Expert Human Annotators
Trained annotators and domain specialists who follow detailed project guidelines and edge-case playbooks.
Data Processing & Annotation
Data Annotation Services
Annotation Services for LLM, NLP, Vision & Speech AI
Image & VideoAudio & TextLLM & NLP
Overview
Enterprise-grade annotation across image, video, audio and text — bounding boxes, segmentation, LiDAR, speaker labeling, NER and LLM instruction data.
Dhvani.ai provides enterprise-grade annotation services across Image, Video, Audio, and Text, purpose-built for training and evaluating Computer Vision, Speech AI, NLP, and Large Language Models (LLMs).
Our annotation pipelines combine expert human annotators, automation, and multi-stage QA to deliver high-accuracy, scalable, and compliant datasets.
Capabilities
How Our Annotation Pipeline Works
Automation-Assisted Labeling
Pre-labeling and tooling accelerate throughput while humans make every final judgement call.
Multi-Stage QA
Human-in-the-loop validation with multilayer QA, reviewer calibration and agreement scoring.
Scope
Annotation Capabilities
Image & Video Annotation
- 2D & 3D Bounding Boxes
- Polygon Annotation
- Semantic & Instance Segmentation
- Object Detection, Tracking & Scene Classification
- LiDAR & Point Cloud Annotation for autonomous and spatial AI systems
Audio Annotation
- Speaker Labeling & Diarization
- Speech segmentation & time alignment
- Emotion, intent, and acoustic labeling
- ASR-ready and conversational AI datasets
Text & NLP Annotation
- Named Entity Recognition (NER)
- Intent & sentiment labeling
- Text classification & span tagging
- Instruction tuning and prompt datasets for LLMs
Built for LLM & NLP Training
- Human-labeled, high-quality text annotations
- Structured datasets for LLM fine-tuning, evaluation, and alignment
- Multilingual coverage across 100+ languages
- Consistent tagging schemas and annotation guidelines
Use cases
Where it powers AI
Autonomous vehicles & roboticsRetail & e-commerce visionMedical imaging AISpeech & conversational AILLM fine-tuning & alignmentDocument & OCR AI
Quality & security
Built to be trusted
- Human-in-the-loop validation with multilayer QA
- Client tools and custom workflows supported
- Consistent tagging schemas and annotation guidelines
- Secure, scalable, and compliance-ready pipelines
Delivery formats
Client ToolJSONCSVXMLSRTCOCO / YOLO (on request)
“Dhvani.ai transforms raw data into AI-ready intelligence—accurate, scalable, and production-grade.”
How it works
From brief to AI-ready delivery
01Step
Requirement Analysis
We capture your use case, data specification, languages, volumes, timelines and compliance needs.
02Step
Solution Design & Pilot
We design the workflow, write guidelines and deliver a pilot batch for your sign-off.
03Step
Production
Dedicated teams scale delivery with daily progress tracking and a single point of contact.
04Step
Quality Assurance
Multi-layer QA, sampling and reporting against agreed metrics on every delivery.
05Step
Delivery & Support
Secure delivery in your format, plus revisions, iterations and long-term support.
Service FAQ
Data Annotation Services — FAQs
Quick answers to common questions about this service.
Still have questions?
Talk to our team directly — we usually reply within a few hours.
2D & 3D bounding boxes, polygons, semantic & instance segmentation, object tracking, LiDAR & point cloud, speaker diarization, emotion & intent labeling, NER, sentiment, classification and LLM instruction / prompt datasets.
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Start a Project
Ready to start your data annotation services project?
Share your languages, volumes and timelines — we’ll respond with a scoped plan within one business day.