Southeast Asia · Thailand
Thai conversational speech dataset
2,000 hours of spontaneous Thai conversations recorded in Thailand across 200 vetted native speakers. Dual-channel audio with time-aligned transcripts, speaker metadata (age, gender, region, device), and full chain-of-consent documentation. Licensed for commercial ASR, TTS, and voice AI training.
Dataset specifications
| Language | Thai |
|---|---|
| Recorded in | Thailand |
| Speech type | Spontaneous two-person conversations |
| Volume | 2,000 hours |
| Speakers | 200 vetted native speakers |
| Audio | Dual-channel (one channel per speaker) |
| Transcripts | Time-aligned, human-verified |
| Metadata | Age, gender, region, recording device |
| License | Commercial (training & evaluation) |
| Price | $75 per hour of audio |
Need more hours, another dialect or your own recording setup? We collect speech data to spec.
Built for
Training and evaluating speech models that must handle real Thai speech:
- Automatic speech recognition (ASR / STT)
- Text-to-speech & voice synthesis prosody
- Voice agents and IVR for Thailand
- Speaker diarization & turn-taking models
- Speech LLM / audio-understanding fine-tuning
Why conversational data?
Models trained on read speech consistently underperform on spontaneous audio. Disfluencies, overlap, and natural speech rates aren’t in the training distribution. This dataset closes that gap for Thai. Read more in our guide to conversational vs. scripted speech data.
Free samples
Audit the Thai data yourself
Share your company email and we’ll email you representative audio, matching transcripts, and the metadata schema. Check audio quality, transcript accuracy, and speaker diversity before you spend a dollar.
Public alternatives
Public Thai speech data vs. this dataset
| Source | What it is | License | Commercial training |
|---|---|---|---|
| GigaSpeech 2 (Thai) (opens in a new tab)SpeechColab | Large multi-domain ASR corpus for Thai, Indonesian and Vietnamese with automatically produced transcripts. | Apache-2.0 tag on the card, but gated terms restrict use to non-commercial research and education | Not allowed |
| Common Voice Scripted Speech (Thai) (opens in a new tab)Mozilla Common Voice (Mozilla Data Collective) | Read speech recordings in Thai from Mozilla's Common Voice project. | CC0 1.0 | Allowed |
| Common Voice Spontaneous Speech (Thai) (opens in a new tab)Mozilla Common Voice (Mozilla Data Collective) | Spontaneous spoken responses to questions in Thai. | CC0 1.0 | Allowed |
| FLEURS (Thai) (opens in a new tab)Google | Read sentences from the FLoRes translation benchmark, recorded in 102 languages. | CC BY 4.0 | Allowed |
These Thai sources are read speech, spontaneous answers to questions, or GigaSpeech 2's auto-transcribed audio for non-commercial use; this dataset is two-person conversation recorded in Thailand with human-verified transcripts.
Licenses as published by each source, checked October 2026. Check the current terms before use.
FAQ
Frequently asked questions
What does the Thai speech dataset include?
2,000 hours of spontaneous two-person conversations from 200 vetted native speakers recorded in Thailand, delivered as dual-channel audio with time-aligned transcripts, speaker metadata (age, gender, region, device), and consent documentation.
What makes Thai hard for speech recognition?
Thai has five tones that change meaning, long and short vowels, and a script that writes words without spaces. That makes recognition and scoring tricky, since even counting word errors needs a word segmentation step first.
Is there free Thai speech data?
Yes, Common Voice Scripted Speech, Common Voice Spontaneous Speech and FLEURS are free for commercial use. GigaSpeech 2 is non-commercial only. This dataset is spontaneous two-person conversation recorded in Thailand, with speaker metadata, one channel per speaker and signed commercial-use consent.
Can I use this Thai dataset commercially?
Yes. The dataset is licensed for commercial use, including training ASR, TTS, and other voice-AI models. Every speaker has signed explicit commercial-use consent, and we provide the full consent chain for your legal review.
How much does the Thai speech dataset cost?
Pricing is $75 per hour of audio. Volume discounts are available for full-dataset and multi-language purchases. Contact us for a quote.
Can I evaluate samples before buying?
Yes. Request samples with your company email, and we'll email you representative audio files and matching transcripts so your team can audit quality before committing.
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