Trusted Data Service Provider

Image Annotation Service For AI & Machine Learning

Kotwel's experienced annotators are proficient in various annotation methods and types, allowing us to provide accurate image and video annotation services at a reasonable cost.

Experienced and well-trained annotators

Strict quality control process

Rapid turnaround time

Image Annotation Services at Kotwel

Image Annotation With Bounding Box Kotwel

2D Bounding Box

3D Bounding Box Cuboid Annotation Kotwel

3D Bounding Box Annotation

Image Classification Annotation Kotwel

Image Classification

Semantic Segmentation Annotation Kotwel

Semantic Segmentation

Polygon Annotation Kotwel

Polygon Annotation

Lines and splines annotation Kotwel

Lines and Splines Annotation

Aim To Innovate


Your Trusted Image Annotation Service Provider For Your AI Models

Find out how we can help accelerate your AI projects

Quality is our top priority

At Kotwel, we prioritize excellence and maintain a strict quality process to ensure that our services are of the highest quality at all levels.

Our image annotation services are powered by a highly skilled workforce and cutting-edge infrastructure, enabling us to efficiently handle large-scale projects within tight deadlines.

Quality Assurance

Dedicated and competent QC team

Full Support

Quick response and regular updates


Scalable workforce on demand

Competent Annotators

Kotwel's annotation team is highly skilled in working with various annotation methods and types.

Our annotators are willing to go the extra mile to deliver the highest possible quality annotations.

Image Annotation Service Kotwel
Huong Thai

Thai Huong

Data Annotator at Kotwel

Probably one of the best companies to work for. I feel that my voice is heard and my input is taken into consideration. The senior team is always approachable which is a huge plus as well.

Pham Long

Pham Long

Data Annotator at Kotwel

Never get late salary payments; they even pay me earlier than expected. My teammates are friendly, helpful, and really fun to work with. I feel so lucky to work for such a wonderful company!

Bach Hoang

Hoang Bach

Data Annotator at Kotwel

Transparent and conscientious company. Treats employees as assets. They truly care about their people.

Kotwel's Workflow

1. Project set-up

Our team will work with you to establish priorities and define deliverables, developing a custom solution based on your project objectives and timeline.

2. Production

We kick off the project and keep you regularly updated on the progress. Our dedicated manager will be in contact to answer all your questions and assist you until the project is completed.

3. Delivery

Our project management team checks, packages, and formats the deliverables before sending them to you for final approval.

4. Post-completion service

Our company aims to ensure your satisfaction with our delivery. We are willing to provide continued support even after the project is complete.

Our Clients Trust Us

Client Testimonials

How clients talk about their experience with Kotwel


Michael T.

Technology Firm

As a company providing technology solutions, we rely heavily on accurate and well-annotated data to power our AI algorithms. That's why we feel so lucky to have found Kotwel as our trusted partner for data annotation services. 

Emilia J

Emilia J.

Retail Firm

We have been using Kotwel's data annotation services to help us improve our product recommendations and optimize our inventory management. So far, so good!

Goh T

Goh T.

Robotics Firm

We’ve worked with Kotwel on three projects so far, and we are amazed by the precision and consistent quality they deliver. Their expertise and attention to detail in annotating diverse datasets have significantly enhanced the performance of our machine learning models. Another plus point is that the smooth collaboration with our internal team has made the annotation process efficient, stress-free, and enjoyable.

Tobias L

Tobias L.

Networking Firm

We couldn't be happier with the data annotation services provided by Kotwel. Thanks to their help, our NLP and computer vision algorithms are performing much better than ever before.

Image Annotation Case Study


Our client aimed to build video analysis models to study athlete performance and safeguard against injury by interpreting human body positions.

Our annotators completed 51,000 keypoints within 2 weeks.

Client's accuracy expectation: >90%. We delivered >98%.

Positive feedbacks from the client: Fast turnaround, accuracy beyond expectation and full support.

Drive your projects forward faster with less effort