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Backblaze and Spider Oak both have backup services designed to back up a single machine or small group of machines, rather than multiple terabytes of scientific data. That includes the backup software and the cloud storage costs bundled into a single fee. Backblaze is only for Windows and Mac, While Spider Oak also supports Linux. The both list prices at the above links.
If you don't use an all-in-one provider, then you will need to choose both backup software and a destination for your data. Here are some options.
Some Cloud Storage Provider Options and Pricing as of 11/2020 - Trade-offs will be in terms of storage cost, API cost and restore speed. While "archive" tier storage is listed, we do not suggest using them for backups primarily due to API related costs
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