A good comparison article would include costs and the difficulty of obtaining that info... feels fuzzy for most of these, and that's a big problem for adoption.
- siapulse.com contains some information about pricing
- running `siac renter prices` on client on the master branch (yet unreleased) will give you a price estimate given the set of hosts you know about. This feature will be available in the next release.
- Storage cost: about $1 / TB / Mo (for 10-of-30 redundancy)
- Bandwidth cost: about $0.60 / TB
Prices on Storj:
- Not sure how the prices get set, but the prices are advertised on their website
- Storage cost: $15 / TB / Mo
- Bandwidth cost: $50 / TB
Prices on MaidSafe:
- No price given, but the claim is that it will adjust according to supply and demand. Should be within a small factor of Sia if that is the case (Sia's prices are also set by supply + demand).