companies

Synthesia

Synthesia is a London-based AI video generation platform for creating studio-quality videos with AI avatars and voiceovers in 140+ languages.

Synthesia is a British AI video-generation company that produces synthetic media, enabling users to generate studio-quality videos with realistic AI avatars and voiceovers in dozens of languages, primarily for enterprise training, communications, and e-learning use cases. Synthesia was founded in 2017 by Victor Riparbelli, Steffen Tjerrild, and academic researchers Lourdes Agapito and Matthias Niessner, drawing on research from UCL, Stanford, TU Munich, and Cambridge. The company is headquartered in London, United Kingdom. The company raised a $90 million Series C in June 2023 led by Accel, valuing it at $1 billion; a $180 million Series D in January 2025 led by NEA, valuing it at $2.1 billion; and a $200 million round in October 2025 led by Google Ventures, valuing the company at $4 billion. Employee headcount grew from roughly 437 in 2024 to an estimated 700-800 by mid-2026, reflecting continued rapid growth of the business.

Founded

1920

Headquarters

Pardubice, Czechia

Sector

applications