Whisper AI
Open-source automatic speech recognition (ASR) system by OpenAI that transcribes and translates audio across 99 languages with high accuracy.
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✓ Free plan available
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Whisper is an open-source, general-purpose speech recognition model trained on 680,000 hours of multilingual and multitask supervised data. It supports transcription in 99 languages and translation to English, making it highly versatile for global use cases. Whisper is freely available via GitHub and can be self-hosted, though it requires technical setup and compute resources to run efficiently.
Best for: Developers, researchers, and technical users needing accurate multilingual speech-to-text transcription without licensing costs.
Key Features
- Speech-to-text transcription in 99 languages
- Audio-to-English translation
- Multiple model sizes (tiny, base, small, medium, large-v3)
- Timestamp generation at word and segment level
- Noise robustness for real-world audio
- Open-source and self-hostable
- Speaker diarization (via third-party extensions)
Pros
- Genuinely best-in-class open-source ASR accuracy, especially with large-v3 model
- Completely free to use with no API rate limits when self-hosted
- Strong multilingual support — one of the widest language coverages available
- Active open-source community with many wrappers and integrations (e.g., faster-whisper, WhisperX)
Cons
- No native speaker diarization — identifying who said what requires third-party tools
- Large models (large-v3) require significant GPU resources; slow on CPU-only machines
- No official managed API from OpenAI — using it via OpenAI API costs money and has rate limits
- Transcription speed is not real-time out of the box without optimization libraries
- Punctuation and formatting can be inconsistent, especially for non-English languages
Pricing Details
| Pricing type | Free |
| Starting at | Free |
| Free plan | ✅ Available |
Plan Breakdown
Open-Source (Self-Hosted)
$0/mo
OpenAI API (Whisper endpoint)
$0.006/min
See Current Pricing →
Pricing may change — always verify on the official site.
- Transcribing interviews, podcasts, and meeting recordings
- Building multilingual voice assistants and apps
- Subtitle and caption generation for video content
- Academic research in NLP and speech processing
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| Rating | ★★★★☆ 4.2 | ★★★★½ 4.3 | ★★★★☆ 4.2 | ★★★★☆ 4.2 |
| Trust Score | 83/100 | 83/100 | 79/100 | 79/100 |
| Pricing |
Open-Source (Self-Hosted)
$0/mo
OpenAI API (Whisper endpoint)
$0.006/min |
Free
$0/mo
Pay-as-you-go
Usage-based
Enterprise
Custom |
Free
$0/mo
Starter
$39/mo
Pro
$99/mo
Business
$249/mo |
Free Trial
$0 (limited minutes)
Pay As You Go
~$10/hr of audio
Standard
$22/mo
Premium
$44/mo |
| Data updated | 2 days ago | 2 days ago | 2 days ago | 2 days ago |
| Try → | Compare → | Compare → | Compare → |
About Trust Score
Trust Score = (Rating / 5 × 60) + (Popularity / 100 × 40). A score of 100 means the tool has a perfect rating and maximum market popularity. Scores are updated automatically by our AI agent.
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