49 US AI Startups Raising $100M+ in 2025 | Top Funding

Imagine a single startup raising $40 billion in one go. That's the reality of 2025's AI funding boom, fueling unprecedented technological acceleration across the US. Industry titan OpenAI secured a record-breaking $40 billion round, pushing its valuation to an astronomical $300 billion, while rival Anthropic pulled in a massive $13 billion. It's not just giants; research labs like Thinking Machines Lab launched with a stunning $2 billion seed round, and coding assistant Anysphere nabbed $2.3 billion. This tidal wave of capital signals a massive acceleration in the race for artificial general intelligence and market dominance. The investments are already creating specialized tools, from AI that assists doctors (Hippocratic AI) to platforms that automate legal work (Harvey).