# Amazon Transcribe vs Kaldi

| Attribute | Amazon Transcribe | Kaldi |
|---|---|---|
| **Vioscale score** | 65.3 (34% (low)) | 17.8 (15% (low)) |
| activity.commits_last_30d | - | 0 |
| adoption.dependent_repos | - | 1 |
| adoption.github_stars | - | 15,469 |
| deployment.options | `{"cloud":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | A fully managed API service that converts speech to text using advanced AI, supporting over 100 languages with features like speaker identification, custom vocabularies, and content filtering. | A free, open-source framework for building and deploying speech recognition systems, supporting multiple platforms from desktop to mobile and in-browser execution. |
| language.primary | - | Shell |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | - | `{"cli":true,"mac":true,"web":true,"linux":true,"android":true,"windows":true}` |
| pricing | `{"type":"usage","plans":[{"free":false,"name":"Streaming Transcription","summary":"$0.01/minute","features":["Real-time transcription","100+ language support","Custom vocabulary","Speaker diarization","Automatic punctuation","Word-level confidence scores"],"components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.01,"currency":"USD"}],"description":"Real-time audio transcription","contactSales":false},{"free":false,"name":"Batch Transcription","summary":"$0.006/minute","features":["Batch audio processing","Recorded file support","100+ language support","Custom vocabulary","Automatic language detection","Vocabulary filtering"],"components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.006,"currency":"USD"}],"description":"Recorded audio file transcription","contactSales":false},{"free":false,"name":"Call Analytics","summary":"$0.03/minute (Tier 1, up to 250k minutes)","features":["Sentiment analysis","Call categorization","Call characteristics tracking","Speaker identification","Compliance monitoring","Automatic summaries"],"components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.03,"currency":"USD"}],"description":"Advanced call transcription with conversation insights","contactSales":false}],"addOns":[{"name":"Automatic Content Redaction"},{"name":"Custom Language Models"},{"name":"Generative Call Summarization","components":[{"per":{"qty":1,"unit":"minute"},"kind":"metered","amount":0.0024,"currency":"USD"}]}],"summary":"From $0.006/minute for batch transcription. Free tier: 60 minutes/month for 12 months.","currency":"USD","freeTier":true,"sourceUrl":"https://aws.amazon.com/transcribe/pricing/?nc=sn&loc=3","retrievedAt":"2026-08-19T21:37:22.238Z","startingPrice":{"unit":"minute","amount":0.006,"currency":"USD"},"billingPeriods":["month"]}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://kaldi-asr.org/","retrievedAt":"2026-08-20T12:17:47.249Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | low | free |
| pricing.starting_price | `{"amount":0.006,"currency":"USD"}` | - |
| pricing.transparent | yes | - |
| security.gdpr | yes | - |
| security.hipaa | yes | - |
| security.scorecard | - | 3.9 |
| security.vulnerabilities | - | `{"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 | Amazon Transcribe | 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: Vioscale. Generated 2026-09-01T16:54:23.593Z. "-" = undocumented, not absent.*