exhaustvalveTraining data your AI can trust. Built in Europe.
exhaustvalve provides high-accuracy data annotation, labeling and LLM training data services for machine learning teams. Your data is processed entirely within the European Union, under GDPR, by vetted in-house annotators — never anonymous crowds.
Why ML teams choose exhaustvalve
- ✓99%+ annotation accuracy with three-stage human review
- ✓EU data residency — your data never leaves the EEA
- ✓GDPR-compliant workflows with signed DPAs
- ✓Tool-agnostic: CVAT, Labelbox, Label Studio or your own platform
- ✓Flexible scaling, no long-term contracts
- ✓Free pilot project before you commit
End-to-end data annotation services
From computer vision to LLM alignment — every modality, annotated by trained specialists and verified through a multi-stage quality pipeline.
Image Annotation
Bounding boxes, polygons, keypoints, and semantic, instance & panoptic segmentation for object detection and classification models.
Learn more →Video Annotation
Frame-by-frame object tracking, action recognition and event tagging with temporal consistency checks across sequences.
Learn more →3D & LiDAR Point Cloud
3D cuboids, point cloud segmentation and multi-sensor fusion labeling for autonomous driving, ADAS and robotics perception.
Learn more →Text & NLP Annotation
Named entity recognition, classification, sentiment analysis and intent labeling — in 40+ European and global languages.
Learn more →LLM & Generative AI Data
RLHF, supervised fine-tuning datasets, preference ranking, prompt–response evaluation and red-teaming by domain experts.
Learn more →Audio & Speech
Transcription, speaker diarization, sound event detection and language identification with native-speaker linguists.
Learn more →From pilot to production in five steps
A transparent workflow that lets you validate quality risk-free before scaling up.
Free pilot
Send a data sample and guidelines. We annotate it free of charge within days.
Quality review
You evaluate the pilot against your acceptance criteria and edge cases.
Tailored proposal
Transparent pricing per labeled object or per annotation hour — your choice.
Production labeling
A dedicated team annotates at scale with three-stage review and gold-set checks.
Delivery & iteration
On-time delivery in your format, with feedback loops to refine guidelines.
Quality you can audit, not just trust
Label quality is the biggest limiting factor on model performance. That's why every dataset we deliver passes through traceable quality gates — never a single pair of eyes.
- ✓Three-stage human review.
Annotation, peer cross-check, and senior QA sign-off on every batch.
- ✓Gold sets & inter-annotator agreement.
Continuous benchmarking against gold-standard references with measurable agreement scores.
- ✓Edge-case escalation.
Ambiguous items are flagged, documented and resolved with your team — improving guidelines as we go.
- ✓Domain expert validation.
Medical, legal, financial and linguistic specialists validate domain-sensitive datasets.
Tool-agnostic by principle
We work in your annotation environment or ours — CVAT, Labelbox, Label Studio, Datasaur, or your proprietary in-house platform. Your data formats, your export schemas, your MLOps pipeline.
Trusted across data-intensive industries
Specialized annotation teams with domain training for regulated and high-stakes sectors.
Autonomous Mobility
ADAS & AV perception: LiDAR, sensor fusion, lane and object tracking.
Healthcare & MedTech
DICOM imaging, clinical text and medical-expert-validated datasets.
E-Commerce & Retail
Product tagging, catalog enrichment, visual search and recommendations.
Finance & Insurance
Document extraction, claims processing and fraud-detection datasets.
Put your training data on European soil
Start with a free, no-obligation pilot. Send us a sample of your data and labeling guidelines — we'll return annotated results and a transparent quote within days.
Request your free pilot