Self-Hosted Backblaze, Carbonite Alternatives

Why people look for a Backblaze, Carbonite alternative

Backblaze is one of the few consumer backup services with a genuinely good reputation and honest pricing, so this is the entry where switching needs the clearest justification. It comes down to two things: your data sits with a company that holds the encryption keys unless you configure it otherwise, and restoring a large dataset means downloading it — which for a multi-terabyte archive is measured in days, not minutes. There is also the quieter risk that a subscription lapses and the backup quietly disappears.

Which one should you pick?

Restic and BorgBackup are the two serious answers and they differ in a way that matters. Restic writes to any S3-compatible or SFTP backend and handles deduplication client-side, which makes it the better fit for pushing encrypted snapshots to remote storage — including, deliberately, to a Backblaze B2 bucket if you want the cheap storage without the closed client. BorgBackup is faster on large local datasets and has stronger tooling for verifying archive integrity, but needs SSH access to a real server. Kopia sits between them with a clean UI over the same ideas. Whichever you pick, the discipline that matters is not the tool: a backup you have never test-restored is not a backup.

Before you migrate

Self-hosting means you are the one who gets paged when something breaks at 11pm. Before committing, be honest about three things:

• Where will it run? A €4/month VPS handles most of these comfortably. A NAS or spare mini PC is even cheaper if you already own one.
• Who backs it up? A self-hosted service with no backup is worse than a cloud service, because at least the cloud service had someone else's redundancy. Set up automated backups before you migrate real data into it.
• How will you reach it remotely? Most people start with a WireGuard or Tailscale tunnel rather than exposing ports directly. That is the right instinct.

Migrating your data

Nearly every Backblaze, Carbonite competitor listed above ships an import path — CSV, JSON, or a documented export format. The practical move is to migrate one project or one folder first, run both systems side by side for a week, and only then cut over. Export formats are rarely as clean as the marketing suggests, and it is much easier to notice a broken import on a test set than on five years of records.