# OTS Speech Datasets > IndecalAI holds around 35,000 hours of off-the-shelf (OTS) speech, prompts and conversations, already recorded and ready to license, with consent from every speaker for commercial AI training. Source: https://indecalai.com/datasets/ots/ Last updated: 2026-10-27 Publisher: IndecalAI (https://indecalai.com/) ## Key facts | | | |---|---| | Volume | Around 35,000 hours, already recorded | | Per language | Roughly 500 hours per language (Hindi: roughly 1,000 hours) | | Content | Speech, prompts and conversations | | Consent | Every speaker consented to commercial AI training | | Licence | Agreed with each customer, in writing | | Price | Quoted per order | | Samples | Sample clips sent in reply to a request | | Language pages | 71 languages, each with its own page (listed below) | | Contact | contact@indecalai.com, reply within one business day | Our OTS (off-the-shelf) speech datasets are around 35,000 hours of speech, prompts and conversations already recorded by people in our 30,000+ network, roughly 500 hours per language. Every speaker consented to commercial AI training, licence terms are agreed with each customer, and sample clips come back in reply to your request. Need a language or setting that isn't in stock? We collect speech to your brief too. ## What is an OTS speech dataset? An OTS, or off-the-shelf, speech dataset is speech that's already recorded and ready to license, instead of collected after you place an order. You pick the languages and hours you need from what's in stock, agree the licence, and the data is delivered. The point is time. A new collection has to find speakers, record them and check every file before anything ships. Speech that's already recorded skips that wait, which is why teams use it to train a first speech recognition model, widen a model to new languages, or build a test set fast. Our pool holds around 35,000 hours of speech, prompts and conversations, roughly 500 hours per language. People from our 30,000+ network recorded it, and every one of them consented to their voice being used for commercial AI training. Public corpora are free but often limit commercial use, and they cover what their creators chose to record. Before you build on one, read its licence. Our speech data specs guide covers what to check in any speech dataset. ### The speech pool at a glance - Volume: Around 35,000 hours, already recorded. - Per language: Roughly 500 hours per language in stock. - Content: Speech, prompts and conversations. - Speakers: People from our 30,000+ network. - Consent: Every speaker consented to commercial AI training. - Licence: Terms agreed with each customer, in writing. - Price: Quoted per order, by languages, hours and licence. - Samples: Sample clips sent in reply to your request. - Security: ISO 27001 certified. SOC 2 report available under NDA. GDPR DPAs and HIPAA BAAs on request. - Gaps: Anything not in stock, collected to your brief. ## Speech datasets by language Each language page lists what's in stock for that language, what to check in a sample and how to license it. Don't see yours? Ask what's in stock. - Albanian speech dataset: https://indecalai.com/datasets/ots/albanian-speech-dataset/ - Amharic speech dataset: https://indecalai.com/datasets/ots/amharic-speech-dataset/ - Arabic speech dataset: https://indecalai.com/datasets/ots/arabic-speech-dataset/ - Armenian speech dataset: https://indecalai.com/datasets/ots/armenian-speech-dataset/ - Assamese speech dataset: https://indecalai.com/datasets/ots/assamese-speech-dataset/ - Azerbaijani speech dataset: https://indecalai.com/datasets/ots/azerbaijani-speech-dataset/ - Bengali speech dataset: https://indecalai.com/datasets/ots/bengali-speech-dataset/ - Bulgarian speech dataset: https://indecalai.com/datasets/ots/bulgarian-speech-dataset/ - Burmese speech dataset: https://indecalai.com/datasets/ots/burmese-speech-dataset/ - Cantonese speech dataset: https://indecalai.com/datasets/ots/cantonese-speech-dataset/ - Catalan speech dataset: https://indecalai.com/datasets/ots/catalan-speech-dataset/ - Cebuano speech dataset: https://indecalai.com/datasets/ots/cebuano-speech-dataset/ - Croatian speech dataset: https://indecalai.com/datasets/ots/croatian-speech-dataset/ - Czech speech dataset: https://indecalai.com/datasets/ots/czech-speech-dataset/ - Danish speech dataset: https://indecalai.com/datasets/ots/danish-speech-dataset/ - Dutch speech dataset: https://indecalai.com/datasets/ots/dutch-speech-dataset/ - English speech dataset: https://indecalai.com/datasets/ots/english-speech-dataset/ - Filipino speech dataset: https://indecalai.com/datasets/ots/filipino-speech-dataset/ - Finnish speech dataset: https://indecalai.com/datasets/ots/finnish-speech-dataset/ - French speech dataset: https://indecalai.com/datasets/ots/french-speech-dataset/ - Georgian speech dataset: https://indecalai.com/datasets/ots/georgian-speech-dataset/ - German speech dataset: https://indecalai.com/datasets/ots/german-speech-dataset/ - Greek speech dataset: https://indecalai.com/datasets/ots/greek-speech-dataset/ - Gujarati speech dataset: https://indecalai.com/datasets/ots/gujarati-speech-dataset/ - Hausa speech dataset: https://indecalai.com/datasets/ots/hausa-speech-dataset/ - Hebrew speech dataset: https://indecalai.com/datasets/ots/hebrew-speech-dataset/ - Hindi speech dataset: https://indecalai.com/datasets/ots/hindi-speech-dataset/ - Hungarian speech dataset: https://indecalai.com/datasets/ots/hungarian-speech-dataset/ - Igbo speech dataset: https://indecalai.com/datasets/ots/igbo-speech-dataset/ - Indonesian speech dataset: https://indecalai.com/datasets/ots/indonesian-speech-dataset/ - Italian speech dataset: https://indecalai.com/datasets/ots/italian-speech-dataset/ - Japanese speech dataset: https://indecalai.com/datasets/ots/japanese-speech-dataset/ - Javanese speech dataset: https://indecalai.com/datasets/ots/javanese-speech-dataset/ - Kannada speech dataset: https://indecalai.com/datasets/ots/kannada-speech-dataset/ - Kazakh speech dataset: https://indecalai.com/datasets/ots/kazakh-speech-dataset/ - Khmer speech dataset: https://indecalai.com/datasets/ots/khmer-speech-dataset/ - Korean speech dataset: https://indecalai.com/datasets/ots/korean-speech-dataset/ - Lao speech dataset: https://indecalai.com/datasets/ots/lao-speech-dataset/ - Lithuanian speech dataset: https://indecalai.com/datasets/ots/lithuanian-speech-dataset/ - Malay speech dataset: https://indecalai.com/datasets/ots/malay-speech-dataset/ - Malayalam speech dataset: https://indecalai.com/datasets/ots/malayalam-speech-dataset/ - Mandarin Chinese speech dataset: https://indecalai.com/datasets/ots/mandarin-chinese-speech-dataset/ - Marathi speech dataset: https://indecalai.com/datasets/ots/marathi-speech-dataset/ - Nepali speech dataset: https://indecalai.com/datasets/ots/nepali-speech-dataset/ - Norwegian speech dataset: https://indecalai.com/datasets/ots/norwegian-speech-dataset/ - Odia speech dataset: https://indecalai.com/datasets/ots/odia-speech-dataset/ - Pashto speech dataset: https://indecalai.com/datasets/ots/pashto-speech-dataset/ - Persian speech dataset: https://indecalai.com/datasets/ots/persian-speech-dataset/ - Polish speech dataset: https://indecalai.com/datasets/ots/polish-speech-dataset/ - Portuguese speech dataset: https://indecalai.com/datasets/ots/portuguese-speech-dataset/ - Punjabi speech dataset: https://indecalai.com/datasets/ots/punjabi-speech-dataset/ - Romanian speech dataset: https://indecalai.com/datasets/ots/romanian-speech-dataset/ - Russian speech dataset: https://indecalai.com/datasets/ots/russian-speech-dataset/ - Serbian speech dataset: https://indecalai.com/datasets/ots/serbian-speech-dataset/ - Sinhala speech dataset: https://indecalai.com/datasets/ots/sinhala-speech-dataset/ - Slovak speech dataset: https://indecalai.com/datasets/ots/slovak-speech-dataset/ - Somali speech dataset: https://indecalai.com/datasets/ots/somali-speech-dataset/ - Spanish speech dataset: https://indecalai.com/datasets/ots/spanish-speech-dataset/ - Swahili speech dataset: https://indecalai.com/datasets/ots/swahili-speech-dataset/ - Swedish speech dataset: https://indecalai.com/datasets/ots/swedish-speech-dataset/ - Tamil speech dataset: https://indecalai.com/datasets/ots/tamil-speech-dataset/ - Telugu speech dataset: https://indecalai.com/datasets/ots/telugu-speech-dataset/ - Thai speech dataset: https://indecalai.com/datasets/ots/thai-speech-dataset/ - Turkish speech dataset: https://indecalai.com/datasets/ots/turkish-speech-dataset/ - Ukrainian speech dataset: https://indecalai.com/datasets/ots/ukrainian-speech-dataset/ - Urdu speech dataset: https://indecalai.com/datasets/ots/urdu-speech-dataset/ - Uzbek speech dataset: https://indecalai.com/datasets/ots/uzbek-speech-dataset/ - Vietnamese speech dataset: https://indecalai.com/datasets/ots/vietnamese-speech-dataset/ - Xhosa speech dataset: https://indecalai.com/datasets/ots/xhosa-speech-dataset/ - Yoruba speech dataset: https://indecalai.com/datasets/ots/yoruba-speech-dataset/ - Zulu speech dataset: https://indecalai.com/datasets/ots/zulu-speech-dataset/ ## What teams train on off-the-shelf speech data Common uses for speech that's already recorded. They show the kind of work, and they aren't client names. ### Speech recognition (ASR) A base of real speech to train or fine-tune a speech-to-text model in a new language, before spending on a custom collection. ### Voice bots and IVR Prompts and conversations that teach a voice bot how people in each language actually ask for things. ### Multilingual speech models Hours in several languages at once, to widen a speech or voice model past the languages it already handles. ### Test and evaluation sets Held-back recordings your model never trained on, to measure word error rate and compare models per language. ### Language identification Speech from many languages side by side, for models that work out which language someone is speaking. ### A head start on a custom project License what's in stock now, then commission only the accents, devices or wording that are missing. ## Off-the-shelf speech data or a custom collection? Both come from the same network, so you don't have to pick a vendor for each. Here's how they compare. - When it's ready | Off-the-shelf, from our pool: Already recorded, so delivery follows the licence | Custom collection: Recorded after the brief is agreed - Fit to your product | Off-the-shelf, from our pool: A broad base in each language | Custom collection: Your accents, devices, noise and wording - Volume | Off-the-shelf, from our pool: Roughly 500 hours per language in stock | Custom collection: As many hours as the brief needs - Checking it first | Off-the-shelf, from our pool: Sample clips sent in reply to your request | Custom collection: A small free sample recorded to your brief - Licence | Off-the-shelf, from our pool: Agreed with you before delivery | Custom collection: Agreed with you before delivery - Best for | Off-the-shelf, from our pool: A first model, new languages, test sets | Custom collection: Production accuracy in a specific setting ## What to ask any speech data vendor, and our answers Buying speech data goes wrong in the same few places. Ask every vendor these questions. Here's how we answer them. - Did every speaker consent to AI training? | Why it matters: Without it, you can't safely ship a model trained on the data. | Our answer: Yes. Every speaker consented to commercial AI training. - What does the licence let us do? | Why it matters: Some licences cover research or evaluation only, not a commercial product. | Our answer: Terms are agreed with you in writing, to fit what you're building. - Can anyone else license the same recordings? | Why it matters: It decides whether competitors can train on the same data. | Our answer: It's part of the licence we agree with you. Ask when you request terms. - Can we hear it first? | Why it matters: Audio quality and accents only show up when you listen. | Our answer: Yes. We send sample clips in reply to your request. - Is the quote in audio hours or speech hours? | Why it matters: Silence can make up a large share of an audio hour. | Our answer: We say which one the quote uses. - How is our data kept safe? | Why it matters: Your brief and any data you share are confidential. | Our answer: ISO 27001 certified. SOC 2 report under NDA. GDPR DPAs and HIPAA BAAs on request. - What happens if a language is missing? | Why it matters: A second vendor means a second contract and a second format. | Our answer: We collect it to your brief, from the same network. ## From a stock check to licensed speech data Your named contact runs it from the first question to delivery. - Ask: Tell us the languages, the hours and what the model is for. - Stock check: We reply with which languages are in stock and how many hours each has. - Sample clips: We send sample clips, so you can hear the audio before you commit. - Licence and quote: We agree the licence terms and send a quote for the order. - Delivery: The licensed speech is delivered to you. - Fill the gaps: Anything missing gets collected to your brief by our network. ## Off-the-shelf speech data terms The words that come up when you license speech data. The full glossary covers every data type. - OTS (off-the-shelf) dataset: Data already collected and ready to license before a buyer asks for it, instead of produced to one buyer's brief. - Custom collection: New data recorded to one buyer's brief, after they ask for it. - Scripted speech: People reading prompts written for them, also called read speech. It gives control over exactly which words get recorded. - Conversational speech: People talking naturally with each other, with the pauses, overlaps and corrections of real talk. - Audio hours and speech hours: Audio hours count the whole recording. Speech hours count only the parts where someone is talking. Check which one a quote uses. - Sample rate: How many times per second the audio is measured, such as 8 kHz for phone calls or 16 kHz for most speech recognition. - Exclusive licence: A licence where no one else can license the same recordings. A non-exclusive licence lets the seller license them to others too. - Speaker consent: A speaker's recorded agreement to how their voice can be used, which for training data should cover commercial AI training. ## Where off-the-shelf speech data leads next Most teams need one of these once the first model is trained. You can also compare all eight services. ### Custom speech data New speech recorded to your brief, in your setting. ### Transcription Speech turned into timed text, checked by people. ### Conversational AI data Dialogues and intents for voice bots and assistants. ### Language directory 100 languages, grouped by region. ### Data and model evaluation Held-back speech scored against your targets. ## Questions about OTS speech datasets Straight answers about licensing speech that's already recorded. The speech data FAQ covers custom collection. **What is an off-the-shelf speech dataset?** Speech that has already been recorded and is ready to license, instead of being collected after you place an order. You pick the languages and hours you need from what's in stock, agree the licence, and the data is delivered. **What does OTS mean?** OTS stands for off-the-shelf. An OTS dataset is data that's already collected and ready to license, so you pick what you need from stock instead of waiting for a new collection. **How much off-the-shelf speech data do you have?** Around 35,000 hours of speech, prompts and conversations, roughly 500 hours per language, recorded by people in our 30,000+ network. **Which languages are in stock?** 71 languages are in stock, roughly 500 hours each (Hindi roughly 1,000), and each one has its own page in the list on this page. If a language you need isn't there, we can collect it to your brief. **Did the speakers consent to AI training?** Yes. Every speaker in the pool gave consent for their recordings to be used for commercial AI training. **How is the data licensed?** Licence terms are agreed with each customer, in writing, before delivery. That includes how you can use the data and whether anyone else can license the same recordings, so the terms fit what you're building. **How much does it cost?** We quote each order on its own, based on the languages, the hours and the licence terms. Send what you need and your named contact comes back with a quote. **Can we hear samples before we buy?** Yes. Ask for the languages you need and we send sample clips in reply, so you can check the audio before you commit. **What if our language or domain isn't in the pool?** We collect it. People from our 30,000+ network record new speech to your brief, and many teams license what's in stock first and commission only the gaps. **Should we buy off-the-shelf speech data or commission a custom collection?** Off-the-shelf is faster because the speech is already recorded, and it works well for a first model or a broad base. A custom collection fits better when you need specific accents, devices, noise or wording. Many teams use both. **Do you work with US teams?** Yes. We take calls in US Eastern mornings, which is evening in India. We're ISO 27001 certified, our SOC 2 report is available under NDA, and we sign GDPR data processing agreements and HIPAA business associate agreements on request.