Rev AI
Free tierThe world's most accurate speech-to-text API for developers, built for speed and global scale.
Free tier available·Technical·Powered by Rev AI (proprietary models trained on 7M+ hours of human-verified speech data)·API available
Key strengths
Industry-leading accuracy (lowest Word Error Rate)Least biased WER across ethnic background, nationality, gender, and accent57+ language supportDeveloper-friendly API with SDKsCloud and on-premises deploymentEnterprise-grade security (SOC II, HIPAA, GDPR, PCI compliant, 99.99% uptime)AI Insights (sentiment analysis, topic extraction, summarization, translation, language identification)Trained on 7M+ hours of human-verified speech data
Free tier + paid plans
San Francisco, USA
Founded 2010
Self-hostable
Facts verified against rev.ai on
Recent changes
- Plans updated: Pay-as-you-go with free credits (5 hours of Reverb ASR). Reverb Transcription: $0.20/hr (English); Reverb Foreign Language: $0.30/hr (57+ languages); Whisper Large: $0.005/min; Human Transcription: $1.99/min; Forced Alignment: $0.003/min; Language ID: $0.003/min; Translation: $0.002–$0.025/min; Sentiment Analysis: $0.0008/10 words; Summarization: $0.002–$0.025/min; Topic Extraction: $0.0008/10 words. Enterprise: volume-based pricing.
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Rev AI provides a REST API with usage-based pricing and a free tier (5 hours of free Reverb ASR credits). Key endpoints and pricing tiers include:
- Reverb Transcription (English): $0.20/hr
- Reverb Foreign Language (57+ languages): $0.30/hr
- Whisper Large: $0.005/min
- Human Transcription: $1.99/min
- Forced Alignment: $0.003/min
- Language Identification: $0.003/min
- Translation: $0.002–$0.025/min
- Sentiment Analysis: $0.0008/10 words
- Summarization: $0.002–$0.025/min
- Topic Extraction: $0.0008/10 words
Deployment options include cloud-hosted and on-premises (self-hostable) configurations. Enterprise customers can access volume-based pricing. SDKs are available to simplify API integration. The platform meets SOC II, HIPAA, GDPR, and PCI compliance standards, with a 99.99% uptime guarantee.
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