>With their block level syncing, Dropbox is still not really replicated in the market. I'd only take issue with their price given the volumes of data I'm dealing with.

Business Strategy 101 teaches that broadly speaking, there are 3 categories into which companies fall, which are cost leadership, differentiation, or segment focus.

If, as you say, your only pain point is the cost of dropbox, then any potential alternative would be competing to be the cost leader, and cost leadership strategies are unattractive for startups. Nobody is investing in early-stage companies building "a cheaper clone of XYZ". It's hard to attract startup talent to "a cheaper clone of XYZ". It's rarely fun for founders to build "a cheaper clone of XYZ".

Unfortunately I think there are limited avenues for successful differentiation in the file sync space. Self-hosted vs cloud, standalone vs OS-level integration, cross-platform vs not? Can't think of much else off the top of my head, and I think big players are able to throw shitloads of engineering talent at OS-level integration features (and that gets you iCloud, basically).

Beating dropbox at their own game wouldn't be impossible, but I think that's why there aren't many competitors in that space.