10+ Speech Information Assortment Providers in 2023


Speech information assortment companies are a cornerstone of contemporary AI improvement. Speech or voice information is especially crucial for pure language processing (NLP) and computerized speech recognition (ASR) methods. As AI continues to advance, the demand for high-quality speech datasets has surged, prompting many firms to hunt companies that may present various and multilingual audio information.

This text compares the highest speech information assortment companies and platforms to assist companies and AI builders with their speech information wants.

Speech information assortment companies comparability

Deciding on a service supplier for gathering speech information is a big resolution for any AI venture. The tables under supply the highest firms out there providing speech information assortment and era companies:

Desk 1. Comparability primarily based available on the market presence & expertise criterion

Platforms Person Scores
Out of 5 (Avg)*
Variety of
Based Information Assortment
Clickworker 4.1 68 2005
Appen 4.2 54 1996
Prolific 4.7 48 2014
Amazon Mechanical Turk 4 28 2005
Telus Worldwide 4.3 10 2005
TaskUs 4.3 6 2008
Summa Linguae Applied sciences N/A N/A 2011
LXT N/A N/A 2014
Toloka AI N/A N/A 2014
Innodata Inc N/A N/A 1988
DataForce by Transperfect N/A N/A 1992

* The info was gathered from B2B evaluation platforms reminiscent of G2, Trustradius, and Capterra.

** If the corporate mentions information assortment as the primary providing on its web site, we think about it to be information collection-focused.

*** Based mostly on vendor claims from the company web site.

Desk 2. Comparability primarily based on the platform capabilities criterion

Platforms Audio
Languages*** Cell software API availability ISO 27001 Certification Code of Conduct
Clickworker 30+
Appen 235+
Prolific N/A
Amazon Mechanical Turk N/A N/A N/A
Telus Worldwide 500+
TaskUs 65+
Summa Linguae Applied sciences 35+
LXT 1000+
Toloka AI 40+
Innodata Inc 40+
DataForce by Transperfect 250+


  • The comparability desk is created via publicly accessible and verifiable information.
  • The tables are ranked primarily based on the variety of opinions
  • The distributors had been chosen primarily based on the relevance of their companies. Which means all distributors that supplied speech or voice information assortment or era had been included.
  • Other than speech information, all firms cowl a wide selection of information sorts for his or her information assortment & annotation companies (picture, video, textual content, and many others.).
  • One other filter used to slim down the distributors was 50+ workers.
  • This desk is not going to be up to date repeatedly due to this fact, you possibly can take a look at our data-driven checklist of information assortment companies to search out the precise possibility to your speech information wants.
  • In desk 2, an organization is assumed to comply with a code of conduct if it has a code of conduct web page on its web site.

Standards for choosing a speech information assortment service

This part covers the factors you should utilize to slim down speech information assortment companies to suit your information wants.

Market presence & expertise

  1. Person scores: Excessive common scores on B2B platforms recommend robust buyer satisfaction.
  2. Variety of opinions: Extra opinions point out a broad person base and supply perception into buyer experiences.
  3. Based: Think about the corporate’s founding 12 months since older firms usually have extra refined companies attributable to their expertise. Nevertheless, this isn’t all the time the case, so mix this criterion with buyer opinions.
  4. Information assortment targeted: If the corporate gives information assortment and era as its major providing, it is going to have extra experience in it.

Platform capabilities

  1. Audio transcription: Having audio transcription as a facet service can facilitate the method of getting ready speech datasets.
  2. Audio annotation: Important for getting ready speech datasets which can be prepared for AI mannequin coaching.
  3. Languages: It’s essential to verify which languages are lined by the service supplier and if the language(s) you require is obtainable.
  4. Cell software: Facilitates on-the-go venture administration and distinctive voice information assortment eventualities.
  5. API integration: Permits environment friendly information switch and processing.
  6. ISO certification: Signifies adherence to world requirements for information safety and high quality.
  7. Code of conduct: Displays dedication to moral practices in direction of the workforce.
  8. Crowd dimension: A big, various world workforce enhances scalability and answer range. An even bigger crowd can supply speech datasets in additional languages and dialects:

Determine 1. Comparability of the group dimension of all the businesses in contrast on this article

A bard graph comparing the crowd size of all the speech data collection companies. Clickworker has the largest with over 4.5 million, followed by Appen and Telus international with over 1 million.


  • In Determine 1, Innodata Inc. and TaskUS weren’t included since their crowd dimension was lower than 100K.
  • For Determine 1, some distributors had been additionally not included since their crowd dimension information was not discovered.

Firm analysis

Right here’s a quick overview of the businesses listed earlier within the tables

1. Clickworker

Clickworker makes a speciality of AI information assortment and era via a crowdsourcing platform, masking a number of information sorts, together with speech, audio, picture, video, textual content, and many others.


  • Human-generated speech datasets in a number of languages
  • Picture and Video information assortment companies
  • Human-generated and picked up datasets
  • Information annotation companies
  • Audio transcription and translation companies

Clickworker’s execs and cons

  • Clients think about the corporate’s crowd dependable and the platform to be user-friendly.1
One of the speech data collection services Clickworker's positive review on reliability and ease-of-use from G2.
  • Clients discover its annotation companies helpful and efficient.2
Clickworker's positive review on image data annotation from G2 for the image data collection article.

2. Appen

Appen works with a crowdsourcing platform specializing in deep studying, picture information, and machine-learning fashions.


  • Picture and video datasets
  • Audio and textual content information assortment companies
  • Annotation companies for visible and audio information
  • Scalable options for various AI wants

Appen’s execs and cons:

  • Appen’s efficiency is declining, in response to information of it dropping purchasers and going via monetary losses.3
  • Clients additionally recognized server crashes on Appen’s platform.4
One of the speech data collection services, Appen's negative review from G2.

3. Prolific

Prolific additionally gives human-generated datasets via a crowdsourcing platform.


  • Information assortment
  • Picture annotation
  • Handwriting evaluation
  • Analysis information for academia

Prolific’s execs and cons:

  • One of many drawbacks recognized by analyzing the evaluation is that a lot of the opinions are concerning its research-related companies, which signifies that Prolific’s AI companies will not be that standard.5
  • Regardless that some analysis prospects discovered Prolific’s buyer assist to be good, that they had points with the platform’s lack of ability to set personalized quotas primarily based on geographic and demographic parameters.6
Prolific's positive and negative reviews for its speech data collection services from G2.

4. Innodata Inc

Specializing in creating AI coaching information, Innodata Inc. gives speech, picture, textual content, and audio information options to coach machine studying fashions.


  • Scalable audio assortment service
  • Machine studying venture consultancy
  • Information safety options

5. Telus Worldwide

Telus Worldwide gives AI options that span throughout machine studying, laptop imaginative and prescient, and pure language processing.


  • Scalable speech and audio datasets
  • Object recognition options
  • Different information companies for AI improvement

6. DataForce by Transperfect

DataForce caters to particular AI improvement wants, providing a mix of speech, picture, video, and audio information.


  • Audio and voice datasets
  • Picture and video information assortment companies
  • Skilled venture managers for AI wants

7. Amazon Mechanical Turk

Amazon Mechanical Turk, or MTurk, gives crowd-sourced information assortment and various information options starting from photos to textual content.


  • Massive-volume information assortment
  • Annotation companies for varied information sorts
  • Integration with the huge Amazon ecosystem

MTurk’s execs and cons:

  • Clients discovered its service fast, however the high quality of the information offered by the employees was low.7.
Negative review of Amazon mechanical turk regarding the low quality of its speech data collection services from G2.

8. Summa Linguae Applied sciences

With a deal with offering customized options, Summa Linguae gives instruments and companies that cater to distinctive AI venture necessities.


  • Customized and segmented information assortment
  • Machine studying mannequin coaching information
  • Information safety and high quality assurance

9. Toloka AI

Working with a crowdsourcing platform, Toloka AI makes a speciality of gathering information for AI fashions, particularly pure language processing (NLP).


  • Scalable speech and voice information options
  • Picture and video information assortment
  • Annotation companies for varied information sorts
  • Instruments for particular AI program wants

10. LXT

LXT is an rising participant within the information assortment area, specializing in curating datasets tailor-made for AI and machine studying fashions.


  • Speech and voice information assortment for NLP
  • Picture and video information assortment for machine studying fashions
  • Annotation companies with an emphasis on accuracy
  • Customized dataset creation for distinctive AI venture

11. TaskUS

TaskUS gives information sorts, together with speech, audio, picture, and video, for AI and machine studying fashions. Nevertheless, their key providing is within the buyer expertise area.


  • Speech datasets in a number of languages
  • Scalable picture and video information options
  • Annotation companies for varied information sorts
  • Instruments for particular AI program wants

Last suggestions

As synthetic intelligence, machine studying algorithms, and speech recognition methods change into extra integral to our every day lives, the demand for complete speech information assortment companies is simply anticipated to develop. 

These companies are important for creating audio datasets that prepare AI to know and course of human language successfully. By selecting a speech information assortment service that meets the factors outlined above, firms can guarantee they obtain high-quality information that’s ethically sourced and precisely annotated, laying a robust basis for the

Take note of these features whereas selecting your information associate:

  • Stage of range: It is very important work with a associate that provides massive and various and various workforce
  • Buyer satisfaction: You’ll be able to analyze opinions and buyer references and assess whether or not the client can meet deadlines. 
  • Clear description and understanding: Make clear edge circumstances so the workforce can work effectively with no need to pause and ask for clarification throughout edge circumstances that they may encounter.

Additional studying

When you need assistance discovering a vendor or have any questions, be at liberty to contact us:

Discover the Proper Distributors

Exterior Assets

  1. Clickworker buyer evaluation on reliability and easy-to-use platform. G2. Accessed: 20/October/2023.
  2. Clickworker’s evaluation concerning information annotation companies. G2. Accessed: 16/November/2023.
  3. Hayden Area, (2023). Contained in the turmoil at Appen, the previous AI darling that’s reeling from govt exits, huge losses. CNBC. Accessed: 06/September/2023.
  4. Appen’s destructive evaluation concerning server crashes. G2. Accessed: 16/Oct/2023.
  5. Most Prolific opinions are for its analysis companies. G2. Accessed: 17/November/2023.
  6. Prolific’s evaluation on buyer assist and customised parameters. G2. Accessed: 16/Oct.2023
  7. Negative evaluation concerning MTurk’s information assortment service. G2. Accessed: 20/September/2023.