Alternatives to Prolific

Human-recorded datasets for training computer-use AI agents

Real-world egocentric video and robot data for embodied AI training.

Verifier-grounded training data for frontier AI models, built on formal proofs, simulators, and oracles.

Curated video datasets and evals for training spatial reasoning in multimodal AI.

Custom, ethically sourced video datasets and real-time human feedback for AI video model training and evaluation.

Open-source data annotation platform for vision AI teams

Expert-curated reasoning data that trains frontier models to think like specialists.

Expert data development for frontier AI models and agents

A free drop-in MNIST replacement dataset for benchmarking fashion image classifiers.

Spatial reasoning data and game-engine benchmarks for AI agents.

Open-source Python framework for generating grounded synthetic datasets from real tool execution traces.

High-quality audio datasets for speech & conversational AI research

Domain-specific clinical data and RL environments for healthcare AI

Mercor: Hire vetted domain experts for AI model evaluation and training data

Offline, AI-assisted image annotation with SAM2, SAM3 & YOLO-World — one-time purchase, no subscription.

Industrial data layer for robotics with high-density action labeling, validated by humans.

Free open-source annotation for text, images, audio, video, and AI agents.

Multimodal real-world human data for training embodied AI

Decentralized AI training data marketplace with crypto rewards

Open-source dataset labeling and AI evaluation for every data modality

Open-source multimodal lakehouse for AI data curation, feature engineering, search, and training.

Managed training data for AI agents and LLMs — agentic skills, coding, AI safety.

A large-scale photo-realistic synthetic dataset for structured 3D modeling research.

Private-deployment data annotation platform for multimodal AI training.

Crowdsourced data services for AI training, validation, and labeling at scale.

Bright Data's web data platform for AI training and agentic access

Custom multimodal data and evals for perceptual AI training.

Custom audio datasets for training and evaluating voice AI, built in-house to your spec

Enterprise dataset management platform for AI training teams

Training data that gives frontier models taste and judgment for ambiguous work.