AssemblyAI
AssemblyAI provides a robust API platform that allows you to integrate advanced speech-to-text, speaker identification, and audio intelligence features into your applications using state-of-the-art AI models.
Rev.ai
Rev.ai provides world-class speech-to-text APIs that enable you to integrate highly accurate automated transcription and captioning directly into your own applications and workflows.
Quick Comparison
| Feature | AssemblyAI | Rev.ai |
|---|---|---|
| Website | assemblyai.com | rev.ai |
| Pricing Model | Subscription | Subscription |
| Starting Price | Free | $99/month |
| FREE Trial | ✓ 0 days free trial | ✓ 0 days free trial |
| Free Plan | ✘ No free plan | ✘ No free plan |
| Product Demo | ✓ Request demo here | ✓ Request demo here |
| Deployment | ||
| Integrations | ||
| Target Users | ||
| Target Industries | ||
| Customer Count | 0 | 0 |
| Founded Year | 2017 | 2010 |
| Headquarters | San Francisco, USA | Austin, USA |
Overview
AssemblyAI
AssemblyAI gives you the tools to build powerful AI features into your products using simple APIs. You can transcribe audio and video files with high accuracy, identify different speakers in a recording, and extract actionable insights like sentiment, summaries, and key topics automatically. It handles the complex heavy lifting of machine learning so you can focus on building your core application.
Whether you are building a meeting assistant, a content moderation tool, or a media analysis platform, you can scale your processing from a few files to millions of hours of audio. The platform supports both asynchronous file processing and real-time streaming, making it a flexible choice for developers and enterprises across industries like telecommunications, healthcare, and media.
Rev.ai
Rev.ai gives you access to advanced speech-to-text technology through a developer-friendly API. You can convert audio and video files into text with high accuracy, whether you need real-time streaming transcription or asynchronous batch processing. It helps you unlock the value in your spoken content by providing searchable transcripts, automated captions, and deep insights into your media files.
The platform is built for developers and businesses that need to scale their transcription needs without sacrificing quality. You can use it to power accessibility features, analyze customer support calls, or generate metadata for large media libraries. With a simple pay-as-you-go model and extensive documentation, you can start transcribing your first files in minutes.
Overview
AssemblyAI Features
- Speech-to-Text Transcription Convert your audio and video files into accurate text transcripts with support for over 80 different languages.
- Real-Time Streaming Transcribe live audio streams with low latency so you can power captions and voice commands in real-time.
- Speaker Diarization Detect and label different speakers in a single audio file to follow conversations and interviews more effectively.
- Audio Intelligence Extract summaries, detect sentiment, and identify key chapters automatically to understand your content at a deeper level.
- PII Redaction Protect user privacy by automatically identifying and redacting sensitive personal information from your transcripts and audio files.
- Content Moderation Identify hate speech, violence, or sensitive topics in audio recordings to keep your platform safe and compliant.
Rev.ai Features
- Asynchronous Transcription. Submit your pre-recorded audio and video files to receive highly accurate text transcripts in a matter of minutes.
- Streaming Speech-to-Text. Transcribe live audio in real-time to power instant captions, live translations, or immediate conversational analysis for your users.
- Custom Vocabulary. Improve accuracy for your specific industry by adding unique terms, technical jargon, or proper names to the recognition engine.
- Topic Extraction. Automatically identify key themes and subjects within your transcripts to organize and categorize your content library efficiently.
- Sentiment Analysis. Detect the emotional tone of speakers to better understand customer satisfaction and agent performance in your recorded calls.
- Language Identification. Automatically detect the primary language spoken in your audio files to streamline your global content processing workflows.
Pricing Comparison
AssemblyAI Pricing
- $50 free credit to start
- Core Transcription: $0.37/hr
- Real-time Streaming: $0.47/hr
- Audio Intelligence: $0.15/hr
- No monthly commitment
- Access to all AI models
- Everything in Pay-as-you-go, plus:
- Volume-based discounts
- Dedicated support engineer
- Custom service level agreements
- Advanced security features
- Priority processing queues
Rev.ai Pricing
- $0.02 per minute for Async
- $0.022 per minute for Streaming
- Free first 5 hours of audio
- Access to all core APIs
- Standard support included
- Global language support
- Everything in Pay-as-you-go, plus:
- Volume-based discounts
- Dedicated account management
- Custom contract terms
- Priority technical support
- SLA guarantees
Pros & Cons
AssemblyAI
Pros
- Exceptional accuracy for complex audio and accents
- Extremely easy-to-use API with great documentation
- Fast processing speeds for large batches of files
- Responsive and helpful technical support team
Cons
- Costs can scale quickly for high-volume users
- Real-time latency varies based on internet connection
- Limited customization for specific niche industry vocabularies
Rev.ai
Pros
- Exceptional accuracy even with challenging background noise
- Comprehensive and well-organized developer documentation
- Fast processing times for large batch files
- Simple and transparent pay-as-you-go pricing model
Cons
- Limited built-in editing tools for end users
- Requires technical knowledge to implement via API
- Costs can scale quickly for high-volume users