Back in the day we could have written pages worth of comparisons about Mozy & Carbonite. These days it’s much simpler: Carbonite still offers unlimited access, Mozy does not. Therefore, Carbonite wins.
We feel the new battle is between Carbonite and BackBlaze. White there are a few others that offer unlimited backup as well, we feel that BackBlaze is the most straight-up, easy to use, and best comparison to Carbonite. Simply based on price, we recommend BackBlaze as it’s only $50/year vs. $59 for Carbonite. But honestly, you can’t go wrong with either.