Deepgram - Search engine for speech
Jasper - Jasper is an open source platform for developing always-on, voice-controlled applications.
Pullstring - Powering computer conversation across all platforms.
Yack.net - Recorded and transcribed calls for team collaboration
ChatterOn for Messenger - Build Facebook chat-bots in under 5 minutes
Speechmatics - The most accurate and inclusive speech-to-text API ever released.