September 2025 has been an exciting month for the global startup ecosystem, with innovative companies across Europe, the US, and Asia raising significant funding rounds. At Fundreef, we keep a close eye on early-stage startups, especially those in the pre-seed, seed, and Series A phases, as they are the future trailblazers in technology and innovation. This month, eight standout startups have captured the spotlight, thanks to their visionary founders and the support of prominent investors.
Here’s a closer look at these companies, their funding details, and why they matter.
1. HappyRobot (USA)
- Round: $44M Series B
- Investors: Base10 Partners, Andreessen Horowitz (a16z), Y Combinator, Tokio Marine, WaVe-X, World Innovation Lab (WiL)
- Sector: AI-driven automation for supply chains
HappyRobot is redefining supply chain management with AI-powered agents that optimize logistics and warehouse operations. Their Series B round, led by top-tier investors including Andreessen Horowitz and Y Combinator, underscores the growing investor confidence in AI solutions that drive operational efficiency.
2. ArcaScience (France)
- Round: €7M Seed
- Investors: The Moon Venture, Pléiade Venture, Plug&Play Ventures, Bpifrance, AKKA
- Sector: AI-powered drug development
ArcaScience is leveraging artificial intelligence to accelerate drug discovery and development. By combining cutting-edge AI algorithms with biomedical research, the startup aims to bring novel treatments to market faster. Their seed round demonstrates strong backing from both venture capitalists and industry-specific investors.
3. Conduct (UK)
- Round: $12M Seed
- Investors: Creandum, Lucid Capital, Booom, plus angels from Palantir, Google DeepMind, Workday, and SAP
- Sector: AI agents for legacy IT systems
Conduct is tackling the challenge of modernizing legacy IT infrastructures with AI agents that automate and optimize complex processes. Their seed funding, supported by a mix of VC and top tech executives, is a testament to the startup’s potential to transform enterprise technology.
4. Shop Circle (UK)
- Round: $100M Extended Series B
- Investors: Nextalia Ventures, Primo Capital, CDP Venture Capital, 645 Select Fund (FNDX), FG2 Capital, entrepreneurial family offices
- Sector: AI-first acquisition model for European software companies
Shop Circle is pioneering an AI-first approach to acquiring and scaling software businesses across Europe. The extended Series B funding positions them to accelerate acquisitions and expand their market reach, with backing from a diverse group of investors including venture funds and family offices.
5. Factor2 Energy (Germany)
- Round: $9.1M Seed
- Investors: At One Ventures, High-Tech Gründerfonds, Gründerfonds Ruhr, Verve Ventures, Siemens Energy Ventures
- Sector: Geothermal energy solutions
Factor2 Energy is driving the energy transition with innovative geothermal solutions. Their seed round, led by investors specializing in deep-tech and green energy, reflects the growing demand for sustainable energy solutions in Europe and beyond.
6. Plumerai (UK)
- Round: $8.7M Series A
- Investors: Partech, OTB Ventures, Acclimate Ventures, existing investors
- Sector: Tiny AI for cameras
Plumerai is at the forefront of Tiny AI technology, enabling low-power AI processing directly on cameras. This Series A funding allows them to scale product development and commercial adoption, attracting investors interested in edge AI and computer vision technologies.
7. Leo AI (USA)
- Round: $9.7M Seed
- Investors: Flint Capital
- Sector: AI for mechanical engineering
Leo AI is revolutionizing mechanical engineering by applying AI to design optimization and simulation. With a solid seed round led by Flint Capital, the startup is set to accelerate innovation in industrial engineering and manufacturing.
8. Artificial Societies (UK)
- Round: $5.35M Seed
- Investors: Point72 Ventures
- Sector: AI for social simulations
Artificial Societies is developing AI-driven models that simulate complex social interactions, providing insights for policy-making, urban planning, and market research. Their seed funding from Point72 Ventures highlights the growing interest in AI applications that model human behavior at scale.
Why These Startups Matter
These eight startups exemplify the innovation and ambition driving the global startup ecosystem in September 2025. From AI-powered enterprise solutions to sustainable energy, and from Tiny AI to social simulations, they showcase the diversity of opportunities for investors and early adopters.
At Fundreef, our mission is to connect founders with investors who share their vision. Whether you are looking to invest in the next big AI breakthrough or support startups shaping sustainable technologies, these companies are worth keeping an eye on.
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