Method: Official documentation and pricing checked September 28, 2026. No benchmarks were run. Recommendations reflect documented features and billing, not personal testing. Links in this article are ordinary source/vendor links.
Choose SST when you want application code to define and connect cloud resources. Choose Kamal when you want to deploy a containerized web application to servers you operate. Neither choice removes the need to design, budget and maintain the underlying system.
What each tool does
| Question | SST | Kamal |
|---|---|---|
| Main model | Define infrastructure and connect it to application code | Deploy and manage containerized web apps on servers |
| Provider scope | Built-in AWS and Cloudflare components, plus other supported providers | Cloud VMs or bare-metal servers |
| Containers | AWS Service component supports ECS/Fargate | Docker is central to deployment |
| Primary operating decision | Which cloud services and configuration to provision | Which servers and supporting services to operate |
Sources: SST introduction, SST Service and Kamal. This is an architectural comparison, not a performance ranking.
SST is broader than Lambda on AWS
Current SST documentation lists built-in AWS and Cloudflare components and support for other Pulumi/Terraform providers. It uses Pulumi behind the scenes for deployment and providers. The older claim that SST cannot work outside AWS is inaccurate.
Its Service component provisions container services on ECS using Fargate. A Lambda runtime limit therefore does not describe every application deployed with SST. Choose the component that matches the workload, then examine that service’s constraints and pricing.
Provider support also does not make an application automatically portable. A deployment using provider-specific databases, queues or identity services still needs a migration plan if those services change.
Kamal deploys containerized web apps
Kamal’s official site documents rolling restarts, asset bridging, remote builds and accessory services. It supports containerized web apps beyond Rails and targets servers ranging from cloud VMs to bare metal.
The project advertises zero-downtime deployment capabilities. That is not a measured uptime result for your application. Validate health checks, database migrations and rollback behavior with your own deployment before making an availability promise.
The accessories documentation describes configuration for supporting services. Decide explicitly where persistent data resides, how it is backed up and how it will be restored. Deploying a database container does not by itself establish a recovery plan.
Separate SST Console from infrastructure costs
SST Console is optional and currently supports AWS apps. Its documented free tier covers workspaces with 350 active resources or fewer. Above that threshold, pricing is $0.086 per resource for the first 2,000, then $0.032 per resource beyond that.
The free threshold is not a 350-resource deduction from a paid bill: the documentation’s example charges all 351 resources once that workspace exceeds the threshold. That calculates to about $30.19 for the month, excluding cloud infrastructure. Active-resource counting depends on stage age and updates; review the definition before estimating usage.
Build a budget for the same application
For SST, list the selected compute, database, network, storage and observability resources, plus Console if used. For Kamal, list the servers, storage, backups, network transfer and any managed services.
Do not compare a single VM price with a cloud architecture that includes a managed database and redundant services, then attribute the difference entirely to the deployment tool. Define the same data-recovery, capacity and availability requirements first. This guide gives no universal monthly hosting total because the actual configuration has not been specified.
Recommendation
Evaluate SST for cloud-resource composition and its documented application integration. Evaluate Kamal for a container deployment workflow when your team can operate the servers. Use a disposable environment to review deployment and recovery before moving production. No migration experience, setup time, throughput or operating-cost saving is claimed here.
Sources, checked September 28, 2026: SST introduction, SST Service, SST Console and pricing, Kamal, Kamal accessories.