We set out to create a straightforward, efficient solution for annotating large datasets. Right now, we're focused on computer vision, with NLP and LLM annotation support coming soon!
Cost / License
- Paid
- Proprietary
Platforms
- Online
United States




Sites and apps similar to Appen include UniversalDataTool, which is free and open source. Other options are VGG Image Annotator (VIA), Supervisely, ImageAnnotation.Ai and Label Box. You can choose from more than 10 sites and apps like Appen for Windows, self-hosting, Linux and Mac.
We set out to create a straightforward, efficient solution for annotating large datasets. Right now, we're focused on computer vision, with NLP and LLM annotation support coming soon!




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