Rainbow provides RLHF and preference data, SFT and expert demonstrations, human evaluation and red-teaming, and multilingual data to frontier AI labs — all of it produced by verified experts.
You don't — so we removed the question. Every capability below is delivered by professionals whose identity, employer, role, and seniority are verified at source, against systems of record.
The work is the same work frontier labs buy everywhere else. The difference is that we can tell you exactly who did it, and prove it.
Pairwise judgments and reward signal from verified professionals in-domain — people whose role and seniority we verified at source, doing the work they're qualified to grade. Rationales documented, quality audited, identity never in question.
Gold-standard task demonstrations authored by practitioners — diagnoses, briefs, repair procedures, financial analyses — with the reasoning models should absorb, from experts we can vouch for.
Model report cards graded by domain experts with verified credentials: side-by-sides, capability probes, and adversarial passes — with confidence intervals, not anecdotes.
Native speakers whose fluency is verified at source — not a self-ticked checkbox on a marketplace form.
Doctors, nurses, lawyers, insurance and financial-sector specialists, IT professionals, project managers — matched to tasks by verified role and seniority, not resume titles.
Electricians, mechanics, CNC operators, aviation technicians, energy and agriculture specialists, defense-sector engineers — the technical and blue-collar depth most vendors can't reach through a sign-up form.
The layer everything rests on: each expert's identity, employer, role, and seniority verified at source, against systems of record. Verification as infrastructure.
Every unit of data ships with its provenance: which verified expert did the work, under which verified role and seniority, with the QA trail behind it.
Dedicated, stable teams in Europe, Latin America, China, the Gulf, and Africa with program management attached — the same verified experts week over week, so quality compounds instead of resetting.