Which company was the first to implement Neural Machine Translation (NMT) in a widely-used commercial product?

Neural Machine Translation (NMT) revolutionized the language technology industry by significantly improving translation quality compared to earlier statistical methods. The introduction of deep learning to translation marked a turning point for language products and services worldwide. This poll tests your knowledge of product history in computational linguistics and language technology - do you know which major tech company was first to deploy neural machine translation in their commercial translation product?

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Google (in Google Translate, November 2016)
Microsoft (in Bing Translator, March 2016)
DeepL (in DeepL Translator, August 2016)
Facebook (in Facebook Translation, January 2017)