audio-intelligence
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Mike Pappas Is Teaching AI to Hear the Argument Between the Words
The Modulate co-founder started with physics, voice changing and a gloriously awkward whiteboard encounter. Now his company listens for the meaning that vanishes when conversation becomes a transcript.
AssemblyAI
AssemblyAI is a San Francisco speech-AI company that builds and serves models turning audio and video into accurate text, plus higher-level 'audio intelligence' like summaries, sentiment, speaker labels, and PII redaction. Founded in 2017 by Dylan Fox, it sells a developer-first API used to add transcription, real-time streaming, and voice-agent capabilities to software. The company has raised more than $113M across seed to Series C and reports processing over a million hours of audio a day for customers ranging from startups to large enterprises.