Vykar

Vykar is a backup tool designed for speed, encryption, and deduplication, written in Rust. It addresses the need for secure and efficient backups by providing features such as content-defined chunking deduplication, compression, and strong encryption. The tool is built around a simple YAML configuration format and supports both a desktop graphical interface and a built-in WebDAV server for browsing and restoring snapshots.

Vykar offers multiple storage backend options, including the local filesystem, S3-compatible providers, SFTP, and a dedicated REST server with append-only enforcement, quotas, and server-side compaction. Its encryption uses AES-256-GCM or ChaCha20-Poly1305, with Argon2id for key derivation, and it ensures key material is securely zeroized in memory. Deduplication is achieved through FastCDC content-defined chunking, optimized with a tiered deduplication index and local memory-mapped lookup caches. Compression choices include LZ4 and Zstandard. The tool supports concurrent multi-client backups, allowing multiple machines to back up to the same repository simultaneously, with only the commit phase serialized.

The platform features built-in scheduling via a daemon that can run backup cycles on a configurable interval or cron schedule, and provides resource limits for worker threads, backend connections, and bandwidth. Its cross-platform support includes Linux, macOS, and Windows. Vykar also includes hooks and command dumps for monitoring and database backup automation, and supports the management of multiple repositories through its YAML-based configuration.

Vykar's design draws inspiration from other backup tools and emphasizes security, atomic operations, and efficient resource usage. The documentation notes that it should not yet be used for production backups, but encourages testing alongside other backup solutions. No information is provided regarding pricing or licensing.