Frequently Asked Questions

Do we need another framework for serverless?#

While Serverless Framework and SAM have been around for a while and are quite popular, the local development experience for them isn't great. And they require you to define your resources using the really verbose CloudFormation YAML (or JSON).

In comparison, SST features:

  • A Live Lambda Development environment, that introduces a completely new local development experience for serverless.
  • And it uses AWS CDK, allowing you to define your resources using regular programming languages.

We think these two details, drastically sets SST apart from the rest of the options out there.

Can I use all the CDK constructs in SST?#

Yes. The only caveats are:

Do I have to use the SST higher-level constructs?#

No, you don't have to use them. But they can be really handy when building out your serverless app. For example, the sst.Api construct gives you a really nice interface for defining your routes and giving them permissions.

const api = new Api(this, "Api", {
routes: {
"GET /notes": "src/list.main",
"POST /notes": "src/create.main",
api.attachPermissions(["s3", "dynamodb"]);

Is SST ready to be used in production?#

SST is still under active development. And we are constantly fixing bugs and supporting new use cases and setups.

That said, we see SST being used in production by quite a few of our users over on Seed.

So feel free to give it a try and let us know if you run into any issues.

Can I trust a new framework like SST for my projects at work?#

SST is relatively new but the team behind it has been working on serverless related projects for the past few years. The Serverless Stack Guide has been around since 2017. Seed has been generating revenue since 2018. We are also backed by some of the most prominent investors in Silicon Valley.

So checkout our public roadmap to see where SST is headed.

Is SST flexible enough to support my setup?#

SST has a couple of defaults, like a built-in linter, type checker, and bundler. It also has a list of higher-level constructs.

You can disable the linter, provide your own TypeScript config, and disable bundling. You also don't have to use the higher-level constructs that SST has and just use the native CDK ones.

If you hit a limitation, feel free to hop into our Slack community and let us know about it.

How often is SST's version of CDK updated?#

SST internally includes CDK, so you don't have to. We update this version fairly frequently. But if you need the latest version right away, open an issue and we'll push out an update.

What's the connection to Serverless Framework?#

Originally when SST was released, it was meant to be a way to use CDK alongside your Serverless Framework apps. While you can still do that. SST's Live Lambda Development makes it a first-class dev environment for serverless apps.

So you don't have to use Serverless Framework together with SST.