Appen
Appen delivers AI training data, annotation and model evaluation across RLHF, agentic, multimodal, speech and physical AI work.
About
Appen, founded in 1996 and listed on the ASX as APX, supplies training data and evaluation services to AI teams. Its offerings include frontier alignment work such as RLHF, reasoning and safety, agentic AI trajectories and RL environments, multimodal and speech annotation, physical AI data from LiDAR and sensors, and model integrity testing for hallucination and bias. It also provides research services like LLM-as-a-judge and synthetic data, and coding datasets. Headquarters are in Sydney, with a US office in Kirkland, Washington.
- Organization type
- ai company
- Headquarters region
- Sydney
- Founded
- 1996
- Listings in the graph
- 0
- Last updated
- 6 October 2026
- Published
- 6 October 2026
Data sources & provenance
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- Data quality
- Data quality: Editorially Reviewed
- Primary source
- appen.com
- Sources cited
- 2
- Last reviewed
- 6 October 2026
- Last updated
- 6 October 2026
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