About 20 U.S.-based AI startups have raised more than $100 million in mega-rounds in 2026, less than two months ago.
If the first few weeks of 2026 are any indication, the AI startup market will see another year of monster funding rounds at eye-popping valuations. U.S. AI startups raised more than $76 billion through mega-rounds in 2025, according to a tally by TechCrunch.
Will startups achieve similar success in 2026? Time will tell.
Here are all US-based AI startups that have raised more than $100 million to date.
February
Simile, which builds AI that mimics human decision-making, has raised $100 million in a Series A round led by Index Ventures. The round was announced on February 12th with participation from Hanabi Capital, Bain Capital Ventures, and several angel investors. Anthropic announced a $30 billion Series G funding round on February 12, valuing the AI lab at $380 billion. More than 30 investors participated in this round, including Founders Fund, Coatue, Nvidia, and more. Media generation platform Runway has raised $315 million in Series E funding, valuing the company at $5.3 billion. The funding was led by General Atlantic and announced on February 10th. Nvidia, Fidelity, Felicis and others have also invested. Goodfire, an AI research institute, announced a $150 million Series B round on February 5th. B Capital led the round, with participation from Juniper Ventures, Lightspeed Venture Partners, and Menlo Ventures. This round valued the company at $1.25 billion. Fundamental, an AI research company, announced a $255 million Series A round on February 5th. The round valued the company at $1.4 billion. Investors in this round included Oak HC/FT, Salesforce Ventures, Valor Equity Partners, and QP Ventures. Voice AI company Celebrities has raised $500 million in a Series D round announced on February 4th. The round was led by Sequoia and valued the company at $11 billion.
January
Computing platform PaleBlueDot AI has raised $150 million in Series B funding, valuing the startup at $1 billion. The round was announced on January 28th and was led by B Capital. Conversational AI platform Decagon announced a $250 million Series D round on January 28th. The round was co-led by Coatue and Index Ventures and valued the company at $4.5 billion. AI lab Flapping Airplanes has raised $180 million in a seed round led by Google Ventures, Sequoia, and Index Ventures. The round was announced on January 28th and valued the company at $1.5 billion. Baseten has raised $300 million in Series E funding, valuing the AI infrastructure startup at $5 billion. The round was led by IVP and CapitalG and was announced on January 23rd. AI inference startup Inferact has raised a $150 million seed round just a few months after it was founded. The round was announced on January 22 and valued the company at $800 million. The round was co-led by Andreessen Horowitz and Lightspeed Venture Partners. Cambridge, Massachusetts-based OpenEvidence has raised $250 million in a Series D round for its medical AI chatbot. The round was co-led by Thrive Global and DST Global and was announced on January 21st. This round valued OpenEvidence at $12 billion. AI research institute Human& has raised a huge $480 million seed round, announced on January 20th. Investors in this round include Nvidia, Jeff Bezos, GV, and more. The round valued the young startup at $4.48 billion. SkildAI, which builds AI models to power robots, raised $1.4 billion in a Series C round, valuing the startup at $14 billion. The round was announced on January 14th and was led by SoftBank and Nvidia. Voice AI platform Deepgram has raised $130 million in a Series C round led by AVP, with participation from Tiger Global, ServiceNow Ventures, Madrona, and others. The round was announced on January 13th and valued the company at $1.3 billion. Arena, a large-scale language model evaluation platform, has raised $150 million in Series A funding, co-led by Felicis and UC Investments. The round valued the one-year-old startup at $1.7 billion and was announced on January 6th. Elon Musk’s xAI has started the new year with a bang. AI Research Institute announced a $20 billion Series E round on January 6th. Valor Equity Partners, Fidelity, Qatar Investment Authority and others participated in the round. The company was acquired by Musk’s SpaceX a few weeks later.
