| Appen reviews | sitejabber.com | Current |
| Appen reviews | trustpilot.com | Current |
| Appen Social Media Evaluator Guide | quickprepper.com | Apr 03, 2016 |
| Appen Butler Hill | raymondselda.com | Sep 26, 2015 |
| Get Paid For Using Social Media: Appen Social Media Evaluator | workfromhomehappiness.com | Jun 29, 2015 |
| Appen Butler Hill Work at Home Search Engine Evaluation | realwaystoearnmoneyonline.com | Unknown |