How do we compare to the competition?

DeepL’s networks consistently outperform other translation systems, making ours the world’s best translation machine. Read on to see a quantitative comparison of our system to others or try it out for yourself.

Blind test

100 sentences were translated by DeepL Translator, Google Translate, Microsoft Translator, and Facebook. Professional translators assessed the translations, without knowing which system produced which results. The translators preferred our translations over the competition's by a factor of 3:1. Here are the results of a test run in August 2017:

75%
50%
chosen as best translation
25%
0% English → German English → French English → Spanish
50%
chosen as best translation
25%
0% German → English French → English Spanish → English

We encourage you to test it out yourself.

BLEU scores

Researchers also measure their systems’ translation performance in terms of BLEU scores on specific, predefined test sets.
Our neural network systems achieve scores beyond any yet published:

34   48  
33   47  
32   46  
31   45  
30
BLEU Score
44
29 43
28 42
27 41
26
40
25 newstest2014 English → German 39 newstest2014 English → French
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