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Kopia
What it is
Kopia is free, open-source backup and restore software for encrypted snapshots of selected files and directories. Snapshots are incremental, and content deduplication avoids saving duplicate file content more than once in a repository. Policies can schedule snapshots and define exclusions, retention, and compression. Recovery options include mounting a snapshot as a local disk, restoring a complete snapshot to a chosen location, or restoring individual files. Kopia encrypts data and filenames before they leave the machine, supporting AES-256 and ChaCha20. Storage can use Amazon S3 and compatible services, Azure Blob Storage, Backblaze B2, Google Cloud Storage, WebDAV, SFTP, local or network storage, and some Rclone providers. Rclone support is experimental. CLI and GUI interfaces are available, along with optional server mode and an API for managing backups across machines. KopiaUI provides a web interface in server mode. Packages support Windows 10 or later, macOS 10.11 or later, and Linux. Users provide and pay for storage separately.
For and against
For
- Incremental snapshots reduce repeated stored content
- Encrypts data and filenames before transfer
- Supports many cloud and local storage targets
- Offers complete or selective restoration
- Includes CLI, GUI, server mode, and API
Against
- Storage must be provisioned and paid separately
- Forgotten repository passwords cannot be recovered
- Each repository has one shared password
- Rclone support is experimental
The verdict
Kopia offers encrypted, deduplicated backups with flexible storage destinations and several management interfaces. It is free software, but storage costs and repository password responsibility remain with the user.
Who it suits
Kopia suits individuals or organizations needing encrypted file backups across Windows, macOS, or Linux. Server mode fits teams managing backups across multiple machines.
Plans and prices
Kopia
Open-source backup/restore software; storage must be provisioned and paid for separately
Read 11 Oct 2026 · kopia.io
On the record
- Backup scope
- filekopia.io · read 20 Sep 2026
- Computer backup
- Yeskopia.io · read 20 Sep 2026
- Data integrity
- Kopia supports Reed-Solomon error correction and includes repository consistency checks.kopia.io · read 11 Oct 2026
- Encryption
- Kopia encrypts backup data and filenames before they leave the machine, and supports AES-256 and ChaCha20.kopia.io · read 11 Oct 2026
- Incremental backups
- Snapshots are incremental, and content deduplication avoids storing duplicate file content more than once in a repository.kopia.io · read 11 Oct 2026
- Interfaces and API
- Kopia provides CLI and GUI interfaces and optional server mode with an API for centrally managing backups across multiple machines.kopia.io · read 11 Oct 2026
- Password limitation
- A repository password is required to read backed-up data, and Kopia says forgotten passwords cannot be recovered.kopia.io · read 11 Oct 2026
- Platform support
- CLI and GUI packages are available for Windows 10 or later, macOS 10.11 or later, and Linux amd64, armhf, or arm64.kopia.io · read 11 Oct 2026
- Purpose
- Kopia is an open-source backup and restore tool for creating encrypted snapshots of selected files and directories.kopia.io · read 11 Oct 2026
- Ransomware protection
- Yeskopia.io · read 20 Sep 2026
- Rclone limitation
- Rclone support is experimental; Kopia says it has been tested with Dropbox, OneDrive, and Google Drive through Rclone.kopia.io · read 11 Oct 2026
- Repository sharing
- Each repository has one password and no access control mechanism for sharing, so anyone given the password can access its data.kopia.io · read 11 Oct 2026
- Restore modes
- mixedkopia.io · read 20 Sep 2026
- Restore options
- Users can mount a snapshot as a local disk, restore a complete snapshot to a chosen location, or selectively restore individual files.kopia.io · read 11 Oct 2026
- Scheduling and retention
- Policies can set automatic snapshot schedules, exclusions, snapshot retention, and compression.kopia.io · read 11 Oct 2026
- Server backup
- Yeskopia.io · read 20 Sep 2026
- Storage costs
- Kopia requires users to provision and pay their chosen storage provider; the software does not select or provide the storage location.kopia.io · read 11 Oct 2026
- Storage integrations
- Supported storage includes Amazon S3 and S3-compatible services, Azure Blob Storage, Backblaze B2, Google Cloud Storage, WebDAV, SFTP, local and network storage, and some Rclone providers.kopia.io · read 11 Oct 2026
