AssemblyAI

At a Glance

AssemblyAI is an AI tool for Audio editing & restoration (category: Audio & Voice). Free access: One-off free allowance. Paid from 0.15 USD (Pre-recorded / Universal-2). Documented: 60 plans with prices and limits.

Category

Audio editing & restoration

Paid from

0.15 USD / per audio hour; prorated to seconds (Pre-recorded / Universal-2)

Free Option

One-off free allowance

Plans

60

Sources

11 verified sources

Website

assemblyai.com (opens in a new tab)

Category: Audio & Voice · Audio editing & restoration

Features

• File transcription, realtime streaming and Sync API for short clips
• Dictation API USD 0.62/audio hour including LLM rewrite
• Free starter credits, not an ongoing unlimited free API plan
• Free: 5 new streams/minute; PAYG starts at 100 and scales automatically
• Diarization, Medical Mode, summaries and PII redaction with separate rates
• LLM Gateway with model-specific token billing; SSO is a paid add-on

Prices and plans

Prices per vendor, excl. taxes/VAT where applicable.

Limits

Upload recordings only with the necessary rights and consent. AssemblyAI may use contract-permitted files for its own training after PII redaction, except on EU servers, under a BAA or with opt-out enabled. Current Data Controls are paid-account features offering opt-out, TTL and BAA at no additional charge; changes apply to new requests. Older support text still describes email opt-out and loss of discounts. Streaming zero retention requires training opt-out and does not remove billing metadata. Files, transcripts and Gateway outputs have different retention rules. Streaming scaling raises the next minute's limit by 10% at 70% or greater utilization; this does not promise arbitrary free-tier concurrency.

Alternatives and similar tools to AssemblyAI

A selection for “Audio editing & restoration” and curated direct comparisons. Direct comparisons carry the most weight, followed by the shared subcategory and shared tasks. Matching free-access types carry less weight. Ties are resolved consistently. No quality rating.

AmberscriptAutomatic transcription and subtitles with optional human editing.StarterLALAL.AISeparate vocals, instruments, and noise from audio or video.LiteCastmagicTurn audio and video into transcripts, notes, content and AI output for creator workflows.HobbyDescriptEdit, clean, caption, and redub audio or video through its transcript.HobbyistKrispTranscribe meetings, remove noise, and convert accents.CoreHappyScribeAI transcription and subtitling platform with a meeting notetaker, automatic speech recognition in 60+ languages, translation and optional human proofreading.BasicAudiostripAudioStrip separates vocals and instrumentals, processes noise and mastering, and provides key and BPM lookup.Premium PlanAsyncBrowser platform for audio and video recording, editing, AI generation, subtitles, voices and team production.Essentials / 450 / monthly

AssemblyAI alternatives comparison →

FAQ

How we compare

We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.

Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first; neither is a quality ranking. The vendor page always wins.

Edited and checked by the AI Compare Ninja team

Sources

All details regarding plans, limits, and features are based on official vendor documentation and the primary sources verified below.

• https://www.assemblyai.com/pricing
• https://www.assemblyai.com/docs/billing-and-pricing
• https://www.assemblyai.com/docs/getting-started/models
• https://www.assemblyai.com/docs/data-controls
• https://www.assemblyai.com/docs/data-retention-and-model-training
• https://support.assemblyai.com/articles/5930031898-how-to-opt-out-of-data-sharing-for-model-training
• https://www.assemblyai.com/docs/sso
• https://www.assemblyai.com/deployments/self-hosted
• https://www.assemblyai.com/products/dictation-api
• https://www.assemblyai.com/docs/dictation
• https://www.assemblyai.com/blog/dictation-api

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