Speech recorded to your script, languages, demographics and acoustic conditions by consented contributors in India and South Asia, transcribed and delivered with consent records.
Data service · Listing updated 11 Nov 2026
Bangladesh, India, Nepal, Sri Lanka
Projects from 50 to 10,000 hours
Startups, Mid-market, Enterprises
Contributors recruited for the project, each with a signed recording release
Mobile-app or studio recording to buyer specification, automated checks and linguist review
When an off-the-shelf corpus does not match your product, Kathana records exactly the speech you need.
Kathana recruits from its pool of more than 40,000 registered contributors across India and partner networks in Bangladesh, Nepal and Sri Lanka. Every contributor signs a recording release that names the permitted uses, and TTS voice actors sign separate agreements that cover synthetic voice creation. Recordings are made through Kathana's mobile app or in partner studios, checked automatically for clipping, silence and duplicates, then reviewed by linguists. As with all Kathana data, recordings may not be used for speaker identification or biometric purposes. Projects range from 50 to 10,000 hours.
11 fields as documented by Kathana Language Data.
| Field | Type | Description | Example |
|---|---|---|---|
| utterance_id | string | Identifier of the recorded segment | — |
| language | string | ISO 639-3 language code | — |
| prompt_id | string | Script line or task the speaker responded to | — |
| speaker_id | string | Pseudonymous speaker identifier | — |
| demographic_band | json | Gender, age band and dialect region quota cell | — |
| environment | string | Acoustic condition of the recording | — |
| device_type | string | Microphone or phone class | — |
| sample_rate_hz | integer | 16,000, 44,100 or 48,000 | — |
| audio_duration_sec | number | Segment length in seconds | — |
| transcript | string | Verbatim transcript | — |
| consent_record_id | string | Reference to the signed release | — |
Free sample available on request
The provider sends a sample file so you can test fit and quality before you buy.
Prices in USD, as published by Kathana Language Data
per collected and transcribed hour
studio TTS and wake-word projects
Converted amounts use DataStoa display rates and are approximate. Kathana Language Data quotes the final price, taxes and terms.
Request detailed pricing4 countries.
Time coverage: 2018 to present.
Provider-reported
Latency: Weekly partial deliveries during collection
DataStoa has not audited these figures. Ask the provider how they are measured, or test them on a sample.
The licence is agreed directly between you and Kathana Language Data. This summary is provider-reported; the linked terms prevail.
Not listed: internal analytics, AI retrieval and grounding, redistribution allowed, marketing and outreach. Ask Kathana Language Data if you need any of these.
Licensed Indic speech and text data for AI, from consented contributors
Kathana Language Data builds speech and text datasets for Indian languages with a network of more than 40,000 consented contributors and in-house linguists in Pune and Hyderabad. AI teams license its corpora and commission annotation, RLHF and custom collection projects for ASR, TTS and language models.
Also available on: AWS Data Exchange, Databricks Marketplace
What buyers say about Kathana Language Data. Reviews cover the provider, not only this listing.
from 2 reviews
The 2,000-item preference pilot came back on time with agreement metrics and annotator notes in Hindi and English. Guideline changes were absorbed within a day. We have since scaled to several thousand comparisons a week.
Meera J., Applied scientist, Enterprise AI lab
Every hour of audio links to a consent record that covers commercial model training, and the speaker metadata let us balance dialects properly. Transcription quality in Tamil and Bengali was the best we have bought.
Vikram R., Speech ML lead, Voice assistant company