British artificial-intelligence startup Synthesia has raised $200 million in a Series E funding round, nearly doubling its valuation from $2.1 billion a year ago to $4 billion.
The capital injection comes as the London-based company reports surpassing $100 million in annual recurring revenue (ARR) in April 2025, driven by demand for its AI-powered video training platform.
Unlike many AI ventures still navigating the path to profitability, Synthesia has carved out a lucrative niche in corporate training. Its platform enables enterprises to produce interactive learning content featuring AI-generated avatars, a technology now employed by companies such as Bosch, Merck, and SAP.
The funding round, led by returning investor GV (Google Ventures), also included participation from Kleiner Perkins, Accel, New Enterprise Associates (NEA), Nvidia’s NVentures, Air Street Capital, and PSP Growth. New entrants Matt Miller’s Evantic and Hedosophia also joined the cap table.
Part of the Series E involves a structured employee secondary sale, facilitated by Nasdaq’s private markets platform.
This allows early employees to liquidate shares at the $4 billion valuation without the company going public. Synthesia’s CFO, Daniel Kim, described the move as a mechanism “to give employees a meaningful opportunity to access liquidity and share in the value they’ve helped create, while we continue to operate as a private company focused on long-term growth.”
The company plans to expand beyond AI-generated videos into AI agents, designed to let employees interact with corporate knowledge more intuitively. Early pilots reportedly improved engagement and accelerated knowledge transfer, prompting Synthesia to make agents a “core strategic focus,” alongside enhancements to its existing platform.
CEO Victor Riparbelli highlighted the convergence of technological and market trends: “AI agents are becoming more capable at the same time that upskilling and internal knowledge sharing have become board-level priorities.”
Founded in 2017, Synthesia now employs over 500 people, with offices in London, Amsterdam, Copenhagen, Munich, New York, and Zurich. Its coordinated secondary sale is unusual for a British startup but reflects a broader trend among private companies staying private longer, providing structured liquidity for employees while maintaining control over valuation.
Alexandru Voica, the company’s head of corporate affairs and policy, noted that cross-border employee liquidity programs may become increasingly common among UK-based tech firms.
Synthesia’s rapid ascent illustrates the commercial viability of generative AI beyond consumer applications. Analysts note that as AI agents evolve, the market for intelligent, interactive knowledge platforms could expand significantly, potentially redefining internal training and professional development across industries.
