Jaroslaw Kutylowski was born in Poland and moved to Germany at 12. He went to school there without speaking German and had started programming at ten. He later studied computer science.
In 2016 he led the team inside Linguee that built a neural translation system. DeepL Translator launched on 28 August 2017 with seven languages: English, German, French, Spanish, Italian, Polish and Dutch. The company behind Linguee was renamed DeepL GmbH.
Portuguese and Russian followed in December 2018, and Kutylowski became CEO in July 2019. Chinese and Japanese were added in March 2020, and 13 more European languages in March 2021 brought the total to 24. DeepL became a Societas Europaea in 2021.
In January 2023 DeepL reached a valuation of €1 billion. In May 2024 it announced a $300 million round at $2 billion. The company launched DeepL Agent in November 2025 and added voice translation in more than 40 languages in April 2026.