In the third quarter of 2025, North American startup funding demonstrated remarkable resilience, reaching a staggering total of $63.1 billion across seed to growth-stage rounds for companies in the United States and Canada. This figure not only marks a slight increase from the previous quarter but also represents an impressive surge of over $20 billion compared to the same period last year. The data, sourced from Crunchbase, highlights a significant trend: while the global venture capital landscape has shown signs of cooling, the appetite for investment in artificial intelligence (AI) continues to drive robust funding levels in North America.
The dynamics of the funding environment in Q3 reveal that the high levels of investment were primarily fueled by larger funding rounds rather than an increase in the number of deals. In total, 2,276 reported rounds were added to the Crunchbase dataset during this quarter, reflecting a decline from both the previous quarter and year-ago levels. Notably, the number of rounds decreased across all stages except for later-stage investments, indicating a shift in investor focus towards more substantial commitments in established companies.
A striking characteristic of the recent funding landscape is the overwhelming concentration of investment in AI-related startups. According to Crunchbase data, approximately 57% of all North American funding in Q3 was directed towards companies operating within AI categories. This trend underscores the ongoing transformation of various industries through AI technologies, as investors seek to capitalize on the potential of this rapidly evolving sector. The largest round of the quarter was a monumental $13 billion Series F financing for Anthropic, a company specializing in AI research and development. This single investment accounted for more than 20% of the total startup investment in the region during the quarter, highlighting the significance of large-scale funding in shaping the overall funding narrative.
While the headline-grabbing mega-rounds certainly captured attention, they were not the only noteworthy trends observed in Q3. The quarter also saw a notable uptick in early-stage funding, with companies at the Series A and Series B stages collectively raising $15.6 billion. This figure represents the highest tally recorded in the past five quarters, suggesting a renewed interest in nurturing emerging startups. However, it is essential to note that this increase in funding was largely attributed to larger average round sizes rather than an increase in the number of deals. In fact, the number of reported early-stage deals hit a low point for the year during this quarter, indicating a selective approach by investors.
One of the standout early-stage rounds was led by Commonwealth Fusion Systems, which secured an impressive $863 million in Series B2 funding. Although classified as an early-stage round, it is worth noting that Commonwealth Fusion was founded in 2017 and had previously closed its initial Series B tranche nearly four years ago. This highlights a trend where some companies classified as early-stage have already established a significant presence in their respective markets, attracting substantial investments despite their relatively young age.
Other notable early-stage rounds included significant investments in sectors such as quantum computing, AI, and biotechnology. For instance, Quantinuum, a quantum computing startup, raised $600 million in a funding round backed by Nvidia. Additionally, Field AI, an AI robotics platform, announced two rounds totaling $405 million, while Lila Sciences, a scientific intelligence platform, secured a $235 million Series A funding. These investments reflect the growing recognition of the transformative potential of these technologies and the willingness of investors to support innovative solutions in these fields.
In contrast to the positive momentum observed in early-stage funding, the seed stage experienced a contraction in Q3. Investors allocated a total of $4.6 billion to reported North American seed rounds, representing a decline of 25% from the previous quarter. However, it is important to contextualize this decline within the broader funding landscape, as Q2 had set a high benchmark with Thinking Machines Lab securing a record-breaking $2 billion in what is now recognized as the largest seed round of all time. Despite the decrease, the seed stage still saw some notable deals, including Periodic Labs, which raised $300 million for its AI tools designed for scientific experiments. Additionally, Upscale AI and Tala Health each closed on $100 million, demonstrating that there remains a strong interest in supporting nascent companies with promising technologies.
As the quarter unfolded, the overall investment in AI startups reached an impressive $35.7 billion, remaining relatively flat compared to Q2 but nearly doubling the amount invested in the same quarter the previous year. This stability in AI funding suggests that while the pace of investment may not be accelerating dramatically, it is certainly not slowing down either. The sustained interest in AI reflects a broader recognition of its potential to revolutionize industries, enhance productivity, and drive innovation across various sectors.
The exit landscape in Q3 was also noteworthy, with several high-profile initial public offerings (IPOs) capturing significant attention. The most prominent debut of the quarter was Figma, a design software company that made waves with its IPO on Nasdaq. Shares of Figma more than tripled on their first day of trading, although demand has since moderated, leaving the company valued at around $26 billion. Other notable IPOs during the quarter included StubHub, Netskope, and Firefly Aerospace, further underscoring the active exit environment for startups in North America.
While IPO activity was robust, mergers and acquisitions (M&A) activity was somewhat quieter in comparison. Nevertheless, there were still notable transactions, particularly involving major players in the tech industry. Atlassian emerged as one of the more prolific dealmakers, announcing plans to acquire developer AI platform DX for $1 billion and AI browser developer The Browser Company for $610 million. OpenAI also made headlines with its agreement to pay $1.1 billion for product testing startup Stasig, showcasing the ongoing trend of established companies seeking to bolster their capabilities through strategic acquisitions.
Despite the overall positive outlook for startup funding in North America, it is essential to acknowledge that not all sectors are experiencing growth. Biotech funding, for instance, has been trending lower and accounting for a smaller share of total investment. Similarly, cleantech has faced challenges, with funding levels not reflecting the bullish sentiment seen in other areas. This divergence in funding trends highlights the importance of sector-specific dynamics and the varying levels of investor confidence across different industries.
In conclusion, the Q3 2025 funding report paints a picture of a resilient startup ecosystem in North America, driven primarily by the insatiable demand for AI technologies. The significant influx of capital into late-stage and early-stage companies, coupled with the continued interest in AI, underscores the transformative potential of this sector. While challenges remain in certain industries, the overall trajectory of investment suggests a robust and dynamic funding environment that shows no signs of slowing down. As we move forward, it will be crucial to monitor how these trends evolve and shape the future of innovation and entrepreneurship in North America.