Fast and secure open-source backup

backup, cloud, deduplication, encryption, google-cloud-storage
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Linux/macOS Build Status GoDoc

n. thing exactly replicated from the original (Polish)

Kopia is a simple, cross-platform tool for managing encrypted backups in the cloud. It provides fast, incremental backups, secure, client-side encryption and data deduplication.

Unlike other cloud backup solutions, the user in full control of backup storage and is responsible for purchasing one of the cloud storage products (such as Google Cloud Storage), which offer great durability and availability for your data.


Kopia is still in early stages of development and is not ready for general use. The repository and vault data format are subject to change, including backwards-incompatible changes. Use at your own risk.

Getting Started

See User Guide for more information.


Kopia is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.


Kopia is a personal project and is not affiliated with, supported or endorsed by Google.

Cryptography Notice

This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See for more information.

The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with symmetric algorithms. The form and manner of this distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.