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Tech riderRev. 4 Oct 2026

VolSync

Ch 216.5of 30 Kubernetes Backup Software
  1. 1Runs onself-hosted
  2. 2CostsFree plan
  3. 3Application consistencycrash-consistent
  4. 4Persistent volume backupYes
  5. 5Backup frequencyscheduled
  6. 6Retention optionscustom
6 lines stated Written from the maker's own pages: github.com
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The VolSync homepage

Overview

VolSync is ranked #21 of 30 in Kubernetes backup software on Specifiction. It runs on Self-hosted. There is a free plan.

VolSync plans and pricing

All plans
VolSync (open-source project) Free Kubernetes operator; cluster snapshot controller required; CSI storage recommended github.com · 4 Oct 2026

Compared on Kubernetes backup software

Application consistency
crash-consistentgithub.com
Persistent volume backup
Yesgithub.com
Backup frequency
scheduledgithub.com
Retention options
customgithub.com

Facts

What it does
VolSync is a Kubernetes operator for asynchronous replication of persistent volumes within or across clusters.volsync.readthedocs.io · 4 Oct 2026
Storage independence
Its replication is independent of the storage system and can work across storage types and vendors.volsync.readthedocs.io · 4 Oct 2026
Replication methods
The documented methods are Rclone, Restic, Rsync over TLS, Rsync over SSH, and Syncthing.volsync.readthedocs.io · 4 Oct 2026
Backups
The Restic mover supports persistent-volume backups, with ReplicationSource defining backup policy and ReplicationDestination used for restores.volsync.readthedocs.io · 4 Oct 2026
Rclone use case
Rclone supports asynchronous one-to-many replication through intermediary object storage such as AWS S3.volsync.readthedocs.io · 4 Oct 2026
Rsync use case
Rsync over TLS supports one-to-one asynchronous replication for disaster recovery, test-environment mirroring, and remote processing.volsync.readthedocs.io · 4 Oct 2026
Syncthing use case
Syncthing supports live, many-to-many, eventually consistent synchronization for data spread across peers.volsync.readthedocs.io · 4 Oct 2026
Security
Rsync over TLS uses a TLS-protected tunnel and authenticates the connection with a shared TLS-PSK key.volsync.readthedocs.io · 4 Oct 2026
Mover permissions
Mover pods run in source and destination namespaces, and their permissions affect what data they can replicate and cluster security.volsync.readthedocs.io · 4 Oct 2026
Monitoring
VolSync exposes metrics for monitoring replication relationships via Prometheus.volsync.readthedocs.io · 4 Oct 2026
CSI requirements
A Kubernetes snapshot controller is required; CSI storage with snapshot and clone support is recommended for some functionality.volsync.readthedocs.io · 4 Oct 2026
Installation
The documentation recommends deploying VolSync through its Helm chart on Kubernetes or OpenShift.volsync.readthedocs.io · 4 Oct 2026
License
The project is licensed under GNU AGPL 3.0, with API files additionally under Apache 2.0 and documentation under CC BY-SA 4.0.github.com · 4 Oct 2026
Organization
The project repository is maintained under the Backube GitHub organization; the opened project pages do not state its headquarters or founding year.github.com · 4 Oct 2026

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Where it ranks on Specifiction

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Sources