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APIs · head to head

curl vs WebdriverIO

curl logo

curl

APIs

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

From
Free
Rated
-
Full reviewWebsite
WebdriverIO logo

WebdriverIO

Testing

Open source Node.js browser and mobile automation framework, governed under the OpenJS Foundation with Sauce Labs as a premium sponsor

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; WebdriverIO its lead maintainer's day job and the project's most visible sponsorship both sit with Sauce Labs, a closer single-vendor tie than some other OpenJS projects, worth weighing for teams that specifically want vendor-neutral tooling.
  • They diverge on capability: curl covers HTTP/HTTPS, WebdriverIO covers WebDriver and BiDi protocol support.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which curl and WebdriverIO actually diverge.

Attributes where curl and WebdriverIO differ
AttributecurlWebdriverIO
Pricing modelopen-sourceOpen source, no licence fee
PlatformsLinux, MacOS, Windows, Unix, MobileLinux, macOS, Windows, iOS, Android
CategoryAPIsTesting
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 WebdriverIO

  • WebDriver and BiDi protocol support
  • Built-in test runner
  • Appium integration
  • Service plugin ecosystem
  • Page object support
  • Component testing

What people use each for

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

curl

  • API Developmentnot WebdriverIO
  • API Gatewaynot WebdriverIO
  • API Testingnot WebdriverIO
  • API Documentationnot WebdriverIO
  • Microservicesnot WebdriverIO

WebdriverIO

  • A JavaScript or TypeScript team wanting a batteries-included test runner covering both web and mobile automationnot curl
  • A team already using Sauce Labs or BrowserStack that wants first-class service plugin support for those platformsnot curl
  • An organisation automating both browser and Appium-based mobile tests from one framework rather than two separate toolsnot curl
  • A team wanting WebDriver BiDi protocol support for newer, more reliable browser automation than classic WebDriver alone providesnot 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

WebdriverIO

  • Its lead maintainer's day job and the project's most visible sponsorship both sit with Sauce Labs, a closer single-vendor tie than some other OpenJS projects, worth weighing for teams that specifically want vendor-neutral tooling.
  • Playwright has captured much of the newer end-to-end JavaScript testing mindshare, so WebdriverIO's plugin ecosystem and community size, while real, are smaller than Playwright's.
  • The dual protocol support for both classic WebDriver and WebDriver BiDi adds real configuration complexity for teams that just want one straightforward automation path.
  • Documentation and community answers assume a working knowledge of WebDriver concepts, so teams new to browser automation face a steeper ramp than a more opinionated, simpler framework.
  • As with other OpenJS-governed projects, there is no vendor SLA or paid support tier for the framework itself, only for the commercial device clouds it integrates with.

Pricing, plan by plan

curl

Free
  • Open SourceFree
    • Full curl functionality
    • Community support

WebdriverIO

Free
  • WebdriverIOFree
    • Full functionality, no usage limits
    • Community support via Discord and GitHub
    • Sauce Labs and BrowserStack sponsor the project but do not control its licensing

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 WebdriverIO if

  • You need webdriver and bidi protocol support.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, iOS, Android.
  • You also want built-in test runner.
WebdriverIO review

Questions people ask

Is curl or WebdriverIO better?
Neither clearly leads. curl starts at Free and WebdriverIO at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, curl or WebdriverIO?
curl starts at Free and WebdriverIO at Free.
Does curl or WebdriverIO run on more platforms?
curl runs on Linux, MacOS, Windows, Unix, Mobile. WebdriverIO runs on Linux, macOS, Windows, iOS, Android.
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 WebdriverIO is typically brought in for.
What can curl do that WebdriverIO cannot?
curl covers HTTP/HTTPS, FTP, Multiple protocols, Universal compatibility. WebdriverIO covers WebDriver and BiDi protocol support, Built-in test runner, Appium integration, Service plugin ecosystem.

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
WebdriverIO: Is WebdriverIO owned by Sauce Labs?

No, it is governed by the OpenJS Foundation, though its lead maintainer works at Sauce Labs and Sauce Labs is a premium project sponsor.

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
WebdriverIO: Is it free?

Yes, entirely open source with no licence fee.

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
WebdriverIO: How does it compare to Playwright?

Both are capable, free JavaScript end-to-end testing frameworks; Playwright has a larger and faster-growing community currently, while WebdriverIO has a longer history and broader classic WebDriver protocol support.

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