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Human-in-the-loop data infrastructure

The ground truth layer for frontier AI.

Vendor+ pairs calibrated human expertise with purpose-built tooling to label, evaluate, and review the data your models learn from — at the accuracy regulated and frontier teams require.

Trusted by ML teams at
AppenData PlusLOFTKuoni Tumlare
sensor_frame · autonomous_driving.mp4
reviewer_queue: livethroughput: 2,110 labels/hr
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2M+
Labels delivered
98%
Median label accuracy
60+
Domain expert specialties
<24h
Pilot turnaround
Services

Every modality. One quality bar.

Data labeling

Image, video, text, audio, and 3D annotation with task-specific tooling and calibrated reviewers.

bounding_boxsegmentation3d_cuboid

RLHF & model evaluation

Human preference ranking, red-teaming, and structured evals to steer and benchmark your models.

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Data collection & sourcing

Purpose-built datasets gathered through vetted contributor networks and field capture programs.

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Domain expert review

Licensed clinicians, lawyers, and analysts annotate and adjudicate high-stakes, regulated data.

clinicallegalfinancial
How it runs

A pipeline built for iteration, not a one-off batch.

01
Scope

We map your taxonomy, edge cases, and quality bar before a single label is drawn.

02
Pilot

A small, fast batch validates guidelines and tooling against your ground truth.

03
Scale

Calibrated workforce pods ramp with automated QA and inter-annotator agreement checks.

04
Refine

Weekly accuracy reviews feed back into guidelines as your model's needs evolve.

"Vendor+'s reviewers caught labeling drift our own QA missed for weeks. Our eval accuracy moved more in one sprint than the previous quarter."

Head of ML Data · LOFT

Bring your hardest labeling problem.

Most pilots ship a scoped, quality-audited batch within a week — no long-term contract required to start.