Find Expert Segmentation Annotators for Any Tool

You can hire mask annotators for polygon and brush-based labeling, QA reviewers for verification and consistency checks, annotation leads for calibration and guideline enforcement, and domain specialists for industry-specific projects. Post a job describing your needs and receive proposals from specialists with relevant experience.

Specialists can perform semantic segmentation, instance segmentation, and panoptic segmentation. This includes fine boundary annotation, occlusion handling, thin structure labeling, and multi-class mask creation. You define the mask type, class definitions, and quality requirements in your job post.

Annotators work inside your environment. You control access by inviting them to your labeling tool or internal platform. OpenTrain does not require access to your data or systems. Most teams use project-based permissions, and annotators can sign NDAs or complete security reviews before onboarding.

Typical deliverables include pixel masks, polygon annotations, and instance IDs in your preferred format (COCO JSON, PNG masks, Pascal VOC, or custom). You also receive QA review passes and consistency checks across your dataset. You define the deliverable format and quality standards in your job post.

You set your own rates and negotiate directly with specialists. Rates vary by task complexity, boundary precision requirements, and domain expertise. General annotators typically charge less than QA reviewers or annotation leads. OpenTrain charges a platform fee on top of what you pay specialists. Contact us for volume pricing on large projects.

Our managed service handles everything: team assembly, onboarding, guideline development, calibration sets, QA passes, and delivery of production-ready masks. We manage the annotators so you can focus on your models. Ideal for large-scale projects, tight deadlines, or teams without internal annotation ops. Contact us for a managed service quote.