IIRC, SpiderOak was a close contender but it didn't meet one of our requirements. We were looking for an offer where we would handle support and invoicing of o

IIRC, SpiderOak was a close contender but it didn't meet one of our requirements. We were looking for an offer where we would handle support and invoicing of our clients, with compatibility for Windows and Mac, while being able to keep costs under $10/month/client. We're happy to tell our clients about the service we're using. Pretty much everything seemed to break on one of those points; either the service wanted to do the invoicing, or it was prohibitively expensive.