High-Quality Data Annotation Services
Power your AI and machine learning models with precisely labeled, verified data. 100% quality assured. Pan-India operations. Rapid scaling.
Quality Assurance
Project Monitoring
Skilled Annotators
Data Points Processed
Data Annotation Services
Comprehensive annotation solutions for AI/ML projects
Image Annotation
Bounding boxes, segmentation, classification, and polygon annotation for computer vision models.
Text Annotation
Named entity recognition, sentiment analysis, text classification, and transcription services.
Video Annotation
Frame-by-frame annotation, object tracking, and action recognition for video AI models.
Audio Annotation
Speech transcription, speaker identification, and audio event labeling services.
3D Point Cloud
LiDAR annotation for autonomous vehicles and 3D object detection models.
Document Processing
Invoice extraction, form processing, and document classification services.
Our Process
Streamlined workflow for quality and speed
Requirements
Detailed analysis of your annotation needs and model requirements
Guidelines
Custom annotation guidelines tailored to your project specifications
Annotation
Skilled annotators label data according to approved guidelines
QA Review
Quality assurance and validation of all annotated data
Delivery
Formatted datasets ready for your ML model training
Industries We Support
Trusted by leading companies across sectors
Autonomous Vehicles
Healthcare & Medical Imaging
E-Commerce & Retail
Natural Language Processing
Computer Vision
Robotics & Automation
Document Intelligence
Quality Assurance Testing
Why Choose Alentro for Data Annotation
Quality Guarantee
100% accuracy verification with multi-level QA checks and human review.
Rapid Scaling
Scale from thousands to millions of data points without quality compromise.
Cost Efficient
Competitive pricing with flexible engagement models tailored to your budget.
Domain Expertise
Team with deep ML/AI knowledge ensures contextually accurate annotations.
Data Security
Enterprise-grade security protocols and ISO 27001 compliance for sensitive data.
24/7 Support
Round-the-clock project monitoring and support for seamless execution.
Frequently Asked Questions
We support image annotation (bounding boxes, polygons, semantic segmentation), text annotation (classification, NER, sentiment analysis), audio annotation (transcription, speaker diarization), video annotation (action recognition, tracking), 3D point cloud annotation, and document annotation (forms, invoices, receipts).
Our data annotation services maintain 99%+ accuracy rates through multiple quality assurance rounds including inter-annotator agreement checks, automated validation, and expert manual review. We can customize QA levels based on your project requirements.
We serve autonomous vehicles, computer vision, NLP, medical imaging, satellite imagery, e-commerce, retail, autonomous robots, industrial automation, healthcare AI, and many other AI/ML applications. Our annotators have industry-specific expertise.
Project timelines depend on volume and complexity. Small projects (10K-100K data points) typically take 2-4 weeks. Large-scale projects (1M+ points) are handled with parallel teams for faster delivery. Rush timelines are available with premium rates.
All data is handled securely with ISO 27001 compliance, NDA agreements, encrypted storage, role-based access control, and audit trails. We support on-premise annotation, air-gapped systems, and HIPAA/GDPR compliance as needed.
Flexible Pricing Models
We offer cost-per-unit, project-based, and dedicated team models. Get a custom quote based on your project volume and complexity.
Start Your Project Today
Let's discuss your data annotation needs and deliver high-quality results.