Sveltos
Sveltos is an open-source Kubernetes add-on controller for deploying and managing applications and add-ons across clusters from a central management plane.
What Sveltos is
Sveltos is an open-source Kubernetes add-on controller for deploying and managing applications and add-ons across clusters from a central management plane. It supports Helm charts, raw YAML and JSON, Kustomize overlays, Carvel ytt, and Jsonnet. Sveltos extends GitOps workflows and integrates with Flux sources to distribute configurations. Label selectors can target clusters, while ClusterProfile and namespace-scoped Profile resources support fleet-wide and tenant-specific settings. It monitors deployed resources for drift and can report or reconcile differences, depending on configuration. Its event framework uses Lua or CEL conditions to trigger deployments or updates. ClusterPromotion supports staged rollouts, and enterprise rollout pipelines add health checks between stages. Pull Mode allows a managed-cluster agent to poll outbound, which can avoid inbound firewall rules and support restricted or air-gapped environments. The free Open Source offering includes core features and community support. Enterprise Premium costs $960 a year per cluster and includes SLA-backed priority technical support.
Good
- Supports multiple configuration formats
- Integrates with Flux sources
- Can report or reconcile configuration drift
- Staged rollouts support progressive delivery
Watch out
- Enterprise Premium costs $960 a year per cluster
- Priority SLA-backed support is in the paid plan
- Reconciliation depends on configuration
Who it suits
Sveltos suits teams managing add-ons and applications across multiple Kubernetes clusters, including those using GitOps workflows. Pull Mode may suit restricted or air-gapped environments, while Enterprise Premium is for users seeking priority support.
Verdict
Sveltos provides multi-cluster deployment, drift management, event automation, and staged rollouts, with a free core offering. Teams should distinguish community support from the per-cluster Enterprise Premium support plan.
Plans and prices
From Sveltos's own pricing page, checked 30 Sep 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Open Source | Free | per cluster · all Sveltos core features · GitHub issue management · public documentation · community Slack support |
| Enterprise Premium | $960 a year | priority technical support SLA-backed · priority Slack channel · zero-downtime security patches · priority bug fixes and feature requests · architectural guidance and best practices · per cluster / year |
The facts
Each one read from Sveltos's own pages, with the date it was checked.
What it does
- AI management
- The enterprise offering includes an MCP server for natural-language cluster management, troubleshooting, and diagnostics.checked 30 Sep 2026
- Deployment formats
- It supports Helm charts, raw YAML/JSON, Kustomize overlays, Carvel ytt, and Jsonnet.checked 30 Sep 2026
- Drift management
- Sveltos monitors deployed resources for configuration drift and can report drift or reconcile resources to the desired state, depending on configuration.checked 30 Sep 2026
- Event automation
- Its event framework uses Lua or CEL conditions to watch cluster events and trigger resource deployments or updates.checked 30 Sep 2026
- GitOps
- Sveltos extends GitOps workflows and integrates with Flux sources to distribute configurations across managed clusters.checked 30 Sep 2026
- Installation
- The FAQ says Sveltos can be installed on a management cluster with a Helm chart or a single YAML manifest.checked 30 Sep 2026
- Notifications
- Sveltos can send notifications through Slack, Teams, Discord, Webex, Telegram, SMTP, or Kubernetes events.checked 30 Sep 2026
- Progressive rollouts
- ClusterPromotion supports staged rollouts of cluster configurations and add-ons, with enterprise rollout pipelines offering health checks between stages.checked 30 Sep 2026
- Purpose
- Sveltos is an open-source Kubernetes add-on controller for deploying and managing add-ons and applications across clusters from a central management plane.checked 30 Sep 2026
- Restricted environments
- Pull Mode lets a lightweight agent in a managed cluster initiate outbound polling, avoiding inbound firewall rules and supporting air-gapped or restricted environments.checked 30 Sep 2026
- Scale
- The official site says Sveltos was tested against 15,000 vclusters.checked 30 Sep 2026
- Support
- The free community offering includes GitHub issue management, public documentation, and community Slack support; Enterprise Premium lists priority SLA-backed technical support.checked 30 Sep 2026
- Targeting and tenancy
- Label selectors target clusters, while ClusterProfile and namespace-scoped Profile resources support fleet-wide and tenant-specific configuration.checked 30 Sep 2026
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