SpeechWorks was a company founded in the late 1990s in Boston that developed and supported speech-related computer software. The company was purchased in mid-2003 by Peabody, Massachusetts-based ScanSoft.

SpeechWorks' major products were speech recognition and synthesis systems, which were merged with ScanSoft's speech product line. The name SpeechWorks has been reincarnated as the brand name for all of ScanSoft's networked and embedded speech solutions.

SpeechWorks purchased Ithaca, New York-based Eloquent Technologies, Inc. in 2001.