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DeepL 2021: A year in review

With a few days left before the holiday season begins, we want to reflect on our journey over the past 12 months. Our 230-strong team, spread across four different countries, worked extremely hard to realize our mission—breaking down language barriers and bringing cultures closer together.

By adding 13 new languages to DeepL Translator earlier this year, we reached 105 million more native speakers worldwide and provided them with natural-sounding, high-quality translations. All thirteen languages are now available on, via the DeepL API, and in our desktop and mobile apps.

We also enhanced the file translation feature by adding PDF as a file format. Over 70% of DeepL Pro users requested it in early 2021. And when our users ask, we listen! After releasing it to the public, PDF is now the most popular file format translated on DeepL.

Whether you use DeepL in a professional setting or after hours, we want to ensure you can always access our high-quality translations. With the release of our first mobile app for iOS, you can now use DeepL's core functionality on the go. Download the app for free here. Android users shouldn't feel left behind. Our team is currently developing the Android app, which is scheduled for release in Q1 2022.

As we grow and welcome more new users year over year, we continuously strive to add new languages and further improve the translation quality provided by our neural networks. This includes advances in the architecture, training methodology and efficiency of the neural networks as well as the intelligent usage of the data that is used in the networks’ training.

Last but not least, we continued to invest in our API products this year to enable developers with advanced features. With the recent release of glossary support for the DeepL API, users can specify their translations for words or phrases and customize their translations consistently and at scale. Furthermore, to make it easier for developers to build with the DeepL API, we also released official client libraries in Python and .NET. Read more in the API documentation.

On this note, we'd like to thank you for using DeepL. If there's something you've always wanted to see in our product, click here to let us know.

We wish you a wonderful holiday season and a great start into the new year!