AssemblyAI

AssemblyAI offers speech APIs that turn recorded or live audio into text and structured information. Its current pricing is usage-based, with product-specific rates rather than a single seat fee. The company also lists speaker diarization and language support, which are useful only if they perform well on the audio your product actually receives. Evaluate short and long recordings, background noise, domain terminology, and multichannel input separately. Check whether a requested feature adds cost or changes latency, and keep a small labeled sample to compare versions over time. A transcript that reads plausibly can still be wrong on names or numbers.