44 US AI Startups That Raised $100M+ in 2024: The AI Investment Surge

As we approach the close of 2024, it's clear that the AI revolution is not slowing down. While some industries face AI fatigue, venture capital investors remain steadfast, pouring billions into artificial intelligence startups across the United States.

In the third quarter alone, AI startups raised a staggering $18.9 billion, accounting for 28% of all venture funding this year. Highlighting the sheer scale of investment, OpenAI closed the largest venture funding round ever, raising $6.6 billion—one of six AI mega-rounds exceeding $1 billion in 2024.

Here’s a breakdown of US-based AI startups that raised $100M or more this year, organized by month:

November Highlights

• Physical Intelligence: $400M Series A for foundational software for robots. Valuation: $2B.
• KoBold Metals: $491.5M for AI-driven resource exploration.

October Highlights

• OpenAI: $6.6B, marking the largest venture round ever. Valuation: $157B.
• Sierra: $175M for enterprise AI chatbots. Valuation: $4.5B.
• Lightmatter: $400M for photonic computing. Valuation: $4.4B.
• Poolside: $500M for AI-powered software development. Valuation: $3B.

September Highlights

• Glean: $260M for enterprise search solutions. Valuation: $4.5B.
• Safe Superintelligence: $1B for AI research. Valuation: $4B.

August Highlights

• Groq: $640M for AI chips. Valuation: $3B.
• Magic: $320M for AI coding tools.

July Highlights

• World Labs: $100M for physical AI models. Valuation: $1B.
• Hebbia: $130M for generative AI document search.

June Highlights

• AlphaSense: $650M for market intelligence. Valuation: $4B.
• xAI: $6B for AI accelerating scientific discovery. Valuation: $24B.

April Highlights

• Xaira Therapeutics: $1B for AI drug discovery.
• Augment: $227M for AI coding assistance.

February Highlights

• Figure: $675M for robotics innovation. Valuation: $2.7B.
• Lambda: $320M for deep learning infrastructure.

AI’s Big Picture in 2024

This year has solidified AI's position as a defining force in technology and venture capital. Whether advancing robotics, healthcare, enterprise solutions, or foundational models, AI startups are capturing the attention and wallets of top-tier investors.

As we move into 2025, the challenge and opportunity lie in leveraging these investments to create meaningful, transformative solutions while navigating ethical considerations and societal impacts.

?? Which of these AI startups excites you the most? Let’s discuss the future of AI in the comments!

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