SpiderOak is well suited for local backups of the computer the client resides on. It is well suited for local area storage backups. It is less suited for remote backups, over a VPN or wide area where the data is continually changing. For data that continually changes, like in our document management system, the client needs to be on the same network as the data.
It is the most appropriate tool to quickly share documents with someone you don't want to give access to your company's own online library, yet you have to share files. It's great that there's no need to create a user, nor for uploading or downloading files. Just have in mind that the documents on the link have an expiration day!
As noted previously, sometimes it can take more than once to upload and share a file if you are using Chrome. It doesn't happen often but of course it always seems to when we are on a really tight deadline. It just takes patient in those cases
WeTransfer is extremely reliable 99% of the time. There has been twice in 4 years that their service was unavailable due to server outage for several hours.
While I gave them a 7, it is in regards to the access to support. This is a business application and not being able to call them can sometimes be a problem especially when you need immediate support. They still tend to manage their support on a consumer line model and not a business grade model. With that said, I will say they are very knowledgeable of the product and how to resolve most any issue when I contact them.
I've only reached out to WeTransfer support once, but they were prompt, courteous, and answered my question. I assume that future interactions would be the same, I'm looking forward to being a long term customer.
In regards to overall performance SpiderOak is not as customizable as Unitrends, but based on the annual cost for SpiderOak and how we use the product, for a "Backup" to our primary backup solution, it is a welcomed option to our backup strategy when you consider the versioning, zero knowledge, share features and unlimited data.
Dropbox is too complex and unreliable to use. I have had many headaches with files not downloading properly, going missing or not opening. I have to spend a lot of time to figure out what I need to do. And just as you think you have everything under control, you set up a nice work environment with organized folders, you realize your storage space is up anyway! Since I've discovered WeTransfer, I never went back to Dropbox.