudelle, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Eric Langrognet
Who is Eric Langrognet?
He is a Paris-based entrepreneur, coach and investor. He is a partner at 50 Partners Impact and has founded or led Limpidea, Institut Open Innovation and Agility Factory.
Has Eric Langrognet invested in AI startups?
Yes. He is named among the early investors in HrFlow.ai, an AI talent-data infrastructure company, which announced a $7M round. Lounge lists it as a Seed round in April 2026.
What check size does Eric Langrognet write?
He has not published a personal angel check size. NFX Signal lists a $100K to $5.0M range and a $1.5M sweet spot for him as a 50 Partners Impact partner.
What stage does Eric Langrognet invest in?
NFX Signal ranks him in Seed and Series A categories. The HrFlow.ai round that Lounge lists is a Seed round.
Does Eric Langrognet focus on a particular sector or region?
His firm, 50 Partners Impact, backs startups with environmental and social impact in France. His investment in HrFlow.ai, a Paris-based HR AI company, falls outside that impact focus, so his angel investing may be broader.
How can founders contact Eric Langrognet?
His public profile is on LinkedIn, where he is based in the Greater Paris region. He has not published a personal website or a public pitch process that I could find.
Is Eric Langrognet an angel investor?
Yes. Eric Langrognet invests personally as an angel.
What AI companies has Eric Langrognet invested in?
Eric Langrognet's AI investments include HrFlow.ai. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Eric Langrognet invest at?
In the rounds tracked on Lounge, Eric Langrognet has invested at Seed, with a median round of $7M.
Who does Eric Langrognet co-invest with?
Eric Langrognet's most frequent co-investors on Lounge are EmergingTech Ventures (1 deal), 115K (1 deal), Sophie Serratrice (1 deal), Jean-Baptiste Rudelle (1 deal) and Domnin de Kerdaniel (1 deal).