Alternatives to Prolific

Human-recorded computer-use datasets that teach AI agents to operate real software the way people do.

Early-stage San Francisco robotics lab building policies for robots that do real work, and hiring its first researchers.

BioStack Platforms supplies structured clinical datasets and RL environments for healthcare AI teams.

CVAT is an open-source data annotation platform for image, video, 3D point cloud, and audio labeling.

Offline AI image annotation with local SAM2, SAM3 and YOLO-World — one-time purchase from $49.

AfterQuery captures expert reasoning and structures it into SFT, RL rubric, agent, and computer-use training data for frontier models.

Cortex AI supplies real-workplace egocentric video and robot trajectory data for training embodied AI and robot foundation models.

GameEngineBench scores frontier AI models on real game-engine programming — see which model can actually ship UE5 code.

Clickworker turns a verified global crowd of 10M+ people into on-demand data collection, labeling, and validation work for AI, retail, and research teams.

Mundo AI builds culturally-aware audio and video training data, evaluations, and applied research for teams working on perceptual AI.

Velvet sources, verifies, and delivers curated video datasets so AI labs can train interactive and world models with spatial reasoning.

Snorkel AI builds the expert-curated datasets, evaluation rubrics, and runnable environments that fix where frontier models and agents break.

A free 70,000-image Zalando clothing dataset built as a drop-in replacement for MNIST.

Open-source Python framework for generating training datasets from sandboxed tool execution traces

Open-source annotation platform for text, image, audio, video, 3D data and AI agent traces — configured in YAML, self-hosted for free.

Agent training data, RL environments, and safety red-teaming built by Toloka for LLM and agent teams

Open-source data labeling platform for AI evaluation, computer vision, document AI, and human-in-the-loop review across every modality.

Raiinmaker sources rights-cleared custom video datasets and runs real-time human evaluation for generative AI video models.

Structured3D is a free 3.5K-design synthetic dataset for 3D structure and room layout research.

Blockchain-verified autonomous AI agents for trading, enterprise workflows, and monetized data pipelines.

Applied research lab shipping autoscaled RL data and self-evolving benchmarks for tool-use and computer-use agents.

Licensed audio datasets for teams training speech recognition, translation, and voice interaction models

Enterprise dataset management platform for AI training teams

Generate privacy-safe synthetic data with MOSTLY AI's Apache v2 SDK and TabularARGN engine.

PublicAI pays a decentralized workforce in crypto for multi-modal AI training data, annotation, and real coding trajectories.

Mercor supplies vetted domain experts and APEX benchmarks to train, evaluate and post-train frontier AI models.

LanceDB is an open-source multimodal lakehouse that keeps curation, feature engineering, hybrid search, and training on one Lance table.

Labelbox builds RL environments, expert-labeled training data, and Recursion agents that grade their own outcomes

Outlier AI pays subject-matter experts to train AI models remotely through flexible, project-based prompt writing and answer grading.

Autodistill auto-labels image datasets with foundation models, then trains small vision models you own.