companies

AssemblyAI Inc.

San Francisco company providing speech-to-text and speech understanding APIs for developers and enterprises building voice AI products.

AssemblyAI was founded in 2017 by Dylan Fox, a former research engineer at Cisco. The company is headquartered in San Francisco, California. AssemblyAI builds speech AI models covering automatic speech-to-text transcription, real-time streaming transcription, and speech understanding features such as speaker detection, sentiment analysis, and PII redaction. Its API is used by enterprises and developers, with customers including The Wall Street Journal, NBC Universal, and Spotify, and serves over 200,000 developers. The company raised a $50 million Series C round led by Accel (with participation from Insight Partners and others) in December 2023, bringing total disclosed funding to roughly $115 million. The company is led by founder and CEO Dylan Fox.

Founded

2017

Headquarters

San Francisco, United States

Sector

infrastructure