Last updated: 2026-08-19
Rev AI is a speech-to-text API pairing Rev's Reverb model with optional human transcriptionists on one platform, covering 58+ languages with default speaker diarization for up to 8 speakers. It differs from single-mode competitors by routing hard audio to human review without a separate vendor.
About Rev AI
Rev AI is the developer API platform of Rev, an Austin-based transcription company founded in 2010 with $51.5M in Series B funding. The platform pairs its own Reverb speech-to-text model with an optional escalation path to professional human transcriptionists, giving teams one vendor for both automated speed and near-perfect accuracy. Reverb, the core AI model, is trained on over 3 million hours of human-transcribed audio and runs in both batch (asynchronous) and real-time (streaming) modes. Speaker diarization ships on by default for every asynchronous request, labeling up to 8 distinct speakers with no extra configuration. Advanced intelligence add-ons such as sentiment analysis and topic extraction are English-only for now. Rev AI suits English-language teams in media, legal technology, and compliance who need dependable batch transcription with the option to route difficult audio to human transcriptionists on the same platform, without switching vendors. Podcast producers, legal tech developers building deposition tools, and compliance teams needing HIPAA-eligible processing are the primary users. Rev released the Reverb model and its diarization weights as open-source in 2024, so teams with their own infrastructure can self-host for free and reduce vendor lock-in versus closed-source competitors like Deepgram and AssemblyAI.
Pricing
Free tier: 45 AI transcription minutes per month, English only. Essentials: $25.49/seat/month billed annually ($29.99 monthly), 5,000 AI minutes. Pro: $47.99/seat/month billed annually ($59.99 monthly), 10,000 AI minutes, 37+ languages. Enterprise: custom pricing with HIPAA-compliant processing and dedicated SLAs. Pay-as-you-go API access and add-on human transcription are also available at per-minute rates detailed in the cost FAQ below.
Key Features
- Reverb AI Model: Trained on 3 million+ hours of human-transcribed audio, Reverb runs in both batch and real-time streaming modes across dozens of languages.
- Default Speaker Diarization: Identifies and labels up to 8 speakers on every asynchronous request at 95% accuracy, with no added configuration or cost.
- Hybrid AI and Human Workflow: Routes difficult audio to Rev's professional transcriptionists for near-perfect accuracy via the same API, so teams never switch vendors for hard files.
- Audio Intelligence Add-ons: Sentiment analysis, topic extraction, and language identification ship as paid add-ons layered on base transcription, though currently limited to English audio.
- Open-Source Reverb Model: Reverb and its speaker-diarization weights were released open-source in 2024, letting teams self-host at no cost and cut reliance on a single vendor.
Pros
- Reverb's pay-as-you-go pricing undercuts Deepgram's Nova-3 rate of $0.0077 per minute for comparable English batch accuracy, without sacrificing quality.
- Speaker diarization ships by default at 95% accuracy, while Deepgram and AssemblyAI charge extra for the same capability.
- The hybrid AI-plus-human workflow lets teams escalate only the audio that needs it, without managing a second vendor relationship.
Cons
- Advanced intelligence features (sentiment, topic extraction, language ID) are English-only, so multilingual teams cannot use them yet.
- Automated accuracy drops to 70-75% on noisy or telephony recordings, requiring the human-transcription escalation for reliable results.
- SDKs cover Python, Node.js, and Java only: there is no official Go or .NET client.
Data Handling
- Training-data policy
- Does not use customer data to train external models. Data processing governed by Data Processing Addendum.
- Data retention
- 30 days
- Compliance
- SOC 2 Type II · HIPAA-eligible · GDPR · CCPA · CJIS
Frequently Asked Questions
What are Rev AI's pricing plans in 2026?
Pay-as-you-go API access costs $0.003 per minute for the Reverb model with no monthly minimum, and optional human transcription costs $1.99 per minute for 99%+ accuracy. Subscription seats run $25.49 per month for Essentials (or $29.99 billed monthly) up to $47.99 per month for Pro (or $59.99 billed monthly). Enterprise pricing is custom, with a dedicated SLA and HIPAA-eligible handling built in.
What do you get on Rev AI's free tier?
45 AI transcription minutes a month, English only, and no card at signup. Human transcription and the paid intelligence add-ons such as sentiment analysis are not included. Separately, the open-source Reverb model can be self-hosted on your own infrastructure at no cost at all.
What are Rev AI's closest competitors?
Deepgram wins on real-time voice agents that need latency under 300ms. AssemblyAI reaches further across multilingual audio intelligence, covering 99 languages. Google Cloud Speech-to-Text makes sense mainly for teams already standardised on GCP.
Is Rev AI better than Deepgram?
Deepgram's Nova-3 model charges $0.0077 per minute, well above Reverb's pay-as-you-go rate, for comparable English batch accuracy. Deepgram wins for sub-300ms real-time streaming that voice agents need, a mode Rev AI does not target. Rev AI instead bundles an optional human-transcription escalation path that Deepgram does not offer natively, making it the better fit for cost-sensitive batch jobs needing an accuracy safety net.
How long does it take to get going with Rev AI?
A first transcript comes back inside one sitting. Register at rev.ai, take an API key, and send an async request through the REST endpoint or the Python, Node.js, or Java SDK. Free-tier jobs run automatically with speaker diarization on by default, and real-time work moves to the streaming WebSocket endpoint instead.
Top Alternatives
- Deepgram: Sub-300ms streaming is what Deepgram is built for, and voice agents need it. Rev AI is the cheaper batch option, with a human escalation path when accuracy has to be certain.
- AssemblyAI: AssemblyAI covers 99 languages and the intelligence features layered on them. Rev AI competes on cost and on an open-source model you can run yourself.
HokAI guides covering Rev AI
- Best AI Voice Assistants in 2026: A Buyer's Guide to Synthesis, Transcription and Agents: AI voice assistants split into three buying decisions: synthesis, transcription and agent orchestration. Compare ElevenLabs, Deepgram and Retell AI for 2026.