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AssemblyAI vs Rev AI

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Free plan
Only Rev AI (AssemblyAI has paid plans only)
Public API
Both have one
Higher Trust score
AssemblyAI — 88 vs 82 for Rev AI
Best fit
AssemblyAI: Developers embedding transcription into call, meeting or media products · Rev AI: Developers adding transcription to a product through an API
Status
Both up at our last check — AssemblyAI Sep 6, 2026, Rev AI Oct 2, 2026

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

AssemblyAISpeech-to-text API priced by the hour of audioRev AISpeech-to-text API for recorded and live audio, with add-on language identification, summarization and human transcription.

Side by side

FactAssemblyAIRev AI
CategorySpeech-to-Text & TranscriptionSpeech-to-Text & Transcription
Pricing modelPaidFreemium
Starts at—$0.005/min
Public APIYesYes
Trust score88 / 10082 / 100
PlatformsAPIWeb, API
CompanyAssemblyAI, Inc.Rev
Launched2017—
Last verifiedSep 6, 2026Oct 2, 2026

What our research says

AssemblyAI

The transcription API to reach for when accuracy and per-hour pricing matter more than a user interface, but the headline rate is a base rate and every label you actually want adds to it.

Pros

  • $50 of credits at signup with no card required
  • Per-hour rates are published plainly and undercut most incumbents
  • Add-ons cover diarisation, redaction, summarisation and medical vocabulary
  • Voice Agent API is one flat $0.075/min covering model and speech too

Cons

  • No product surface at all — everything is code
  • Add-ons stack, so the real rate usually lands well above $0.15/hr
  • Streaming diarisation costs six times the async equivalent
  • No volume discounts published on the pricing page

Rev AI

A straightforward, per-minute speech recognition API from a company with a long record in human transcription, which gives it a clean path from machine drafts to verified transcripts. Developers who need accuracy claims backed by their own audio should run a test on their material, since the benchmark claims are the vendor's. Anyone wanting a consumer transcription app should know Rev's main site now targets legal and investigative teams.

Pros

  • Free starter credits and public per-minute prices
  • Async and streaming endpoints, plus forced alignment
  • 57+ languages and add-on insights such as topics and sentiment
  • Human transcription available from the same API

Cons

  • Accuracy and bias claims come from the vendor's own benchmarks
  • Several separate meters (transcription, insights, alignment) make costs harder to forecast
  • Human transcription costs far more per minute than machine transcription

Which one fits

Choose AssemblyAI if you need

  • Developers embedding transcription into call, meeting or media products
  • Teams needing speaker labels, redaction and summaries from one vendor
  • Voice-agent builders who want recognition, reasoning and speech on a single bill

Choose Rev AI if you need

  • Developers adding transcription to a product through an API
  • Media and accessibility teams that need captions plus an option for human review
  • Companies with data-control needs that want an on-premises deployment

AssemblyAI vs Rev AI: the questions people ask

Is AssemblyAI cheaper than Rev AI?

Rev AI starts at $0.005/min. An entry price for AssemblyAI is not confirmed by us yet, so check its pricing page before you compare.

Does AssemblyAI or Rev AI have a free tier?

Rev AI has a free tier; AssemblyAI has paid plans only.

Which has a public API, AssemblyAI or Rev AI?

Both ship a public API, so either can be built on; the fact table above shows the platforms each one runs on.

More comparisons

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