Data Annotation Services

Data annotation & labeling services for every modality.

Graveiens is a specialist data annotation and labeling company delivering precise image annotation, video, 3D/LiDAR, text and audio labels at pixel, frame and token level. Every dataset moves through a four-stage QA workflow measured against a gold standard, so your models train on training-ready data you can trust.

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98%
Post-QA accuracy
5+
Data modalities
25+
Languages
4-stage
QA workflow
What is data annotation

Turn raw data into training-ready datasets

Data annotation (also called data labeling) is the process of tagging images, video, audio, text and 3D point clouds so machine-learning models can learn from them. As one of the data labeling companies built on a deep bench of trained annotators and subject-matter experts, Graveiens delivers image annotation and computer-vision labels, NLP tags, speech data and sensor-fusion annotation to a documented accuracy bar. Whether you need a one-off pilot or an ongoing labeling program across millions of items, we scale the workforce, tooling and QA to fit your ontology.

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What we label

Data annotation and labeling services across the full stack

From bounding boxes and image annotation to 3D point clouds and nuanced NLP labels, our trained annotators and SMEs handle the modalities and edge cases that decide model quality.

Image Annotation

  • Bounding boxes & polygons
  • Semantic & instance segmentation
  • Key-points & landmarks
  • OCR & text extraction
  • Image classification
See computer vision

Video Annotation

  • Object tracking across frames
  • Action & event recognition
  • Lane & road detection
  • Pose estimation
  • Temporal segmentation

3D & LiDAR

  • 3D point-cloud labeling
  • Cuboid & bounding volumes
  • Point-cloud segmentation
  • Sensor-fusion annotation
  • Frame-by-frame tracking

Text & NLP

  • Named-entity recognition
  • Sentiment & intent
  • Classification & tagging
  • Summarization & Q&A pairs
  • Relationship & span labeling
See NLP annotation

Audio Annotation

  • Speech transcription
  • Speaker diarization & ID
  • Event & noise detection
  • Emotion & prosody labels
  • Accent & dialect tagging

Content Moderation

  • Text, image & video review
  • Policy-based classification
  • Safety & toxicity labeling
  • Escalation workflows
  • Human-in-the-loop QA
See moderation
A closer look

Depth where it counts

3D & LiDAR

Point-cloud and sensor-fusion labeling

Depth-accurate segmentation and object labels on 3D point clouds for autonomous driving, robotics and spatial AI — with cross-sensor consistency and QA at every frame. Our LiDAR data annotation and autonomous vehicle data annotation teams handle multi-sensor scenes end to end.

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Text & NLP

Nuanced language labels

Entities, sentiment, intent and relationships labeled by trained linguists and domain SMEs — the subtle judgments that separate a usable dataset from a noisy one. Ask about multilingual image annotation and NLP labeling across 25+ languages.

Explore NLP annotation
Graveiens labelsentitiesforsentimentandintent
Quality & scale

Enterprise-grade QA on every label

Quality is why teams choose Graveiens over generalist data labeling companies. Every batch runs through create, internal review, client review and rework, benchmarked against a gold-standard set, with SME reviewers on the labels that need real judgment. ISO 9001:2017 certified processes and a pay-on-approval model mean your annotation projects stay accurate, auditable and near zero-risk to trial.

See our process
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Why Graveiens

Why teams choose Graveiens for data annotation services

Compliance-first delivery and a pay-on-approval model that de-risks every engagement.

Four-stage QA

Create, internal review, client review and rework — measured against a gold-standard set.

SME reviewers

STEM, medical, legal and finance experts on the labels that need judgment.

Tooling to fit

We adapt annotation tooling and guidelines to your ontology, not the other way around.

Pay on approval

Invoiced only for approved deliverables — pilots are near zero-risk.

FAQ

Questions, answered

What data annotation and labeling services do you offer?
We provide end-to-end data annotation services across image, video, 3D/LiDAR, text/NLP and audio, plus content moderation and data validation. Projects are scoped to your ontology, tooling and accuracy criteria.
Do you provide image annotation for computer vision?
Yes. Image annotation is a core capability — bounding boxes, polygons, semantic and instance segmentation, key-points, OCR and classification — used widely for computer-vision and ADAS models.
What annotation accuracy can we expect?
Accuracy is set by your acceptance criteria and measured against a gold-standard set. Our four-stage QA workflow with rework loops is designed to meet or exceed the agreed threshold before delivery.
Can you work in our annotation tool?
Yes. We work in your tooling or adapt ours to your ontology and guidelines, and we support custom label schemas per project.
Do you handle 3D / LiDAR and sensor fusion?
Yes — point-cloud labeling, cuboids, segmentation and multi-sensor fusion are core capabilities, commonly used for ADAS and robotics programs.
How do we start?
Most teams begin with a small paid pilot batch. You review the output against your criteria and only approve what meets the bar.

Related services

Data collection services Content moderation companies Data validation Image annotation & computer vision

Get a labeled sample batch

Send us a sample task. You only pay for deliverables you approve.

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