What is Appen?
Appen provides the human-in-the-loop and automated labeling tools necessary to train large-scale computer vision and NLP models.
About
Appen is a long-established provider of human-generated data for training and evaluating AI models. AI labs and enterprises hire it to collect and label text, speech, image, video and sensor data, to supply expert feedback for fine-tuning and RLHF, to red-team models, and to benchmark model quality and safety. It also sells off-the-shelf datasets, including speech corpora in many languages, and coding datasets for training code models. Work is delivered by a large global workforce under SOC 2 and ISO 27001 processes. Appen is a managed service rather than self-serve software, so there is no free plan or public price list; projects are scoped and quoted by its sales team.
Key facts
- Pricing
- Custom Pricing
- Category
- Data Science
- Website
- https://appen.com/
- Listing updated
- Nov 6, 2026
Facts checked on Oct 30, 2026
Features
- Custom training data collection and annotation
- Reinforcement learning from human feedback and red teaming
- Speech, multimodal and LiDAR data services
- Model evaluation and benchmarking
- Off-the-shelf datasets in many languages
- Global crowd workforce across 500+ locales
Appen FAQ
What is Appen?
Appen provides the human-in-the-loop and automated labeling tools necessary to train large-scale computer vision and NLP models.
What does Appen cost?
Appen pricing is listed as Custom Pricing.
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