* Are they one of the market leaders?
* Do they have a company blog? Are they passionate about their product? (Backblaze's technical articles are always a treat; barely a word from Crashplan.)
* Do they regularly interact with their users, e.g. on HN? (I often see Backblaze commenting on relevant articles.)
* Is their website user-focused, or is it aimed at the enterprise? (Crashplan's website is a confusing mess.)
* Do they offer secondary products that relate to their primary offering? (B2 leverages Backblaze's fine-tuned backup architecture.)
* Is their software well-built/designed, or is it annoying and bloated? (Crashplan's client forces you to wait for reindexing every time you check a new folder! The tree view is also very annoying, and Backblaze's whitelist just makes a whole lot more sense.)
A shame for Crashplan users, but I hope this change ensures BB's longevity for many more years!