Depending on how much you access per month, Storj DCS[0] and Wasabi[1] can also be interesting choices.
- Storj has the lowest cost per TB, but charges for egress - Wasabi doesn't charge for egress, but has a fair use policy where if you egress more than you store they can kick you off their platform[2] - Wasabi is also a better fit only if you plan to keep your files around for 90+ days (they have a minimum object retention period) - The bandwidth alliance is only available for HTML related content unless you're on a specific paid plan[3]
[0] https://www.storj.io/ [1] https://wasabi.com/ [2] https://wasabi.com/paygo-pricing-faq/#free-egress-policy [3] https://www.cloudflare.com/terms/#28-limitation-on-serving-n...
*opinion is mine, not my employer's