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Kathana Language Data

Demo listing

Licensed Indic speech and text data for AI, from consented contributors

4.6(2)
Languages
22 Indic + English
Audio hours
38,000
Contributors
40,000+

Data from Kathana Language Data

4 published listings.

Kathana Language DataVerified provider🇮🇳

Indic conversational speech corpus (22 languages, transcribed)

38,000 hours of transcribed two-speaker conversations in 22 Indian languages from consented contributors, with dialect, age band, environment and device metadata.

Speech and audio data Free sample4.6(2)Demo listing
Coverage
1 country
History
Since 2018
Refresh
Monthly
Delivery
Amazon S3 +3
from $38.00 per transcribed audio hour, minimum 100 hours
10% off via DataStoa
Published 2026-09-07
Kathana Language DataVerified provider🇮🇳

Custom speech data collection to specification

Speech recorded to your script, languages, demographics and acoustic conditions by consented contributors in India and South Asia, transcribed and delivered with consent records.

Speech and audio dataData service Free sample4.6(2)Demo listing
Coverage
4 countries
History
Since 2018
Refresh
On request
Delivery
Amazon S3 +3
from $65.00 per collected and transcribed hour
Published 2026-09-04
Kathana Language DataVerified provider🇮🇳

RLHF preference labeling and human annotation in Indian languages

Native-speaker annotators for RLHF preference ranking, response rating, classification and entity tagging in 22 Indian languages, with gold checks and agreement reports.

Annotated and labeled dataData service Free sample4.6(2)Demo listing
Coverage
1 country
History
Since 2017
Refresh
On request
Delivery
Amazon S3 +3
from $0.06 per classification label
Published 2026-09-05
Kathana Language DataVerified provider🇮🇳

Indic and English text corpus for LLM pre-training and fine-tuning

62 billion deduplicated tokens of licensed text in 22 Indian languages and Indian English, with source, licence, domain and quality tags on every document.

LLM training data Free sample4.6(2)Demo listing
Coverage
1 country
History
Since 2008
Refresh
Quarterly
Delivery
Amazon S3 +2
from $90.00 per million tokens, minimum 500 million
Published 2026-09-06

About Kathana Language Data

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.

Data sources and methods

Where the data comes from
Recordings from contracted contributors with signed recording releases; text licensed from publishers, government open-data portals and public-domain collections digitised in-house.
How it is collected
Mobile-app and studio recording with scripted and conversational prompts, two-pass human transcription, automated PII scrubbing and deduplication for text, and chain-of-title records for every source.
What sets it apart
All 22 scheduled Indian languages with dialect and region metadata, a consent record for every speaker, and per-document licence tags on every text corpus.

Use cases

What the provider licenses its data for, and what it does not allow.

Intended uses

Training and evaluating speech recognition, speech synthesis and language models; voice assistants and contact-centre analytics.

Not allowed

Speaker identification or verification, cloning the voice of an individual contributor, biometric profiling, and any attempt to re-identify contributors.

DataStoa's acceptable use policy applies on top: no re-identification, discrimination, surveillance or sanctioned uses.

Compliance and security

Provider-reported. Ask for certificates or a data processing agreement before you sign.

Certifications

  • ISO 27001
  • SOC 2

Privacy laws they comply with

  • India DPDP
  • GDPR

Integrations

Other places you can receive this provider's data, useful if your team already buys through a cloud marketplace.

  • AWS Data Exchange
  • Databricks Marketplace

Reviews

Buyers rate four things: data quality, volume and coverage, value for money and service.

4.6
4.6

from 2 reviews

Data quality
5.0
Volume and coverage
4.5
Value for money
4.0
Customer service
5.0
  • 4.5 Verified purchaseDemo listing11 Nov 2026

    RLHF pilot turned into a long-term contract

    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.

    Data quality
    5/5
    Volume and coverage
    4/5
    Value for money
    4/5
    Customer service
    5/5

    Meera J., Applied scientist, Enterprise AI lab

  • 4.8 Verified purchaseDemo listing11 Nov 2026

    Speaker consent documentation passed our legal review

    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.

    Data quality
    5/5
    Volume and coverage
    5/5
    Value for money
    4/5
    Customer service
    5/5

    Vikram R., Speech ML lead, Voice assistant company