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APIs · head to head

curl vs SST

curl logo

curl

APIs

Command-line tool for transferring data using URLs with wide protocol support

From
Free
Rated
-
Full reviewWebsite
SST logo

SST

Cloud

Build full-stack apps on your own infrastructure

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: curl open-source with no vendor pricing: curl is free and open-source under GPL 3.0; no subscription or licensing costs apply; SST primarily optimized for AWS with Cloudflare support
  • They diverge on capability: curl covers HTTP/HTTPS, SST covers Single config file.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which curl and SST actually diverge.

Attributes where curl and SST differ
AttributecurlSST
Pricing modelopen-sourceUnknown
PlatformsLinux, MacOS, Windows, Unix, MobileAWS, Cloudflare, Node.js
CategoryAPIsCloud
Founded1997Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in curl

  • HTTP/HTTPS
  • FTP
  • Multiple protocols
  • Universal compatibility
  • Scripting tools
  • Linux support
  • MacOS support
  • Windows support

Only in SST

  • Single config file
  • Resource linking
  • Local development
  • Multi-cloud support
  • Multiple deployment stages
  • VPC tunneling

What people use each for

The jobs each tool is most often brought in to do.

curl

  • API Developmentnot SST
  • API Gatewaynot SST
  • API Testingnot SST
  • API Documentationnot SST
  • Microservicesnot SST

SST

  • Deploying Next.js frontends with serverless backendsnot curl
  • Managing databases and storage alongside application codenot curl
  • Creating staging environments for feature testingnot curl

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

curl

  • Open-source with no vendor pricing: curl is free and open-source under GPL 3.0; no subscription or licensing costs apply
  • Commercial support costs hidden: site references 'commercial support available' but pricing is not detailed or accessible from homepage
  • No SaaS model: curl is a command-line tool and library; costs are limited to optional commercial support contracts (pricing unknown)
  • Self-support burden: free software means customers rely on community forums or undisclosed commercial support pricing

SST

  • Primarily optimized for AWS with Cloudflare support
  • Learning curve for developers unfamiliar with infrastructure concepts
  • Limited documentation for some advanced use cases

Pricing, plan by plan

curl

Free
  • Open SourceFree
    • Full curl functionality
    • Community support

SST

Free

No published plan breakdown. See the SST review.

Which should you pick?

Choose curl if

  • You need http/https.
  • You want to start without paying.
  • You work on Linux, MacOS, Windows, Unix, Mobile.
  • You also want ftp.
curl review

Choose SST if

  • You need single config file.
  • You want to start without paying.
  • You work on AWS, Cloudflare, Node.js.
  • You also want resource linking.
SST review

Questions people ask

Is curl or SST better?
Neither clearly leads. curl starts at Free and SST at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, curl or SST?
curl starts at Free and SST at Free.
Does curl or SST run on more platforms?
curl runs on Linux, MacOS, Windows, Unix, Mobile. SST runs on AWS, Cloudflare, Node.js.
Can I use curl for free?
Both have a free tier, so you can try either at no cost before committing.
What is curl best used for?
curl is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what SST is typically brought in for.
What can curl do that SST cannot?
curl covers HTTP/HTTPS, FTP, Multiple protocols, Universal compatibility. SST covers Single config file, Resource linking, Local development, Multi-cloud support.

Answered from the vendors’ own pages

curl: How much does curl cost?

curl is free and open-source software under the GPL 3.0 license. There is no cost to download, use, or modify the software.

Source
SST: Is SST free?

Yes, SST is open source and free. You only pay for cloud resources from AWS and other providers.

Source
curl: Is commercial support available for curl?

Yes. The curl website references 'commercial support available,' but pricing and details are not disclosed on the homepage and require visiting the support page.

Source
SST: What cloud providers does SST support?

SST supports over 150 providers through built-in AWS and Cloudflare components, plus Pulumi and Terraform providers.

Source
curl: Can I sponsor curl financially?

Yes. The curl website offers an option to 'Sponsor curl financially.' Visitors can donate to support curl development, but the donation link must be accessed through the site's support section.

Source
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