Tesseract - Tesseract is an optical character recognition engine for various operating systems
Deepgram - Search engine for speech
Onlineocr.net - Free Online OCR service allows you to convert PDF document to MS Word file, scanned images to editable text formats and extract text from JPEG/TIFF/BMP files
Jasper - Jasper is an open source platform for developing always-on, voice-controlled applications.
ABBYY FineReader - ABBYY's latest PDF editor software, FineReader 16 you can easily convert files like PDF to Excel, PDF to Word, edit, share, collaborate & more with this PDF editor!
Sensory - Sensory provides accurate, low-cost embedded voice and biometric AI. Sensory’s technologies have shipped in over a billion units of consumer products.