Powering AI with
Precision Data
Annotation
Enterprise-grade annotation for NLP, computer vision, audio, and 3D data. Built by specialists in Hanoi. Delivered at the speed your AI pipeline demands.
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Leading Companies
Explore Best
Annotation Services
From raw text to LiDAR point clouds — we handle the full spectrum of data annotation with specialist teams and rigorous QA.
NLP & Text Annotation
Named entity recognition, sentiment labeling, intent detection, and text classification for LLMs and chatbots.
Image Annotation
Bounding boxes, segmentation masks, keypoints, and polygon annotation for computer vision model training.
Video Annotation
Frame-by-frame labeling, object tracking, and action recognition for autonomous systems and surveillance AI.
Audio Annotation
Speech transcription, speaker diarization, and sound classification for voice AI and conversational systems.
Why Choose DataX annotation?
We combine specialist annotators, rigorous QA, and transparent project management to deliver training data your models can trust.
Easy Integration
Receive annotated data in any format — JSON, CSV, COCO, YOLO, XML. Plug directly into your existing ML pipeline without friction.
Precision Quality
Multi-pass QA with inter-annotator agreement checks on every batch. We consistently deliver 98–99% accuracy across all annotation types.
Fast Turnaround
Most projects mobilize within 48 hours of brief sign-off. Flexible team scaling means we match your pace, not the other way around.
100% Secured
NDA-first, GDPR-compliant, with strict access controls, encrypted data handling, and audit trails that meet enterprise security standards.
From Brief to Training-Ready Data
A simple, transparent four-step process — with your project manager keeping you updated at every stage.
Submit Brief
Share your dataset, annotation requirements, guidelines, and timeline. We scope the project and confirm feasibility within 24 hours.
Team Assignment
We match your project with specialist annotators who have domain experience. A dedicated project manager oversees quality from day one.
Annotation & QA
Human annotators complete each batch, followed by automated quality checks and a second-pass review. Inter-annotator agreement is measured throughout.
Delivery
Clean, structured data delivered in your preferred format (JSON, CSV, XML, COCO, YOLO, etc.). Ready to plug directly into your training pipeline.
What AI teams say about working with us
DataX annotation turned around 50,000 annotated images in under two weeks with 98.7% accuracy on our validation set. Their QA process is genuinely rigorous — not just checkbox ticking.
We've tried three annotation vendors before DataX. The difference is the project management — one point of contact, daily updates, and zero surprises on delivery. Will use again.
Our LLM fine-tuning data needed nuanced intent labeling across five Southeast Asian language variants. DataX annotation handled it without any drop in quality. Rare capability.
We needed 200,000 bounding box annotations for our autonomous vehicle pipeline in three weeks. DataX delivered on time with a 99.1% pass rate on our internal review. Exceptional.
The team flagged ambiguous edge cases in our labeling guidelines before we even noticed them ourselves. That kind of proactive communication is what separates a real partner from a vendor.
We scaled from 10k to 500k labeled samples over six months without a single quality regression. DataX annotation's ramp-up process is clearly built for volume.
Audio transcription and speaker diarization at scale — DataX handled accented English, background noise, and overlapping speech with accuracy our in-house team couldn't match.
From briefing to first delivery was 36 hours. The turnaround speed without sacrificing quality is honestly the reason we keep coming back for every new model iteration.
DataX annotation built a custom annotation ontology for our medical imaging use case and trained their team on it in days. The domain sensitivity and attention to detail were impressive.
Unlock The Potential Of
AI With DataX annotation
Tell us about your dataset. We'll scope your project, match you with the right specialist team, and deliver training-ready data — fast.
Trusted by 60+ AI teams · Response within 24 hours · No-commitment scoping call