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Thank you for the references. Which one in your opinion is the best out of these three? Probably it depends on the application, but still interesting. Do you use any of these?

I used SIA and STORJ... both are very good! Last time I checked maidsafe they hadn't something ready to test. Developing is rapid and every day something is changing so it is difficult to choose the "winner"... Try them both and choose what fits better to your needs!