Paris Open Source AI Summit (POSAIS) is a dedicated one-day event for the people who build open source AI: not the ones who talk about it, fund it, or market it. The ones who write the code, curate the datasets, publish the weights, and make the hard calls.
It takes place on July 10th at Studio 104, the legendary 800-seat hall at Radio France, one of the most iconic stages in Paris.
No keynotes about "the future." No panels where everyone agrees. Real builders. Real decisions. Real trade-offs.

Open source AI is reshaping the world, but the people who actually build it rarely get a room of their own. They're scattered across labs, companies, and git repositories. They make critical architectural choices with little visibility. They carry the weight of decisions that affect entire ecosystems.
POSAIS exists to change that. To give the builders a stage. To make the invisible work visible. To create the friction that matters: between the people who shipped something last month and the people shaping regulation next year.
Speaking at POSAIS is not "taking the floor." It's taking a stand, helping write the new rules of the game: which architectural choices we defend, which economic models we prove viable, which commons we protect, and which red lines we will not cross.
POSAIS is where the community sees itself clearly. Challenges itself honestly. And pushes the entire ecosystem forward, not to shine alone, but to raise the bar for everyone.

POSAIS is built for three kinds of people:
CTOs, CIOs and engineering leaders: If you've chosen open weights over a proprietary API and shipped anyway. If you're wrestling with model deployment on sovereign infrastructure. If you've spent nights navigating the trade-off between performance and transparency, this day was built for you.
Data scientists and ML engineers: If you've trained, fine-tuned, distilled, and benchmarked models that nobody outside your lab has ever heard of. If you know the real breakthroughs aren't in the press releases. If you care about what's inside the dataset as much as what comes out of the model, this day was built for you.
Researchers and academics: If you believe science means open methods and reproducible results. If you've published your weights, your training logs, your failures. If you think European AI sovereignty starts in a git repository, this day was built for you.
More broadly: POSAIS is for those who build with their hands, not just their opinions. Who make ambitious choices, and sometimes painful ones. Who give before they receive.

POSAIS takes place the day after the RAISE Summit (July 8–9) and the weekend before France's national holiday on July 14th.
If you're already in Paris for RAISE, this is the sharpest reason to stay one more day. If you were planning to be here for Bastille Day, this is the best way to start your weekend. And if you needed a reason to be in Paris in July, now you have three.
The builders will be here. The conversations will matter. The timing is perfect.
Friday, July 10th is yours.