Unlike the free version, translated texts are stated to not be saved on the server and the character limit is removed. It offers a paid subscription called DeepL Pro, which has been available since March 2018, and includes application programming interface access and a software plug-in for computer-assisted translation tools, including SDL Trados Studio.

pptx) and PDF files can also be translated. Microsoft Word and PowerPoint files in Office Open XML file formats (.docx and. The translator can be used for free with a 5,000 characters limit per translation. The weaknesses at DeepL are compensated for by supplemental techniques, some of which are publicly known. In general, CNNs are slightly more suitable for long, coherent word sequences, but have so far not been used by the competition due to their weaknesses compared to recurrent neural networks.

The translation is said to be generated using a supercomputer that reaches 5.1 petaflops and is operated in Iceland with hydropower. According to the developers, the service uses a newer, improved architecture of neural networks, which results in a more natural sound of translations compared to competing services. The service uses a proprietary algorithm with convolutional neural networks (CNNs) that have been trained with the Linguee database. It offers a paid subscription for additional features and access to its translation application programming interface.

Its algorithm uses convolutional neural networks and an English pivot. It initially offered translations between seven European languages and was gradually expanded to support 31 languages. The translating system was first developed within Linguee and launched as entity DeepL. DeepL Translator is a neural machine translation service launched in August 2017 and owned by Cologne based DeepL SE.

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