kapp
kapp is a lightweight CLI tool for deploying Kubernetes applications defined as labeled resource groups. It focuses on diffing, applying, and managing resource changes without handling templating or packaging.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | carvel-dev/kapp |
| Owner | carvel-dev |
| Primary language | Go |
| License | Apache-2.0 — OSI-approved |
| Stars | 1.1k |
| Forks | 131 |
| Open issues | 130 |
| Latest release | v0.65.3 (2026-05-14) |
| Last updated | 2026-06-15 |
| Source | https://github.com/carvel-dev/kapp |
What kapp is
kapp provides declarative Kubernetes deployment via resource diff calculation and ordered application, with built-in waiting logic for resource readiness and no requirement for server-side components or custom CRDs. It integrates with YAML generators like ytt and supports GitOps workflows through label-based resource grouping.
Get the kapp source
Clone the repository and explore it locally.
git clone https://github.com/carvel-dev/kapp.gitcd kapp# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Requires Go knowledge for building from source; prebuilt binaries available via releases and Homebrew for common deployments.
- Label naming and organization strategy is critical; kapp groups resources by labels, so consistent labeling conventions must be established before adoption.
- Integration with YAML generators (ytt, Kustomize) should be evaluated early; kapp is agnostic but documentation assumes familiarity with external tools.
- RBAC policies must be defined to grant kapp service accounts appropriate permissions for apply/delete operations in target namespaces.
- Deployment ordering and resource waiting logic may require tuning for stateful or complex resource dependencies; custom ordering is configurable but requires planning.
When to avoid it — and what to weigh
- Need built-in package management or Helm-like templating — kapp explicitly excludes templating and packaging; use Helm or Kustomize if you need those features integrated into your deployment tool.
- Require server-side state or custom resource definitions — kapp is client-only and does not use custom CRDs; if your workflow demands server-side reconciliation or CRD-based operators, consider alternatives like Flux or ArgoCD.
- Low tolerance for alpha/experimental Carvel ecosystem dependencies — kapp is stable, but tight integration with other Carvel tools (ytt, vendir, etc.) may introduce dependencies on actively-developed projects.
- Complex cross-cluster or multi-tenant orchestration — kapp is designed for single-cluster, label-based resource management; multi-cluster or complex orchestration requires external coordination.
License & commercial use
Apache License 2.0 (Apache-2.0): permissive open-source license permitting commercial use, modification, and distribution with attribution and liability disclaimers.
Apache-2.0 permits commercial use, including in proprietary applications, provided the license and copyright notice are included. No commercial support terms, SLAs, or vendor lock-in are stated in the data; commercial users should evaluate community support via Kubernetes Slack and GitHub issues.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Strong |
| License clarity | Clear |
| Deployment complexity | Low |
| DEV.co fit | Strong |
| Assessment confidence | High |
kapp operates as a client-side tool with no server-side attack surface. Security posture depends on: (1) underlying Kubernetes API authentication and authorization (RBAC); (2) safe YAML source integrity (templating tools, Git); (3) secret management in generated YAML (use Kubernetes native secrets or external tools). No custom code execution or script evaluation in kapp itself. OpenSSF Best Practices badge suggests adherence to security standards; review project security policy and contribution guidelines for vulnerability disclosure process.
Alternatives to consider
Helm
Helm integrates templating, packaging, and deployment; use if you need built-in chart management and version control, but introduces more complexity than kapp.
Flux or ArgoCD
GitOps operators with server-side reconciliation and declarative desired-state management; use if you need continuous reconciliation and multi-cluster orchestration beyond kapp's scope.
Kustomize
YAML templating and patching tool; use if you need configuration management without deployment logic. Often paired with kubectl apply; less feature-rich than kapp for deployment workflows.
Build on kapp with DEV.co software developers
Evaluate kapp for your team's GitOps workflow. Start with prebuilt binaries or Homebrew, review the docs at carvel.dev/kapp, and join the community in Kubernetes Slack.
Talk to DEV.coRelated on DEV.co
Explore the category and the services that help you build with it.
kapp FAQ
Can kapp replace Helm?
Does kapp require cluster admin privileges?
What happens if a resource fails to become 'ready' during deploy?
How does kapp integrate with my existing CI/CD pipeline?
Work with a software development agency
Need help beyond evaluating kapp? DEV.co is a software development agency offering software development services and web development for teams of every size. Our software developers and web developers build custom software, web applications, APIs, and open-source devops integrations — and maintain them long-term.
Ready to streamline Kubernetes deployments?
Evaluate kapp for your team's GitOps workflow. Start with prebuilt binaries or Homebrew, review the docs at carvel.dev/kapp, and join the community in Kubernetes Slack.