Data Collection For AI & Machine Learning

At Kotwel, we provide several different data collection solutions and services to best suit your specific AI program needs. As a global leader in our field, our clients benefit from our capability to quickly deliver large volumes of high-quality AI Training Data across multiple data types, including image, video, speech, audio, and text.

Unique approach to collect custom data that meets specific requirements

Diversified data in real-life situations on collecting data in a natural setting

Full support to ensure high-quality data and client satisfaction

Our unique approach to collecting custom data to match

Any specification.

Any demographic.

Any scenario.

Top-Quality Voice Data Collection Service For AI/ML Training | Kotwel At Kotwel, we offer multilingual, diverse and fast voice data collection service for AI-powered speech recognition.

Speech Data Collection


Video Data Collection


Image Data Collection


Handwritten Data Collection

Our Data Collection Solutions

We are committed to total customer satisfaction through providing consistently high quality data & services to our worldwide customers.

Voice Data Collection

Voice data collection (also known as speech data collection or audio data collection) is an important part of AI/Machine Learning. Audio data collection is a great way to prepare your NLP model or any AI model for multilingual audiences.


At Kotwel, we help collect voice and audio data in 75+ languages to support your multilingual AI systems.

Image Data Collection Service

We collect the custom images you need to train your unique AI-powered product. Our experienced project managers will ensure that your project runs smoothly, no matter how small or large.


Kotwel's approach to collecting custom image data makes use of our experience with unique scenario setups and dynamic project management, as well as our base of annotation experts for gestural and facial tagging.

Video Data Collection Services

Whether you need short selfie videos with different accessories and lighting/environment, traffic videos or conversational videos to improve AI technology for video recognition, we're always available to fulfill your requests.


We provide video data collection services in 75+ countries. For some countries that we have local advantages such as Vietnam, Japan, Spain and The United States, we are capable of collecting a large volume of videos within a short time.

The Right Place Where You’ll Get High-Quality Data Collection Services For All Your Industry Needs.

Find out how we can help accelerate your business growth

Kotwel's Workflow

1. Project set-up

Our team will work with you to establish priorities and define deliverables. They'll work to develop a custom solution based on your project objectives and timeline.

2. Production

We vet and onboard collectors of your preferred demographics, set them the collection task, and collect the dataset you need for your models.

3. Delivery

Our project management team checks, packages and formats the data before being sent to you for final approval.

4. Post-completion customer service

Our company want to ensure your satisfaction with our delivery. We are willing to continue supporting you even after the project is completed.

Choose Kotwel, Choose

High-quality Data

At Kotwel, excellence is our top priority, and we are committed to providing our clients with high-quality data. To achieve this, our dedicated team follows a strict quality process that ensures there is no compromise with quality at any level.

Rapid Turnaround Time

Businesses need fast, high-quality and reliable data to accelerate their AI/ML models. That's why we offer scalable solutions with rapid turnaround time to meet our clients' needs and help them achieve their goals.

Comprehensive Data Security Measures

We understand the importance of data security and the need for unique, high-end data. Therefore, we take every precaution to ensure that our clients' data is protected by comprehensive data security measures.

Personalized Pricing

Our pricing plans are designed to be flexible, customizable, and transparent. We work closely with our clients to understand their budget and requirements and create pricing plans that are tailored to their specific needs.

Our Clients Trust Us

Client Testimonials

How clients talk about their experience with Kotwel


Anthony J.

Publishing Firm

Top in every way, responsiveness, customer relationship and best quality. I will definitely contact Kotwel again for upcoming projects.


Chris H.

Technology Firm

If I could describe Kotwel services in only three words, they would be: excellent, speedy & productive.

Ye-jun K.

Ye-jun K.

Healthcare Firm

Kotwel really adapted to our needs. They understood what we were looking for, and offered us unique and appropriate solutions.

Hoang T.

Hoang T.

Manpower Firm

Our company used Kotwel's data service and other services. They delivered high-quality results that were very satisfying. The project coordinator was very enthusiastic, helpful, and professional. Five stars for fantastic service.

Drive your projects forward faster with less effort