Power your AI with human expertise.

Recruit vetted participants to generate high-quality data your models need to learn, align, and scale.

  • Access skilled professionals in any industry
  • Source hard-to-find experts for evaluation and fine-tuning
  • Generate high-quality, large-scale training data with precision
AI training data delivered through the platform and API

Real experts in the loop,
end to end.

Every task is real human judgment synthesized end to end.

01

Recruit verified experts

Hand-pick from 4.3M+ verified people across 50+ attributes and 100+ languages.

Recruited
4.3M+ verified people
50+ targeting attributes
100+ languages
02

Humans rate, label & red-team

Preference data, safety probes, and edge cases - structured tasks across thousands of examples.

In the task
Preference data & safety probes
Edge cases covered
Thousands of structured tasks
03

Better data, better model

Auditable, structured datasets delivered straight into training.

Delivered
Auditable, structured datasets
Fed back into training
Ready minutes after the last task

A loop that compounds.

Real human judgment, on a loop.

Improve your models with feedback from real, verified participants.

Recruit, gather human judgment, train, and evaluate - then run it again.

The loop
Recruit verified participants
Collect human feedback
Train & align
Evaluate & benchmark
Every cycle improves the model
01 Recruit verified participants
02 Collect human feedback
03 Train & align
04 Evaluate & benchmark

Built for high-quality AI data.

Verified human expertise, quality controls, and the full pipeline - from evaluation to fine-tuning.

Verified human expertise
01

Verified human expertise

Domain experts and everyday users - identity-verified across 150+ countries and 100+ languages.

Domain expertsNative speakers4.3M+ verified
Quality controls built in
02

Quality controls built in

Attention checks, inter-rater agreement, and fraud prevention keep every dataset clean.

Identity verifiedPass
Agreement scored0.91
Fraud kept outClean
The full pipeline
03

The full pipeline

Evaluation, preference data, annotation, and fine-tuning - delivered into your stack via API.

EvaluationRLHFAnnotationAPI delivery

One panel for every data need.

Evaluation, alignment, and fine-tuning data - from the same verified human network.

Evaluation & red-teamHuman judgment
Jesse T.
AI evaluator · verified
Rate & rank model outputSCORED
Adversarial red-teamingSAFETY
Benchmark model to modelBENCH
Real human judgment - not synthetic scores
Preference & alignmentStructured
Daniel K.
Preference rater · RLHF
Pairwise preference dataRLHF
Instruction & demonstrationSFT
Iterated on a cadenceLOOP
Alignment data your pipeline can ingest directly
Fine-tune & annotateAny modality
Sammy L.
Domain expert · fintech
Text, image, audio & videoMULTI
100+ languages & culturesGLOBAL
Domain-expert annotationEXPERT
Training data across every modality and market

A global network of verified experts.

Wherever your model ships, recruit the real people who can judge it - by domain, language, and culture.

Verified participants 1M+ 100K–1M 20K–100K 5K–20K <5K No coverage

150+ countries

Recruit experts and everyday users wherever your model is used - real local judgment, not a US-only sample.

100+ languages

Multilingual and cross-cultural data from real native speakers - for models that work everywhere.

Verified & fraud-free

Identity-checked participants, sourced directly - never scraped, borrowed, or synthetic.

Respondent helps me easily find the exactly-right participants for my projects. It works for any type of research project with any kind of participant.
Read customer stories
RespondentRecording

Your first qualified participant in 15 minutes.
Start now.