Synthesia

Synthesia is among the UK AI companies counted in the seven unicorns minted during Q1 2026, as UK venture capital reached $7.8bn in the quarter, up 60% year on year and representing 41% of the European total. The company's trajectory illustrates both the scale of ambition and the concentration risk in the UK AI cohort: it sits at the premium end of a market where mega-rounds above $100m accounted for 65% of total capital deployed.

Synthesia is a London-based AI video generation platform founded in 2017 by Victor Riparbelli and Steffen Tjerrild, alongside academic co-founders. The company's core product enables users to create professional-quality video content using AI avatars and synthetic voices, without cameras, studios, or production crews. Its primary market is enterprise learning and development, internal communications, and marketing: customers include major corporations using Synthesia to produce multilingual training videos at scale. The platform supports more than 140 languages and offers a library of AI presenters.

Synthesia is one of a small number of European startups to achieve unicorn status in the AI video sector, placing it alongside US competitors such as HeyGen in a market where synthetic-media ethics are under active regulatory scrutiny. The UK's AI Safety Institute has examined the risks of AI-generated video in the context of disinformation and electoral Integrity. Synthesia's own approach has included publishing responsible-use guidelines and refusing to generate content depicting real public figures without consent, a commercial differentiator as regulation tightens across both the UK and EU.