Kubeletto vs Fly.io
Fly.io runs containers on a global anycast network, routing traffic to the nearest regional machine. Kubeletto focuses on a simpler, single-region Kubernetes-backed runtime — making it the better choice for teams who want to deploy fast without learning Fly's flyctl, Machines API, or multi-region networking concepts.
Why Kubeletto?
Developers who want a straightforward deploy-from-GitHub or Docker-image workflow with zero networking configuration and no regional topology to manage.
Why Fly.io?
Teams building latency-sensitive applications that genuinely benefit from running in 30+ regions simultaneously and are comfortable with Fly's networking model.
Feature Matrix
Compare side-by-side features of Kubeletto and Fly.io. Kubeletto delivers direct container deployments with built-in scale-to-zero autoscaling, whereas Fly.io focuses on complex multi-resource canvas mapping.
| Feature | Kubeletto | Fly.io |
|---|---|---|
| Deployment model | Knative Serving on Kubernetes — serverless containers with scale-to-zero | Fly Machines — lightweight VMs (microVMs) running your container |
| Scale to zero | Enabled by default on every app | Available but opt-in; disabled by default on most plans |
| Global distribution | Single-region optimized deployment | 35+ regions globally with anycast routing |
| CLI complexity | Minimal: kubeletto deploy, logs, rollback | Powerful but complex: fly launch, fly machines, fly wireguard, fly secrets |
Developer Workflow
Deploying applications on Kubeletto is fully automated via direct Git integration or a single CLI command, whereas Fly.io relies on manual project creation on a visual workspace canvas.
Deploy on Kubeletto
- 1
Connect your GitHub repo or specify a Docker image in the Kubeletto console.
- 2
Click deploy — Kubeletto builds (if from source) and starts your container.
- 3
Get a secure *.kubeletto.app HTTPS URL in under 2 minutes.
Deploy on Fly.io
- 1
Run flyctl launch to auto-detect your project and generate fly.toml.
- 2
Configure regions, machine sizes, and volumes in fly.toml.
- 3
Run flyctl deploy to build and push to Fly's registry.
Pricing Comparison
Fly.io charges per Fly Machine (VM) running time, plus network egress. Kubeletto is free during our active beta, with usage-based pricing post-beta. Kubeletto's scale-to-zero means staging apps and side projects cost nothing while idle.
Migration Guide
Migrating your deployment from Fly.io to Kubeletto is a simple, three-step process: export your environment variables, link your repository commit branch, and trigger the deploy.
- 1
Export your environment variables from fly secrets list.
- 2
Create a new app in Kubeletto and connect your GitHub repo or specify your Docker image.
- 3
Set your environment variables in Kubeletto's Environment tab.
- 4
Deploy and update your DNS CNAME to point to your new Kubeletto subdomain.
Frequently Asked Questions
Does Kubeletto support WebSockets like Fly.io?
Yes. Kubeletto's Knative Kourier ingress supports WebSocket connections with the same configuration as any other HTTP service.
Can I run background workers on Kubeletto like Fly Machines?
Yes. Deploy your worker as a separate Kubeletto app with a non-HTTP process as the main CMD. Use shared environment variables to connect it to your primary app's database and queue.