Gabriel Synnaeve
About Gabriel Synnaeve
Gabriel Synnaeve is a machine learning researcher based in Paris. <cite index="1-1">He received his PhD in Bayesian modeling applied to real-time strategy game AI from the University of Grenoble in 2012.</cite> <cite index="1-1">He then did a postdoc at École Normale Supérieure in Paris, working on how babies acquire language.</cite>
<cite index="1-1">He joined Facebook AI Research (FAIR) as a postdoctoral researcher in 2015.</cite> <cite index="4-1">By 2023 he was a Research Director on the FAIR team at Meta.</cite> His public work covers reinforcement learning, code generation and large language models. He co-authored Llama 3 and published on Code Llama.
His LinkedIn profile now lists "Stealth" as his current experience. It also shows a post saying he resigned from Meta after 10 years. We found no public detail on what he is building.
We found no public record of a full angel portfolio, such as a Crunchbase or PitchBook investor profile with dated deals. The one investment we could confirm is ZML, listed below. Founders should not assume a regular angel cadence.
On the Lounge deals desk, Synnaeve appears in ZML's $20M seed round from July 2026. <cite index="3-1">ZML is a French company building a chip-agnostic AI inference platform.</cite> <cite index="3-1">The round also included Kima Ventures, LocalGlobe, Kindred Capital, The Twenty Minute VC, AAL VC, Drysdale Ventures, Yann LeCun and Solomon Hykes.</cite>
As a researcher, his background is in model training, reinforcement learning and code generation. That is close to the infrastructure and tooling layer ZML works in. That is our observation, not a stated investment thesis.
Synnaeve has not publicly described his angel strategy, stage preferences or check size, so we do not state any. The ZML deal is a seed round in AI inference infrastructure by a Paris-based team. One deal is too little to infer a pattern.
- ZML: Paris-based startup building a chip-agnostic AI inference platform and the open-source LLMD inference server. Synnaeve took part in its $20M seed round in July 2026.
- ai.meta.com/people/1447559096135307/gabriel-synnaeve
- aws.amazon.com/blogs/machine-learning/code-llama-code-generation-model
- vestbee.com/insights/articles/top-european-funding-rounds-closed-in-ju
- dealroom.co/news/137921-zml-raises-20m-to-run-llms-on-any-chip
- linkedin.com/in/gabrielsynnaeve
- x.com/syhw?lang=en
- alphaxiv.org/@gabriel-synnaeve
Investing activity
Gabriel Synnaeve appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $20M. The rounds are mostly Seed, with a median round size of $20M. The most recent is ZML (Seed, $20M, Jul 2026).
Gabriel Synnaeve most often invests alongside Solomon Hykes, Kindred Capital, Konstantin Vinogradov and Drysdale Ventures, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Gabriel Synnaeve
Is Gabriel Synnaeve an angel investor in AI startups?
He is listed among the backers of ZML's $20M seed round in July 2026. We found no wider public record of his angel investing.
What is Gabriel Synnaeve's background?
He is a machine learning researcher with a PhD from the University of Grenoble. He joined Meta's FAIR lab in 2015 and became a research director there. His LinkedIn lists Stealth as his current experience.
What check size does Gabriel Synnaeve write?
It is not public. He has not stated a check size, and the ZML announcement does not give individual amounts.
Which AI startups has Gabriel Synnaeve invested in?
The one we could confirm is ZML, a French AI inference startup. Other investments may exist but are not publicly documented.
How can founders contact Gabriel Synnaeve?
His public channels are his X account @syhw and his LinkedIn profile. His personal site is syhw.github.io. He has not published guidance on how to pitch him.
Is Gabriel Synnaeve an angel investor?
Yes. Gabriel Synnaeve invests personally as an angel.
What AI companies has Gabriel Synnaeve invested in?
Gabriel Synnaeve's AI investments include ZML. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Gabriel Synnaeve invest at?
In the rounds tracked on Lounge, Gabriel Synnaeve has invested at Seed, with a median round of $20M.
Who does Gabriel Synnaeve co-invest with?
Gabriel Synnaeve's most frequent co-investors on Lounge are Solomon Hykes (1 deal), Kindred Capital (1 deal), Konstantin Vinogradov (1 deal), Drysdale Ventures (1 deal) and >commit (1 deal).
How can founders reach Gabriel Synnaeve?
Founders on Lounge can see Gabriel Synnaeve's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Gabriel Synnaeve to their Investor Pipeline to track the conversation.