AssemblyAI
AI / LLMPaidVisit Site
Developer-focused speech-to-text API with speaker diarization, sentiment analysis, and LLM-powered features.
Overview
AssemblyAI is the speech-to-text API most developers reach for when building transcription into products. Beyond raw transcription, its LeMUR layer applies LLMs to generate summaries, extract action items, answer questions, and do sentiment analysis on transcripts. Used inside products that need voice features: call center QA, meeting apps, voice agents, and content workflows.
Pros & Cons
Pros
- Developer-friendly API
- Accurate across many accents
- LLM layer on transcripts
- Good documentation
Cons
- Requires development skills
- No visual builder
- Costs scale with volume