Kopia is a fast and secure open-source backup/restore tool that allows you to create encrypted snapshots of your data and save the snapshots to remote or cloud storage of your choice, to network-attached storage or server, or locally on your machine.
Kopia does not 'image' your whole machine.
Rather, Kopia allows you to backup/restore any and all files/directories that you deem are important or critical.
Publisher’s description
What is KopiaUI?
KopiaUI by Kopia Authors is open-source Windows software in the encryption category. It ranks 6th by popularity among encryption in this catalogue. It is written in Go.
Installation and requirements
The publisher provides EXE (NSIS) installers for 64-bit Windows. It can be installed for the current user only, without administrator rights. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 0.23.1, released on June 16, 2026. The version history goes back to October 23, 2021: 38 releases, all linked to the official files. That is about 8.2 releases a year.
Popularity and file types
The Chocolatey package has been downloaded 31,822 times. The source code on GitHub (kopia/kopia) has 14,405 stars. Similar programs include Cryptomator, Keybase and GNU Privacy Guard.
Project description on GitHub: “Cross-platform backup tool for Windows, macOS & Linux with fast, incremental backups, client-side end-to-end encryption, compression and data deduplication. CLI and GUI included.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Documented silent install
- Installs without administrator rights
- Frequent updates (about 8.2 a year)
- Large user base
Cons
- No native ARM64 build
In short: KopiaUI is an open-source encryption tool for 64-bit PCs. It is actively maintained. Administrators can deploy it unattended.
Is KopiaUI safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
A945DB629E4456D6616595A9B9FDA4BC0407FC02A8D18FBCE8F7F89390307C13· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Security practices (OpenSSF Scorecard)
Automated checks of the kopia/kopia repository on GitHub by the Open Source Security Foundation, last run on October 23, 2026.
- Dependency update tool10
- Actively maintained10
- No dangerous workflows10
- No binaries in the repository10
- Static code analysis10
- Licence declared10
- Tests in CI10
- Contributors from several organisations10
- Pinned dependencies8
- No known vulnerabilities8
- Signed releases8
- Branch protection4
- Code review0
- Restricted token permissions0
- OpenSSF Best Practices badge0
- Fuzzing0
- Security policy0
The score rates how the project is developed and released, not whether the program is safe to install. scorecard.dev
Recent versions
All 38 versions ›38 versions over 5 years · about 8.2 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 0.23.1Latest | June 16, 2026 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
| 0.23.0 | May 12, 2026 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
| 0.22.3 | December 2, 2025 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
| 0.22.2 | November 26, 2025 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
| 0.22.1 | November 25, 2025 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
| 0.22.0 | November 18, 2025 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
| 0.21.1 | July 22, 2025 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
| 0.20.1 | May 26, 2025 | — | 64-bit EXE (NSIS)64-bit EXE (NSIS) |
Install from the command line
Silent install ›winget install --id Kopia.KopiaUI -echoco install KopiaUI -yKopiaUI-Setup-0.23.1.exe /SRelated guide: How to use winget: install and update apps
Information
- Publisher
- Kopia Authors
- Category
- Encryption
- Licence
- Apache-2.0
- Price
- Free
- Source code
- github.com/kopia/kopia
- Written in
- Go
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- EXE (NSIS)
- Version
- 0.23.1
- Released
- June 16, 2026
- Added to the catalogue
- October 23, 2021
- Versions listed
- 38
- Updates / year
- 8.2
- Chocolatey downloads
- 31,822
- GitHub stars
- 14,405
- GitHub forks
- 766
- Website
- github.com
- winget ID
- Kopia.KopiaUI
- Chocolatey package
- KopiaUI
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to KopiaUI
See all ›-
Open source166.2K ↓ -
Keybase6.6.3.3End-to-end encryption for things that matter. Keybase is secure messaging and file-sharing.Open source36.6K ↓ -
GNU Privacy Guard2.5.24GNU Privacy Guard (GnuPG or GPG) is a free-software replacement for Symantec's PGP cryptographic software suite.Open source186.1K ↓ -
Open source78.8K ↓ -
age1.3.2A simple, modern and secure encryption tool (and Go library) with small explicit keys, no config options, and UNIX-style composability.Open source15.6K ↓ -
Open source19.2K ↓ -
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Open source9.4K ↓
Frequently asked questions
Is KopiaUI free?
Yes. KopiaUI is open-source software under the Apache-2.0 licence.
Is KopiaUI safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install KopiaUI with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can KopiaUI be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does KopiaUI run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Where can I download an older version of KopiaUI?
The versions page lists all 38 versions with links to their official installer files, back to October 23, 2021.
Can I use KopiaUI without administrator rights?
Yes, there is a per-user installer that does not need administrator rights.
What are alternatives to KopiaUI?
Cryptomator, Keybase, GNU Privacy Guard, i2pd and age. The alternatives page compares them.
