Which major tech company first implemented Neural Machine Translation (NMT) in its public translation service, marking a revolutionary improvement in machine translation quality?

In the world of language technology, translation tools have undergone revolutionary changes. One of the most significant advancements was the shift from statistical machine translation to neural machine translation systems, dramatically improving accuracy and fluency of automated translations. This innovation transformed how global businesses communicate and forever changed the language services industry. Test your knowledge about this pivotal product innovation in linguistics technology!

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Google (with Google Translate in late 2016)
Microsoft (with Bing Translator in 2015)
Facebook (with its translation API in 2017)
Amazon (with Amazon Translate in 2016)