# faster-whisper vs Kaldi

| Attribute | faster-whisper | Kaldi |
|---|---|---|
| **vioscaleAI score** | 51.5 (33% (low)) | 39.5 (17% (low)) |
| activity.commits_last_30d | 7 | 0 |
| adoption.dependent_repos | 35 | 1 |
| adoption.github_stars | 25,877 | 15,496 |
| content.faq | `[{"answer":"An open-source implementation of speech recognition that accelerates transcription using optimized machine learning inference, with support for multiple platforms and container deployment. It is indexed under Speech To Text.","source":"https://github.com/pricing","question":"What is faster-whisper?","confidence":0.6},{"answer":"faster-whisper is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://github.com/pricing","question":"Is faster-whisper free to use?","confidence":0.6},{"answer":"faster-whisper supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://github.com/pricing","question":"What platforms does faster-whisper support?","confidence":0.6},{"answer":"Yes. faster-whisper can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://github.com/pricing","question":"Can faster-whisper be self-hosted?","confidence":0.6},{"answer":"We have confirmed 8 integrations for faster-whisper, including OpenAI API, OpenAI SDK, OpenAI CLI, HomeAssistant, Konele, Docker, AzureML and FastAPI. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://github.com/pricing","question":"What does faster-whisper integrate with?","confidence":0.6},{"answer":"Yes. faster-whisper is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/SYSTRAN/faster-whisper","question":"Is faster-whisper open source?","confidence":0.95}]` | `[{"answer":"A free, open-source framework for building and deploying speech recognition systems, supporting multiple platforms from desktop to mobile and in-browser execution. It is indexed under Speech To Text.","source":"https://kaldi-asr.org/","question":"What is Kaldi?","confidence":0.6},{"answer":"Kaldi is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.","source":"https://kaldi-asr.org/","question":"Is Kaldi free to use?","confidence":0.6},{"answer":"Kaldi supports the web, Windows, macOS, Linux, Android and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://kaldi-asr.org/","question":"What platforms does Kaldi support?","confidence":0.6},{"answer":"Yes. Kaldi can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://kaldi-asr.org/","question":"Can Kaldi be self-hosted?","confidence":0.6}]` |
| deployment.options | `{"on_prem":true,"air_gapped":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A high-performance implementation of OpenAI's Whisper for converting speech to text, with features for word-level timing and offline processing. | A free, open-source framework for building and deploying speech recognition systems, supporting multiple platforms from desktop to mobile and in-browser execution. |
| features.capabilities | `{"fine_tuning":true,"open_source":true,"word_timestamps":true,"offline_on_device":true,"real_time_streaming":true,"speaker_diarization":true}` | - |
| integrations.count | 5 | - |
| integrations.list | `[{"name":"OpenAI API"},{"name":"OpenAI SDK"},{"name":"OpenAI CLI"},{"name":"HomeAssistant"},{"name":"Konele"},{"name":"Docker"},{"name":"AzureML"},{"name":"FastAPI"},{"name":"OpenAI SDKs/CLI","native":false},{"name":"pyannote.audio","native":false},{"name":"pyannote.ai","native":false},{"name":"OpenAI SDK/CLI","native":false},{"name":"Azure ML","native":false},{"name":"Transformers library","native":false},{"name":"OpenAI","native":true}]` | - |
| language.primary | Python | Shell |
| license.spdx | MIT | - |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"mac":true,"linux":true,"android":true,"windows":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-10-15T20:28:12.642Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://kaldi-asr.org/","retrievedAt":"2026-08-20T12:17:47.249Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 27 | - |
| release.history | `[{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.2.1","date":"2025-10-31T11:34:00Z","type":"stable","version":"v1.2.1"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.2.0","date":"2025-08-06T00:32:35Z","type":"stable","version":"v1.2.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.1.1","date":"2025-01-01T14:45:17Z","type":"stable","version":"v1.1.1"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.1.0","date":"2024-11-21T17:19:27Z","type":"stable","version":"v1.1.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.0.3","date":"2024-07-01T10:05:08Z","type":"stable","version":"v1.0.3"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.0.2","date":"2024-05-06T02:08:27Z","type":"stable","version":"v1.0.2"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.0.1","date":"2024-03-01T10:46:22Z","type":"stable","version":"v1.0.1"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v1.0.0","date":"2024-02-22T08:56:53Z","type":"stable","version":"v1.0.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.10.1","date":"2024-02-22T12:08:53Z","type":"stable","version":"v0.10.1"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.10.0","date":"2024-02-22T11:55:44Z","type":"stable","version":"v0.10.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.9.0","date":"2023-09-18T14:34:26Z","type":"stable","version":"v0.9.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.8.0","date":"2023-09-04T10:01:17Z","type":"stable","version":"v0.8.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.7.1","date":"2023-07-24T09:20:02Z","type":"stable","version":"v0.7.1"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.7.0","date":"2023-07-18T13:30:31Z","type":"stable","version":"v0.7.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.6.0","date":"2023-05-24T14:22:34Z","type":"stable","version":"v0.6.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.5.1","date":"2023-04-26T15:41:33Z","type":"stable","version":"v0.5.1"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.5.0","date":"2023-04-25T15:04:48Z","type":"stable","version":"v0.5.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.4.1","date":"2023-04-04T10:58:53Z","type":"stable","version":"v0.4.1"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.4.0","date":"2023-04-03T15:29:31Z","type":"stable","version":"v0.4.0"},{"url":"https://github.com/SYSTRAN/faster-whisper/releases/tag/v0.3.0","date":"2023-03-24T10:00:28Z","type":"stable","version":"v0.3.0"}]` | - |
| security.scorecard | - | 3.9 |
| security.trust_center | https://github.com/security | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=faster-whisper&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=conda&package_name=kaldi&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Speech To Text)

| Capability | faster-whisper | Kaldi |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Real time streaming | ✓ | - |
| Speaker diarization | ✓ | - |
| Custom vocabulary | - | - |
| Fine tuning | ✓ | - |
| Word timestamps | ✓ | - |
| Punctuation formatting | - | - |
| Pii redaction | - | - |
| Vertical model | - | - |
| Offline on device | ✓ | - |
| Open source | ✓ | - |

*Source: vioscaleAI. Generated 2026-10-17T01:55:18.647Z. "-" = undocumented, not absent.*