datahoarder

I used to use some of those services a little bit, but it's very expensive and generally very slow compared to just using B2, Wasabi, etc..

As far as a more local solution there are tons of those like Ceph, MinIO, GlusterFS, Garage, and many more.

Not sure if it's quite what you're looking for but the first thing that comes to mind for me is Ceph. It's not exactly a service in and of itself but it is self hostable/open source. I currently have a cluster set up across 3 machines with 87 TiB total space and a Ceph Filesystem and thought it was relatively easy to set up (I'd recommend first doing so in a virtual environment to get your bearings if possible, though). Said filesystem is set to make 3 replicas (1 on each machine) of any data written to it and I use Unison to sync files between local storage and the cluster (such that the whole setup is analogous to Windows/Onedrive or MacOS/iCloud). I also plan on setting up a node at my parents' house and making a new replication rule for that. As they live in a different state than me, this would amount to having hot offsite backups (for both me and them). Finally, while I haven't seen it done in practice, in theory, multiple Ceph admins may be able to configure a multi-site setup where they could trade some space on their own clusters with each other for a sort of community based storage pool/hot offsite backups (like a community ran version of Google Drive or similar where the buy-in could be some of your own storage space or money). However, it's important to note that while communications are encrypted and the storage drives can be encrypted as part of setup and operation, any data written to a cluster is not automatically encrypted and if one wants privacy, said data would need to be encrypted separately before writing it to a community cluster.

I use Sia as a renter (paying for storage) and I am also a host (selling storage space) on the Sia network.

Currently use it to host videos from peertube.wtf. It’s not perfect yet, but it works.

https://ipfs.tech/

I think this is the main technology behind that and it is open source... I heard something about it years ago too. I've similarly never used it and am curious now that you mention it if anyone has. I'm unsure how to actually "use" ipfs and/or what tools might use it.

I'm kind of inclined to believe it doesn't work (or doesn't work well) otherwise it probably would be a bigger deal by now and there would be a lot to show off on the ipfs website.

Edit: It looks like this provides S3 compatible storage to IPFS. However, it seems more expensive than B2... So I'm not really sure why one would use it. You'd think IPFS would be attempting to undercut traditional providers.