XDA’s piece on a $250 second machine fixing a flawed NAS backup strategy hit a real nerve. A single NAS is not a backup, it is a SPOF, and the second machine in a different physical location is where disaster recovery actually starts. The painful part is choosing what software runs between the two ends. Most users default to whatever shipped with their NAS, ignore encryption, never test a restore, and discover the gap during the worst possible week.
We tested 8 of the best apps for backing up to a remote NAS on desktop in 2026. The picks below split between the open-source workhorses that have powered home labs since 2015, the friendly GUIs that sit on top of them, the cloud-style new arrivals, and the vendor tools that ship with consumer NAS hardware. Every entry supports encrypted, deduplicated backups, every entry works over WireGuard or Tailscale, and most are free.
What to look for in a remote NAS backup app
Pick a remote NAS backup app that:
- Encrypts client-side before bytes leave the source machine. If your NAS gets stolen or the storage provider gets breached, the encryption is what saves you. Server-side encryption alone is not enough.
- Deduplicates and compresses on the client. A terabyte of source data becomes 200 GB on the wire and on disk after deduplication, which makes the difference between viable and impractical for internet-speed connections.
- Verifies and prunes automatically. A backup that has never been verified is a backup that has never worked. Verification needs to be scheduled and visible.
- Supports incremental forever rather than full-incremental cycles. Internet upload speeds make a weekly full backup impractical; chunk-based incrementals are the only sensible model.
- Has a tested restore path. The one feature you must rehearse before disaster is the restore. Pick a tool whose docs show clear point-in-time restore examples.
Quick comparison
| App | Best for | Storage backends | Encryption | License |
|---|---|---|---|---|
| Borg + Vorta | Home-lab gold standard | SSH, SFTP, local | Client-side, AES-256 | BSD |
| Restic | Modern open-source successor | S3, SFTP, B2, Azure, GCS, REST | Client-side, AES-256 | BSD |
| Kopia | GUI-first dedup backup | S3, SFTP, WebDAV, B2 | Client-side, AES-256 | Apache 2.0 |
| Duplicati | Cross-platform GUI | S3, SFTP, WebDAV, FTP, Google Drive, OneDrive | Client-side, AES-256 | LGPL |
| Syncthing | Continuous file sync | LAN, internet, relay | TLS, optional folder encryption | MPL |
| rclone | The Swiss army knife of cloud and SFTP | 70+ backends | Client-side, optional | MIT |
| Synology Hyper Backup | Synology to Synology or cloud | Synology, S3, B2, Glacier | Client-side, AES-256 | Proprietary |
| Veeam Agent | Image-level Windows or macOS backup | NAS share, S3 | Client-side, AES-256 | Free tier + Paid |
The 8 best apps for backing up to a remote NAS on desktop
1. Borg + Vorta — best home-lab gold standard
Borg is the deduplicating backup tool that has powered the home-lab Linux scene since 2015 and remains the reliability gold standard. The repository format chunks files, deduplicates across the whole repository, encrypts client-side, and compresses with Zstd. Vorta is the cross-platform Qt GUI that turns Borg into something a non-CLI user can run reliably. Together, they form the home-lab default.
Where it falls short: Cloud object-storage backends are not natively supported, so backups go over SSH or SFTP to a remote server that runs the Borg binary. The first backup is slow because the dedup index is computed locally.
Pricing:
- Free: Open source
- Paid: None
Platforms: Linux, macOS, Windows via WSL. Vorta GUI runs on all three natively.
Download: borgbackup.org and vorta.borgbase.com
Bottom line: The pick if you already have or will set up a Linux endpoint to receive backups.
2. Restic — best modern open-source successor
Restic is the cloud-native Borg successor written in Go that supports almost every storage backend that matters in 2026, from S3 and B2 to Azure Blob and Google Cloud Storage to a plain SFTP target. Single-binary install, no dependencies, and an actively maintained CLI make it the home-lab default that ships fastest on a fresh machine.
Where it falls short: No first-party GUI. Several third-party GUIs exist but none has reached Vorta’s polish for Borg.
Pricing:
- Free: Open source
- Paid: None
Platforms: Linux, macOS, Windows, FreeBSD, native binaries on each.
Download: restic.net
Bottom line: The pick when you want cloud-style storage backends without compromising on encryption or dedup.
3. Kopia — best GUI-first dedup backup
Kopia is the newer entrant that combines Restic’s storage backend flexibility with a polished native GUI on every platform. Encryption, deduplication, compression, and verification are all built-in defaults, and the snapshot policy engine is the most complete on the list. The Kopia repository format also supports concurrent writers, which matters for households with multiple machines backing up to the same target.
Where it falls short: Younger project than Borg or Restic, with fewer veteran adopters. Repository compatibility across major versions has been broken once, which is a small thing but worth remembering.
Pricing:
- Free: Open source
- Paid: None
Platforms: Linux, macOS, Windows, FreeBSD, with native GUIs on the first three.
Download: kopia.io
Bottom line: The pick when you specifically want a GUI from day one and dislike CLI-only tools.
4. Duplicati — best cross-platform GUI
Duplicati is the long-running open-source cross-platform backup tool with a web-based GUI that runs on every desktop OS. Storage backend support is extensive (S3, SFTP, WebDAV, FTP, Google Drive, OneDrive, Backblaze B2), and the scheduling UI is the friendliest on the list. The 2.0 version became stable in 2024 after years in beta.
Where it falls short: Restore speed has historically been slower than Borg or Restic for very large datasets. The .NET-based runtime is heavier than the Go-based Restic or Kopia.
Pricing:
- Free: Open source
- Paid: None
Platforms: Windows, macOS, Linux. Web UI works in any browser.
Download: duplicati.com
Bottom line: The pick for users who specifically want a friendly browser-based GUI and do not mind the .NET footprint.
5. Syncthing — best continuous file sync
Syncthing is the open-source continuous file synchronisation tool. It is not strictly a backup app, it is a peer-to-peer sync engine, but paired with versioning settings it gives you a real-time replicated copy of your data on a remote NAS. The pattern of “Syncthing replicates, Restic versions on the destination” is one of the most popular home-lab setups in 2026.
Where it falls short: Without explicit versioning configuration, Syncthing replicates deletions instantly, which is the opposite of what backup users want. Set staggered or external file versioning before trusting it.
Pricing:
- Free: Open source
- Paid: None
Platforms: Linux, macOS, Windows, FreeBSD, Android.
Download: syncthing.net
Bottom line: Pair Syncthing with one of the snapshot-based tools above for a belt-and-braces backup.
6. rclone — best Swiss army knife
rclone is the universal file transfer tool that supports 70+ storage backends. It is not a deduplicating backup tool by default, but rclone’s encryption layer (rclone crypt) and its sync mode together cover a substantial number of remote-NAS use cases, especially when the target is cloud object storage like Backblaze B2 or Wasabi. The 1.66 release added Restic-style backup mode for experimentation.
Where it falls short: It is a swiss army knife, which means it can do a lot but is not specialised in any one thing. Dedicated backup tools (Restic, Kopia) outperform it on incremental backup specifics.
Pricing:
- Free: Open source
- Paid: None
Platforms: Linux, macOS, Windows, FreeBSD.
Download: rclone.org
Bottom line: The pick when you need to move data between heterogeneous storage backends.
7. Synology Hyper Backup — best vendor tool
Synology Hyper Backup is the backup app that ships with every Synology NAS. It supports incremental forever backups to another Synology NAS, to Synology C2 Cloud, or to third-party object storage (S3, B2, Glacier). The polish is what most other tools on this list lack: a clean GUI, integrated dashboards, alert emails that work out of the box.
Where it falls short: Synology-only at the source, which limits portability if you ever change NAS vendors. The C2 Cloud pricing has been climbing recently.
Pricing:
- Free: Included with Synology DSM
- Paid: Synology C2 cloud storage from $2.99/mo
Platforms: Synology DSM only. Targets include other Synology NAS units, C2 Cloud, and various third-party object stores.
Download: Included with Synology DSM 7.x and later.
Bottom line: Use this if you own a Synology and a friend or family member also owns a Synology. The cross-Synology pairing is uniquely tidy.
8. Veeam Agent — best image-level Windows or macOS backup
Veeam Agent for Microsoft Windows and Veeam Agent for macOS offer free image-level backups of individual machines to a NAS share or S3 endpoint. The free tier is generous, image-based system backups, file-level backups, schedule-based jobs. The Linux version (Veeam Agent for Linux) is also free for individual workstations.
Where it falls short: The Veeam ecosystem is enterprise-leaning, and the documentation can be intimidating for home users. The free tier excludes some advanced features (deduplication storage, multi-OS console).
Pricing:
- Free: Veeam Agent Free tier
- Paid: Veeam Backup & Replication for full enterprise features
Platforms: Windows, macOS, Linux.
Download: veeam.com
Bottom line: The pick when you specifically need image-level (bare-metal recovery) backups of a single PC to a NAS share.
How to pick the right one
If you want the home-lab gold standard: Borg + Vorta. Reliable since 2015, GUI-friendly through Vorta, encrypted client-side.
If you want cloud-native backends without compromise: Restic. The single-binary install and the extensive storage backend list make it the most flexible CLI tool.
If you specifically want a GUI from day one: Kopia. The native GUI on every desktop is the cleanest of the lot.
If you prefer a browser-based scheduling UI: Duplicati. The widest storage backend list of the GUI tools.
If you already have a Synology NAS and the target is also a Synology: Synology Hyper Backup. Nothing else on this list ties two Synology units together as tidily.
If you want bare-metal recovery rather than file-level backup: Veeam Agent. The free tier covers most home use cases.
If you want continuous real-time replication paired with point-in-time snapshots: Syncthing for the replication, Restic or Kopia on the destination NAS for the versioned snapshots.
If you mostly move data between cloud and SFTP backends: rclone. Pair with one of the dedup tools above for the actual backup window.
FAQ
Is a single NAS a backup?
No. A single NAS is a single point of failure, vulnerable to ransomware, theft, fire, flood, and accidental data deletion. The 3-2-1 rule is three copies, on two different media, with one off-site, which a single NAS cannot satisfy on its own.
What is the cheapest off-site backup target in 2026?
Backblaze B2 starts at $6/TB/month with no egress charges within their network. Wasabi is $6.99/TB/month with limited egress. A second NAS at a relative’s house is the cheapest physical option, with the trade-off of higher setup work.
Do I need a VPN to back up to a remote NAS?
For internet-exposed NAS endpoints, yes. Tailscale and WireGuard are the two common picks for home labs in 2026. Either lets you reach the remote NAS without exposing it to the public internet, which is the secure default.
What is the difference between Borg and Restic?
Borg is older, more battle-tested, and Linux-first. Restic is newer, written in Go, supports cloud object storage natively, and ships as a single binary. Borg’s repository format is more efficient at deduplication; Restic’s storage backend flexibility is wider.
Can I back up Windows to a Synology NAS?
Yes. Synology Active Backup for Business is a free Windows agent that ships with DSM 7.x. Alternatively, Veeam Agent for Microsoft Windows can write to a Synology SMB or NFS share. Both options support encrypted, scheduled backups.
