If you need a robust 3D engine that can be white-labelled for scalable bespoke applications and more than what's offered with the Premium account, you need the Enterprise plan.
Benefits
Enterprise licenses are negotiated on an individual basis and may vary slightly between different customers. However, benefits typically include:
All Premium account benefits
Sketchfab for Teams capabilities
Custom upload volume per month
500 MB file size limit per upload
Custom download volume per month
Private and Password-protected models
Up to 100 Annotations per scene
Custom model backgrounds and HDR environments
Ability to upload custom MatCap images
Ability to add camera limits
App-free AR viewing of models
Ability to duplicate models
Ability to download your own models
Option to hide suggested content from other users
Access to the Viewer API for Enterprise use
Ability to bypass end-user authentication for uploading or downloading via the Data API
Enterprise badge next to your username
Option to remove the Sketchfab watermark from the embedded viewer
Embed options
The Premium and Enterprise plans allow Sketchfab users to hide all viewer controls and Sketchfab branding from the embedded viewer.
If you'd like to sign up for a custom Enterprise plan, or you have questions about the Enterprise plan itself, please reach out using the chat window on this page.