AssemblyAI

AssemblyAI pairs production ASR models with a speech-understanding layer for teams that need more than raw transcripts. Universal-3 Pro is positioned for higher-accuracy transcription and voice agents, Universal-2 keeps broad 99-language batch coverage, and add-ons cover summaries, sentiment, topic detection, redaction, and speaker features.

• Universal-3 Pro Streaming targets higher-quality voice-agent transcription.
• Universal-2 provides lower-cost 99-language pre-recorded transcription.
• Speech-understanding add-ons cover summaries, sentiment, labels, redaction, and formatting.
• Where it fits: A speech-to-text API (Universal-3 Pro, Universal-2, and streaming models) pairing transcription with speech intelligence such as summaries, sentiment, topic detection, and speaker labels.

• Text-to-speech and voice generation: AssemblyAI applies this capability to Speech to text, Speech intelligence workflows so users can move faster while keeping output quality reviewable.
• Voice cleanup and noise reduction: AssemblyAI applies this capability to Speech to text, Speech intelligence workflows so users can move faster while keeping output quality reviewable.
• Music and sound creation: AssemblyAI applies this capability to Speech to text, Speech intelligence workflows so users can move faster while keeping output quality reviewable.
• Transcription, dubbing, and translation: AssemblyAI applies this capability to Speech to text, Speech intelligence workflows so users can move faster while keeping output quality reviewable.
• Podcast and meeting audio workflows: AssemblyAI applies this capability to Speech to text, Speech intelligence workflows so users can move faster while keeping output quality reviewable.

• Open the official website and create a project or recording workspace. Keep a human review step in the workflow for facts, privacy, rights, and brand fit.
• Choose voice, music, enhancement, transcription, or meeting mode. Keep a human review step in the workflow for facts, privacy, rights, and brand fit.
• Upload audio or enter text, style, language, speaker, and quality requirements. Keep a human review step in the workflow for facts, privacy, rights, and brand fit.
• Preview results, adjust timing, voice, pronunciation, or cleanup strength. Keep a human review step in the workflow for facts, privacy, rights, and brand fit.
• Export audio, transcript, notes, or shareable links for publishing or collaboration. Keep a human review step in the workflow for facts, privacy, rights, and brand fit.

• AssemblyAI offers a free tier or trial, so you can evaluate it before upgrading.
• Paid plans for AssemblyAI start at about $0.15/hr, with higher tiers unlocking more usage, stronger models, and team features.
• Start free, then pay as you go. Pre-recorded STT: Universal-2 is $0.15/hr and Universal-3 Pro is $0.21/hr. Realtime STT: Universal-Streaming is $0.15/hr and Universal-3 Pro Streaming is $0.45/hr, billed by total session duration. Add-ons are priced separately.
• Pricing last checked 2026-06-22, source: https://www.assemblyai.com/pricing. Plans can change, so confirm on the official site.

• Voiceovers for ads, courses, and product videos. AssemblyAI can shorten preparation time, create first drafts, or help teams compare options faster.
• Podcast enhancement, transcription, and repurposing. AssemblyAI can shorten preparation time, create first drafts, or help teams compare options faster.
• Music demos, songs, and creative audio experiments. AssemblyAI can shorten preparation time, create first drafts, or help teams compare options faster.
• Meeting notes, call summaries, and searchable recordings. AssemblyAI can shorten preparation time, create first drafts, or help teams compare options faster.
• Dubbing, localization, and accessibility content. AssemblyAI can shorten preparation time, create first drafts, or help teams compare options faster.

• Podcasters and audio producers. If Speech to text, Speech intelligence tasks appear often in your work, AssemblyAI can become part of a repeatable productivity workflow.
• Video creators and educators. If Speech to text, Speech intelligence tasks appear often in your work, AssemblyAI can become part of a repeatable productivity workflow.
• Marketing and localization teams. If Speech to text, Speech intelligence tasks appear often in your work, AssemblyAI can become part of a repeatable productivity workflow.
• Meeting-heavy teams and customer operations. If Speech to text, Speech intelligence tasks appear often in your work, AssemblyAI can become part of a repeatable productivity workflow.
• Musicians and creative experimenters. If Speech to text, Speech intelligence tasks appear often in your work, AssemblyAI can become part of a repeatable productivity workflow.