I think DigitalOcean is a great hosting provider and is also considered among the top 3 iaas provider available in the indusstry. But, I do believe linode is a also a good hosting provider and is linode secure server could be a good option. If you want to go for an economical version than you can consider linode over digitalOcean. Otherwise, DigitalOcean is a better iaas provider at any day.