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APIs · head to head

curl vs ProtonVPN

curl logo

curl

APIs

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

From
Free
Rated
-
Full reviewWebsite
ProtonVPN logo

ProtonVPN

Cybersecurity

High-speed Swiss VPN that safeguards your privacy

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; ProtonVPN free plan limited to one device at a time
  • They diverge on capability: curl covers HTTP/HTTPS, ProtonVPN covers No-logs policy.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which curl and ProtonVPN actually diverge.

Attributes where curl and ProtonVPN differ
AttributecurlProtonVPN
Pricing modelopen-sourcefreemium
PlatformsLinux, MacOS, Windows, Unix, MobileWindows, macOS, Linux, iOS, Android
CategoryAPIsCybersecurity
Founded19972014

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 ProtonVPN

  • No-logs policy
  • Secure Core
  • Kill Switch
  • DNS leak protection
  • Tor over VPN
  • Split tunneling
  • NetShield ad-blocker
  • VPN Accelerator

Both cover

  • Mobile support

What people use each for

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

curl

  • API Developmentnot ProtonVPN
  • API Gatewaynot ProtonVPN
  • API Testingnot ProtonVPN
  • API Documentationnot ProtonVPN
  • Microservicesnot ProtonVPN

ProtonVPN

  • Privacy-focused browsing without subscription costnot curl
  • Multi-device protection with Plus plan supporting 10 devicesnot curl
  • Integrated access to Proton email and cloud services via Unlimited plannot 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

ProtonVPN

  • Free plan limited to one device at a time
  • Free plan restricted to 10 countries with random selection
  • Pricing amounts not clearly published; shown as variable

Pricing, plan by plan

curl

Free
  • Open SourceFree
    • Full curl functionality
    • Community support

ProtonVPN

Free

No published plan breakdown. See the ProtonVPN 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 ProtonVPN if

  • You need no-logs policy.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, iOS, Android.
  • You also want secure core.
ProtonVPN review

Questions people ask

Is curl or ProtonVPN better?
Neither clearly leads. curl starts at Free and ProtonVPN at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, curl or ProtonVPN?
curl starts at Free and ProtonVPN at Free.
Does curl or ProtonVPN run on more platforms?
curl runs on Linux, MacOS, Windows, Unix, Mobile. ProtonVPN runs on Windows, macOS, Linux, 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 ProtonVPN is typically brought in for.
What can curl do that ProtonVPN cannot?
curl covers HTTP/HTTPS, FTP, Multiple protocols, Universal compatibility. ProtonVPN covers No-logs policy, Secure Core, Kill Switch, DNS leak protection. Both handle Mobile 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
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
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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