The checks are getting bigger, and they are increasingly going to the unglamorous plumbing of AI, not flashy consumer apps.
Together AI — $800M Series C
Together AI raised an $800M Series C led by Aramco Ventures, with participation from Vista Equity, General Catalyst, Nvidia, and Salesforce Ventures. The round pushes the company's valuation past $8.3B. Together AI provides the essential infrastructure layer enabling enterprise teams to train and serve open-source models. Official announcements can be viewed on Together AI.
Fireworks AI — $1.5B Funding
Fireworks AI closed a $1.5B round, marking one of the largest single AI infrastructure raises of the month. The investment reinforces a clear trend: venture capital is backing the operational layer of the AI stack, not just the model labs sitting on top of it. Details are available at Fireworks AI.
Neko Health — $700M Series C
Led by Lightspeed, Neko Health raised $700M in Series C funding. The raise highlights that AI-driven preventive health remains one of the few consumer-facing categories attracting mega-rounds alongside pure infrastructure plays. Learn more via Neko Health.
Chai Discovery — $400M Series C
AI drug discovery platform Chai Discovery secured $400M at a $3.8B valuation. The round was led by Index Ventures, with Sequoia Capital and Kleiner Perkins participating, showing that AI-for-biology continues to command major life-sciences capital. Visit Chai Discovery for company details.
Smaller but Notable Raises
Even Realities: Raised $150M (pre-Series B) for camera-free AI smart glasses, led by Meituan and Tencent. Discover product specs at Even Realities.
Radical Numerics: Closed a $50M seed round for foundational AI research, led by Emergence Capital.
What It Means for You
The infrastructure-over-apps investment pattern has held firm. For developers and founders building on top of the AI stack, capital and emerging tooling are concentrating primarily around the plumbing layer: inference acceleration, training ops, and data pipelines.
