Kopia vs Restic Mailer
A side-by-side comparison of two self-hosted backup & recovery options — licensing, setup difficulty, resource needs, and what each one replaces.
Kopia
Fast, encrypted backup with a clean interface
VS
Restic Mailer
Notification wrapper for restic backup jobs
| Feature | Kopia | Restic Mailer |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 94 · Excellent | 76 · Good |
| Category | Backup & Recovery | Backup & Recovery |
| License | Apache-2.0 | MIT |
| Language | Go | Shell |
| Setup difficulty | Easy | Easy |
| Min. RAM | 256 MB | 64 MB |
| Deployment | binary, docker | docker, bare-metal |
| GitHub stars | ★ 14,188 | ★ 663 |
| First released | 2019 | 2018 |
| Replaces | Backblaze, Carbonite | Backblaze |
What are Kopia and Restic Mailer?
Kopia
Kopia is a fast and secure backup tool that creates encrypted, deduplicated snapshots and offers both a CLI and a desktop GUI. It targets users who want modern backups with a clean interface. It is deployed as a binary or via Docker.
- Encrypted deduplicated snapshots
- Both CLI and desktop GUI
- Many storage backends
- Compression and policies
Restic Mailer
A wrapper around restic that runs backups on schedule and emails detailed success or failure reports. It adds visibility to unattended restic deployments.
- Scheduled restic runs
- Email job reports
- systemd integration
- Unattended backups
Kopia vs Restic Mailer: key differences
Kopia is written in Go, while Restic Mailer is built with Shell. Licensing differs — Apache-2.0 for Kopia versus MIT for Restic Mailer. Restic Mailer is the lighter option, starting around 64 MB of RAM against 256 MB for Kopia. Kopia has the considerably larger community, at 14,188 GitHub stars versus 663.
Why pick each one
Choose Kopia if…
- GUI and CLI both available
- Fast and efficient
- Modern design
Watch out for
- Younger than Restic
- Advanced options can confuse
Choose Restic Mailer if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Written in Shell
Frequently asked questions
Is Kopia or Restic Mailer better?
Neither is universally better. Kopia has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are Kopia and Restic Mailer free and open-source?
Yes. Kopia is licensed under Apache-2.0 and Restic Mailer under MIT. Both can be self-hosted at no software cost.
Can I run Kopia and Restic Mailer with Docker?
Kopia: yes. Restic Mailer: yes.
Which is lighter on resources, Kopia or Restic Mailer?
Restic Mailer has the smaller minimum footprint at 64 MB of RAM, compared to about 256 MB for Kopia. Real-world usage depends on library size, user count, and enabled features.