Which of these linguistic technology companies was formed through a merger that deliberately combined the names of the original companies to reflect both their heritage and complementary language technologies?

In the world of language and linguistics, corporate mergers and acquisitions often lead to fascinating brand name evolutions. Some companies choose to completely rebrand, while others create hybrid names to preserve brand equity from both entities. This poll tests your knowledge of significant linguistic brand transformations that resulted from major mergers in the language learning and linguistic technology sectors.

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Rosetta Stone (formed from Rosetta Learning Systems and Milestone Technologies)
Duolingo (formed from Duo Systems and Lingology)
SpeechWorks (formed from Speech Systems and NetworkWorks)
Grammarly (formed from Grammar Solutions and Early Writing Technologies)