BackupKit vs Duplicati

Duplicati is the obvious comparison for BackupKit. It's free, open source, supports basically every cloud backend you can think of, runs on Windows/macOS/Linux, and has been around since 2008. If you're cost-sensitive and willing to put in some effort, Duplicati is hard to beat on paper.

BackupKit costs money. It's Windows-only. It does roughly the same thing — encrypted, scheduled backups to any storage destination — but with a focus on UX, reliability, and a polished single-purpose flow.

So why pay for BackupKit when Duplicati is free? It comes down to whether you treat your backup tool as infrastructure or as a hobby project. Both are valid.

Destinations & protocols

Both tools cover essentially the same range: S3, GCS, Azure Blob, Google Drive, Dropbox, OneDrive, Box, MEGA, plus FTP, FTPS, SFTP, WebDAV and local/network drives. Duplicati supports a few extra niche backends (Tardigrade, OpenStack Swift, Backblaze B2 native, etc.) that BackupKit doesn't.

If your backup destination is a mainstream cloud or any standard server protocol, both will connect. If you're using an obscure object store, check Duplicati's backend list first.

Reliability and the “Duplicati just stopped” problem

Duplicati's biggest issue is the reputation. Search any forum and you'll find threads where backups silently fail, restore breaks after a corruption, or the database needs rebuilding for hours. Duplicati 2 has been in “beta” for years for a reason — the storage format and dedupe engine are sophisticated, and that complexity sometimes bites users.

BackupKit's approach is deliberately simpler. Files are compressed into versioned ZIP archives (with AES encryption), retention is by days or count, and restore is the inverse operation. There's no complex local database to corrupt, no “repair” mode you'll ever need to invoke.

If you want the most space-efficient backups possible (block-level dedup), Duplicati wins. If you want backups that always work and restore reliably, BackupKit's simpler model is the safer bet.

Encryption

Both encrypt client-side before upload. Duplicati uses AES-256 via GnuPG-compatible primitives. BackupKit uses standard AES-256 in the ZIP format. In both cases, your password is the only thing protecting your data — lose it and your backups are gone.

Practical difference: Duplicati's encrypted archives can only be restored by Duplicati itself. BackupKit's archives are standard encrypted ZIP files — any tool that reads encrypted ZIPs (7-Zip, WinRAR, the built-in Windows ZIP handler with extensions) can read them. If you ever stop using BackupKit, your backups are still readable.

Interface and day-to-day use

Duplicati runs as a local web service — you configure backups in your browser at localhost:8200. It works, but the UI is dated, occasionally confusing (which option is “source” vs “destination” on this screen?), and feels like a 2014 project that hasn't had a serious UX pass.

BackupKit is a native Windows app with a three-step wizard, a backup list view with health status per job, and a one-click restore. The whole point of paying is that you spend less mental energy on the tool itself.

Notifications and automation

Duplicati supports email notifications and webhook-style alerts via its built-in “send mail” and external script hooks. It works but requires manual config and some scripting.

BackupKit ships with first-class integrations: SMTP email, Telegram, generic webhooks, local script triggers, and in-app tray popups, all configurable from a single Integrations panel.

Price

Duplicati is free. BackupKit is $6/month, $50/year, or $149 lifetime. There's no escaping that gap — if every dollar matters and you have the time to babysit, Duplicati is the right call.

Bottom line

Pick Duplicati if you're cost-sensitive, comfortable troubleshooting open-source tooling, and don't mind the occasional database rebuild. The price is right and the feature set is enormous.

Pick BackupKit if your time is worth more than $6/mo, you want backups that just work without a web UI hosted on your own machine, and you'd rather use a polished native app than a self-hosted service.