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Data Quality

Nexdata has a comprehensive data quality management system to supervise the smooth implementation of the project, and ensure the results meet the customer's requirements.

Quality Management System

Quality Management Certification

Nexdata has obtained ISO9001 quality management certification and ensures data quality through three rounds of quality assurance. At Nexdata, ensuring data quality is our top priority. Our mission is to elevate customers' models with high-quality data.

Quality Management Certification

Multi-level Quality Inspections

Self-inspection Process

Self-inspection is carried out in the form of mutual inspection by multiple people. The data processed by each person is handled by persons other than the data processor to ensure the objectivity of the data quality inspection, and the self-inspection rate reaches 100%.

Final Quality Inspection

The initial inspection is carried out by Nexdata’s project team on the self-inspection qualified data submitted by the project implementation team.The initial inspection adopts the method of random inspection, the ratio of random inspection is at least 50%, and the ratio of initial inspection of data with high requirements is at least 70%.

Final quality control process

Nexdata's independent final inspection center conducts final inspection of the data that has passed the initial inspection, which is the most important link before the data is delivered to the customer, and the final check on the quality. The final inspection adopts the method of random inspection, the ratio of random inspection is 30%, and the ratio of random inspection of data with high requirements is at least 50%.

Data Security

Nexdata prioritizes data security with dedicated data protection specialist and extensive confidentiality experience in site safety implementation.

Data Security System

Information Security Management System Certification

Nexdata has a complete data security management system, such as data security officer system, data business security specification, data security system self-assessment system, data security accident emergency plan, information security confidentiality system, etc. and has obtained ISO27701 and ISO27001 certification.

Information Security Management System Certification

Personnel Security Management

Pre-employment security measures
Confidentiality measures during service
Post-employment confidentiality

Physical Security Assurance


We implement secure access controls via a license-based system and a human identification system to track and trace all entries and exits.

High-level confidential locations are monitored 24 hours a day.

All hardware devices have no external interfaces and can only log in to the labeling platform through the network.


Personnel undergo confidentiality training and sign confidentiality agreements.

All electronic devices (except mobile phones) must be stored in designated locations and cell phone cameras sealed.

Personal matters should be handled in designated areas outside the venue during working hours. During working hours, employees are generally not allowed to leave the office area except during lunch breaks.

Physical Security Assurance

Nexdata ensures data security from technical perspective, such as resource file URL encryption, anti-hotlink technology, anti-crawling technology, resource file security encryption, interference with illegal copying of voice files, data collection security, business logic security, identity authentication, access control, etc.

Technical Security Assurance

Why Nexdata

One-stop data service

Rich Off-the-shelf datasets, personalized data customization services, AI assisted data labeling tools, and one-stop solutions to AI data problems.

Data Quality Management System

We ensure High quality data through intelligent self-inspection, multiple rounds of quality inspection, and ISO9001 quality management certification.

Rich Annotation Tools

30 sets of mature annotation tools, fully covering voice, image video, 3D point cloud and text data annotation requirements.

Business Security and Compliance

It has passed ISO27001/ISO27701 information security and privacy protection certification, and complies with the Personal Information Protection Law and GDPR.

AI-assisted Pre-recognition

AI-assisted pre-identification enables human-computer interaction for semi-automatic labeling, increasing annotator efficiency by over 30%.

Sharpen Your AI with Better Data