Designed For Global Scale And Accuracy
Speech-to-text API built for multilingual scale and consistently low WER across real-world audio.
#1 In Challenging Conditions
Rev AI delivers accuracy across noisy, far-field, and telephony audio. Independent benchmarks show up to 77.4% gains over competitors. Trained on 12+ years of real-world speech—not synthetic data—for consistent low WER.
57+ Languages, One API
Transcribe in 57+ languages with the accuracy you expect from English, without adding new vendors. Built-in language identification supports content at scale. HIPAA readiness and EU deployment options are available.
Two Modes For Every Workflow
Asynchronous API processes pre-recorded files in minutes. Streaming API delivers real-time captions with low latency. Same world-class accuracy, security standards, integration—choose the mode that fits your needs.
Everything You Need For Speech-to-Text At Scale
Built for developers who demand accuracy, security, and global reach.
Fast Asynchronous Processing
Transcribe hour-long files in under a minute with our batch processing API. No file length limits. Supports up to 8 speaker channels with accurate speaker separation. Perfect for recorded content, archives, and bulk processing workflows.
Real-Time Streaming
Low-latency live transcription for captions, broadcasts, and real-time applications. Global English model supports all major accents. WebSocket and RTMPS protocol support with advanced punctuation and capitalization.
Global Language Coverage
58+ languages supported including multilingual English/Spanish models. Features vary by language, but Rev offers: Async, Streaming, HIPAA compliance, EU deployment, Human Transcription, Language ID, On-Prem, Sentiment Analysis, Topic Extraction.
Advanced NLP Features
Fully punctuated, context-aware transcripts. Inverse text normalization for numbers and dates. Word-level timestamps for precise citation and navigation. Custom vocabulary support for domain-specific terminology and unique names.
Built To Scale
Handle individual files or process thousands of hours seamlessly. No artificial caps or throttling. Enterprise-grade infrastructure designed for high-volume production workloads with consistent performance.
Developer-First Design
Simple REST API with comprehensive documentation. Official SDKs for Python, Node.js, and more. Webhook callbacks for job completion. Flexible output formats: JSON with timestamps, plain text, SRT, VTT. Single API endpoint works across all languages.
Rev Serves Your Industry
Legal & Compliance
eDiscovery platforms, digital court reporting, call recording and analysis, investigative transcription.
Media & Entertainment
Video captioning and subtitles, content accessibility, post-production workflows, searchable media archives.
Enterprise & Contact Centers
Meeting transcription, call quality monitoring, customer insights, agent training, and coaching.
Education & Accessibility
Lecture captioning, course materials, research interviews, accessibility compliance.
Why Rev AI?
Since 2010, Rev has been collecting and transcribing data to train ASR models. Our commitment to research and implementation means superior accuracy across diverse use cases—from pristine studio recordings to challenging real-world audio.
