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APIs · head to head

curl vs Pusher

curl logo

curl

APIs

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

From
Free
Rated
-
Full reviewWebsite
Pusher logo

Pusher

APIs

Realtime messaging API for building live features into apps

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; Pusher the free Sandbox plan is capped at 100 concurrent connections, which is quickly outgrown by production apps.
  • They diverge on capability: curl covers HTTP/HTTPS, Pusher covers Pub/sub channels.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which curl and Pusher actually diverge.

Attributes where curl and Pusher differ
AttributecurlPusher
Pricing modelopen-sourcefreemium
PlatformsLinux, MacOS, Windows, Unix, Mobileweb, ios, android, api
Founded1997Unknown

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

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 Pusher

  • Pub/sub channels
  • Presence channels
  • Client libraries
  • Webhooks
  • 24/7 monitoring
  • Priority support

What people use each for

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

curl

  • API Developmentnot Pusher
  • API Gatewaynot Pusher
  • API Testingnot Pusher
  • API Documentationnot Pusher
  • Microservicesnot Pusher

Pusher

  • Adding live chat to a web or mobile appnot curl
  • Showing realtime presence of online usersnot curl
  • Pushing live notifications or dashboard updatesnot curl
  • Building collaborative features without managing WebSocket serversnot 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

Pusher

  • The free Sandbox plan is capped at 100 concurrent connections, which is quickly outgrown by production apps.
  • Pricing jumps sharply between tiers (e.g. $49 to $99 to $299), leaving few options for teams with moderate but growing usage.
  • Priority support with faster response times costs an additional $3,000/month on top of plan pricing.

Pricing, plan by plan

curl

Free
  • Open SourceFree
    • Full curl functionality
    • Community support

Pusher

Free
  • SandboxFree
    • 200k messages/day
    • 100 concurrent connections
    • Standard support
  • Startup$49/month
    • 1M messages/day
    • 500 concurrent connections
  • Pro$99/month
    • 4M messages/day
    • 2,000 concurrent connections
  • Business$299/month
    • 10M messages/day
    • 5,000 concurrent connections
    • Premium support

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 Pusher if

  • You need pub/sub channels.
  • You want to start without paying.
  • You work on web, ios, android, api.
  • You also want presence channels.
Pusher review

Questions people ask

Is curl or Pusher better?
Neither clearly leads. curl starts at Free and Pusher at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, curl or Pusher?
curl starts at Free and Pusher at Free.
Does curl or Pusher run on more platforms?
curl runs on Linux, MacOS, Windows, Unix, Mobile. Pusher runs on web, ios, android, api.
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 Pusher is typically brought in for.
What can curl do that Pusher cannot?
curl covers HTTP/HTTPS, FTP, Multiple protocols, Universal compatibility. Pusher covers Pub/sub channels, Presence channels, Client libraries, Webhooks.

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
Pusher: What does Pusher cost?

Pusher Channels offers a free Sandbox plan (200k messages/day, 100 connections) and paid plans starting at $49/month for Startup, scaling up through Pro, Business, and several higher tiers up to $1,199/month, plus custom Enterprise pricing.

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
Pusher: Can I change or cancel my plan?

Yes, customers can log into the dashboard and adjust their plan at any time, including upgrading, downgrading, or cancelling.

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
Pusher: How is usage metered?

Usage is measured by concurrent connections and messages per day; a message counts both the publish and each delivery, so publishing one message to 50 subscribers counts as 51 messages.

Source
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