[1] It offers a paid subscription for additional features and access to its translation application programming interface.

[2] The service uses a proprietary algorithm with convolutional neural networks (CNNs)[3] that have been trained with the Linguee database.

[6][7] In general, CNNs are slightly more suitable for long coherent word sequences, but they have so far not been used by the competition because of their weaknesses compared to recurrent neural networks.

[11] Unlike the free version, translated texts are stated to not be saved on the server; also, the character limit is removed.

[29] In July 2019, Jarosław Kutyłowski became the CEO of DeepL GmbH[30] and restructured the company into a Societas Europaea in 2021.

[12] Support for Chinese (simplified) and Japanese was added on 19 March 2020, which the company claimed to have surpassed the aforementioned competitors as well as Baidu and Youdao.

In December, the company removed access and informed journalists that it was only for internal use and that DeepL Write would be launched in early 2023.