Mistral AI
European frontier AI lab (Paris) building open-weight and commercial LLMs, the Le Chat assistant, and an API platform. ~350 staff. ~12B EUR ($14B) valuation, ASML-led 2025 round.
What is Mistral AI?
Mistral AI is a European frontier AI lab based in Paris and the most valuable AI company in Europe. It builds large language models, releasing a mix of open-weight models (which anyone can download and run) and commercial ones, including the Mistral Large, Medium, and Small families, the smaller Ministral models, and the Mixtral mixture-of-experts models. On top of the models it offers Le Chat, a consumer and enterprise AI assistant positioned for European users, and La Plateforme, an API and developer platform. Mistral was founded in April 2023 in Paris by three French researchers: Arthur Mensch, the CEO, who came from Google DeepMind, and Guillaume Lample and Timothee Lacroix, who came from Meta's AI research lab where they co-authored the original LLaMA paper. The company positions itself as an open, sovereign European alternative to the large US labs. It employs roughly 350 people. After earlier rounds (a 385M EUR Series A in 2023 and a 600M EUR Series B in 2024 led by General Catalyst), Mistral raised a roughly 2B EUR round in 2025 that valued it at about 12B EUR, or $14B, led by Dutch chip-equipment maker ASML, which took an 11% stake; other backers over time include Andreessen Horowitz, Lightspeed, and Nvidia. Its three founders became France's first AI billionaires.
Mission & values
Put frontier AI in everyone's hands with open, portable, and independent models, building an open and sovereign European alternative in AI.
Qualifications
Mistral AI hires at the frontier of AI: research scientists and research engineers (pre-training, post-training, reinforcement learning, evaluation, multimodal), machine-learning and systems engineers (large-scale training and inference infrastructure, GPUs, distributed systems, performance), plus software engineering (platform, backend, frontend, product), applied AI and solutions engineering, product, design, developer relations, and go-to-market and G&A as it scales commercially. Application flow lives at mistral.ai/careers. The bar for research and ML-systems roles is very high, comparable to the other frontier labs, and deep experience with large-model training, inference at scale, or strong publications helps. The company is Paris-headquartered and Europe-focused, with additional presence in other cities; research and many engineering roles are Paris- or hub-anchored or hybrid, while some roles are remote within Europe. Work authorization in France or the EU matters for many roles, so check each posting.
Leadership
Arthur Mensch
Co-Founder & Chief Executive Officer
Co-founded Mistral AI in 2023 and leads it as CEO. Previously a researcher at Google DeepMind. Became one of France's first AI billionaires as the company reached a ~$14B valuation.
Guillaume Lample
Co-Founder & Chief Scientist
Co-founded Mistral AI in 2023. Previously at Meta AI research, where he co-authored the original LLaMA paper that helped launch the open-weight LLM era.
Timothee Lacroix
Co-Founder & Chief Technology Officer
Co-founded Mistral AI in 2023. Previously at Meta AI research and a co-author of the original LLaMA paper. Leads technology and infrastructure.
Hiring process
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1
Apply at mistral.ai/careers
Browse research, ML/systems engineering, software, product, and go-to-market roles and submit through the Mistral careers site.
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2
Recruiter screen
Confirms role fit, target level, location and EU work authorization, and expectations.
About 7 days
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3
Technical or research interviews
Research and ML: deep technical interviews on modeling, training, inference, or systems, sometimes with a paper or project discussion. Software: coding and system design. Very high bar.
About 14 days
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4
Team and cross-functional interviews
Conversations with the team and adjacent functions on depth, collaboration, and fit for a fast-moving frontier lab.
About 10 days
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5
Offer with equity
Offer with base plus equity at the current valuation, aligned to role and location.
About 7 days
Funding
Awards & recognition
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~2B EUR round at a ~12B EUR ($14B) valuation, led by ASML · 2025
Mistral AI
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Founders became France's first AI billionaires · 2025
Bloomberg
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Europe's most valuable AI company · 2026
Mistral AI
Company information
- Industry: Frontier AI / Foundation Models / LLMs
- Location: Paris, France (Europe-focused; some remote)
- Founded: 2023
- Employees: 350
- Website: mistral.ai ↗
- LinkedIn: Company page ↗
- X / Twitter: Profile ↗