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Check Warner is a Partner and co-founder at Ada Ventures, an early-stage venture capital firm. She is also a prominent advocate for diversity and inclusion within the tech and VC industries, having co-founded Diversity VC.
Check Warner invests in early-stage companies led by diverse founders and operating in overlooked markets. Her investment focus areas include health tech, the future of work, climate tech, consumer applications, and B2B SaaS.
Check Warner works as a Partner and co-founder at Ada Ventures, a leading early-stage venture capital firm based in London, UK.
Check Warner is a Co-founding Partner at Ada Ventures and Co-founder of Diversity VC, based in London, United Kingdom. Prior to establishing her own firm, she held investment roles as an Associate at Seraphim Capital and worked as an investor at Atomico. Through Ada Ventures, Warner focuses on early-stage investments across Europe, recently closing the firm's £100 million Fund III in early 2025 following a £63 million Fund II in 2023. Her portfolio includes seed and Series A investments in technology startups such as Synthesia, Karakuri, and Eiko, alongside notable exits like Thought Machine. She was awarded an MBE in 2022 for her services to diversity in venture capital and holds a degree from the University of Cambridge. Warner currently focuses on funding overlooked founders in emerging sectors encompassing artificial intelligence, climate technology, developer tools, and healthcare.
Check Warner stands as a prominent figure in the European venture capital landscape, serving as a Partner and co-founder at Ada Ventures. Her role is central to the firm's mission of identifying and backing exceptional early-stage companies led by diverse founders and operating in overlooked markets. Ada Ventures, under her leadership, has carved out a unique niche by challenging traditional investment paradigms and championing a more inclusive approach to venture capital.
At Ada Ventures, Check Warner's investment focus spans a wide array of sectors, reflecting the diverse opportunities she seeks to uncover. She actively invests in innovative companies across health tech, the future of work, climate tech, consumer applications, and B2B SaaS. What unites these varied interests is a commitment to supporting founders who are often outside conventional networks, bringing fresh perspectives and solutions to pressing global challenges. Her keen eye for potential extends to businesses that are not only disruptive but also poised for significant societal impact.
Warner's career background is deeply rooted in her passion for fostering diversity and inclusion within the tech ecosystem. Prior to co-founding Ada Ventures, she played a pivotal role in establishing Diversity VC, a non-profit organization dedicated to increasing diversity in venture capital. Her earlier experiences at firms like Downing Ventures and Entrepreneur First provided her with a robust foundation in early-stage investing and company building. This blend of hands-on investment experience and a strong advocacy for change has shaped her unique philosophy as an investor. She believes that true innovation thrives when a broader range of voices and experiences are brought to the table.
Through her work at Ada Ventures, Check Warner has been instrumental in building a portfolio of companies that exemplify this philosophy. While specific investments are numerous and varied, the common thread is a focus on high-growth potential coupled with a commitment to addressing real-world problems. Her approach goes beyond capital; she actively mentors founders, leveraging her extensive network and expertise to help them navigate the complexities of scaling a startup. Her influence extends beyond individual deals, contributing to a broader shift in how venture capital identifies and supports the next generation of entrepreneurial talent. Check Warner continues to be a driving force in making the venture capital world more accessible, equitable, and ultimately, more successful.
