Human data for frontier AI
Faster iteration. Better real-world model performance with Appen.
Why Frontier AI Teams Choose Appen
Expertise
With over 30 years of data and AI expertise, we deliver future-ready, trusted data and workflows to power up the world’s AI innovators and next-gen models.
Quality
We provide high-complexity, expert data tailored to your unique use cases and task requirements.
Scale
1M+ skilled, multilingual contributors worldwide enable us to prepare data at scale.
Innovation
As an industry-leading AI data solution provider, we continuously invest in research and technology to push the boundaries of what's possible for the future of AI.
Data products for modern AI development
Agentic AI
Building agents that must execute, not just respond
Expert-designed data infrastructure that makes agents reliable at scale - built on golden trajectory creation, failure mode analysis, enterprise RAG evaluation, and full RL environments covering agentic task, verifier and reward design across coding, DevOps, ITSM, finance, and HR.
Frontier Alignment
Made to improve real-world model performance
Domain-specific human intelligence that moves models from text generators to true reasoning agents - spanning multi-step CoT reasoning, bias detection, cultural mitigation, SME-led RLHF, LLM-as-a-Judge, LLM retrieval and search functionality, and more.
- Deep domain expertise across 90+ domains.
- 300+ LLM projects delivered in the last 12 months.
Multimodal AI
High-complexity multimodal data annotation and evaluation
Production-ready data annotation and evaluation built for multimodal language models and vision-language models - from text, image, audio, and video data labeling to SFT demonstrations, adversarial red teaming, rubric-based LLM output evaluation at scale.
- 10B+ data units delivered across 15,000+ AI projects.
- 90,000 evaluations completed in 4 days across 6 domains.
Data Collection
Custom, responsible data collection for frontier models
Custom datasets tailored to the exact conditions your model will operate in - through egocentric video, robotic sensor capture, in-cabin automotive, wearable devices, speech, image, and conversational audio across 10+ global markets, with moderated and unmoderated programs built in.
- Million-scale data units delivered across 500+ languages and 100+ domains
Speech & Audio Data
Bespoke speech and audio data for every voice AI use case
Focusing on the natural interaction of frontier-training models to listen and speak like humans. From expressive TTS synthesis to real-time dialogue covering audio-to-text transcription, conversational AI training data, acoustic scene understanding, and dialectal speech across 500+ languages and locales.
- Coverage across 500+ languages, dialects, and locales.
Physical AI
Egocentric video, robotics, and embodied AI training data
Spatially precise Physical AI data layer for embodied, autonomous, and physically grounded systems - from LiDAR annotation to large-scale egocentric video datasets for world model collection.
- 50,000+ custom data units delivered for frontier Physical AI teams.
