There is no overall repository size limitation in Assembla.
However, due to general Git design specifics, we apply a strict maximum file size limit to prevent one repository from generating an excessive load and affecting other customers on our servers.
Maximum Git file size limit: 400MB
Git is not a very good solution if you need to work with large binary files. You may consider using Git Large File Storage (LFS) or switching to Perforce if you want to commit large binary files.
You may also be interested in Assembla's Private Installation on dedicated hardware, which is free of the limitation mentioned above.
If you have any questions or need our assistance, don't hesitate to contact us at support@assembla.com.