Synthesia has raised $200 million in a Series E funding round led by Google Ventures, putting the British AI video platform it at a whopping $4 billion valuation.

The move comes as the business develops a new category of products focused on conversational agents designed specifically for organisational learning and upskilling.

The company said that these agents will enable employees to interact with company knowledge in a more intuitive and "human-like" way by asking questions, exploring scenarios through role-play, and receiving tailored explanations rather than "passively consuming training materials."

Synthesia plans to use the funding to build a "category-defining" company that will "transform how employees learn", helping in areas such as enterprise learning and development, knowledge sharing, product marketing, and sales enablement.

As part of the transaction, Synthesia will also facilitate an employee secondary sale in partnership with NASDAQ at the $4 billion valuation, which it said would provide liquidity to long-time team members while enabling them to remain shareholders in the company’s future growth.

“Synthesia was founded on two core beliefs: first, that AI will bring the cost of content creation down to zero," said Victor Riparbelli, Synthesia’s co-founder and chief executive. "And secondly, that AI video provides a better, more engaging way for organizations to communicate and learn."

He continued: "This funding round is about scaling that vision. We see a rare convergence of two major shifts: a technology shift with AI agents becoming more capable, and a market shift where upskilling and internal knowledge sharing have become board-level priorities. We intend to build the defining company at that intersection, by combining our know-how in AI video with our ability to build and integrate AI technologies into products and services that solve real business needs.”

British chancellor Rachel Reeves described Synthesia as a "UK success story" that has created new jobs and opportunities in the country.

"It shows that by backing innovators to start, scale and stay in the UK through better access to finance and generous tax reliefs, we can turn the promise of AI into better-paid jobs and long-term growth across the UK," continued Reeves.

The UK’s technology secretary Liz Kendall and mayor of London Sadiq Khan also praised the news.

"This backing isn't just a vote of confidence in a British AI firm - it's a clear signal of the huge appetite investors have to get behind our AI sector," said Kendall. "With companies like Synthesia calling the UK home, we can go further and faster in our push for AI to bring jobs, growth, and national renewal to hard-working people up and down the country.”

Khan said that having organisations like Synthesia base their headquarters in London will help shape the "next technological wave."

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