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APIs · head to head

curl vs Tribe Payments

curl logo

curl

APIs

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

From
Free
Rated
-
Full reviewWebsite
Tribe Payments logo

Tribe Payments

APIs

Combined issuer and acquirer processing platform for fintechs, banks and acquirers

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only curl has a free tier, so it costs nothing to try first.
  • 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; Tribe Payments running both issuing and acquiring through one vendor concentrates operational risk, since a platform fault affects both sides of a client's card business at once rather than just one.
  • They diverge on capability: curl covers HTTP/HTTPS, Tribe Payments covers ISAAC core platform.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which curl and Tribe Payments actually diverge.

Attributes where curl and Tribe Payments differ
AttributecurlTribe Payments
Starting priceFreeOn request
Pricing modelopen-sourcequote
Free tierYesNo
PlatformsLinux, MacOS, Windows, Unix, MobileWeb, API
Founded1997Unknown

Identical on both: 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 Tribe Payments

  • ISAAC core platform
  • Issuer processing
  • Acquirer processing
  • Multi-scheme connectivity
  • Open banking module
  • 3D Secure and fraud tooling

What people use each for

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

curl

  • API Developmentnot Tribe Payments
  • API Gatewaynot Tribe Payments
  • API Testingnot Tribe Payments
  • API Documentationnot Tribe Payments
  • Microservicesnot Tribe Payments

Tribe Payments

  • A bank or fintech wanting to run both card issuing and merchant acquiring on one processing platformnot curl
  • A payment facilitator consolidating separate issuing and acquiring vendor relationships into one contractnot curl
  • A company needing multi-scheme processing across Visa, Mastercard and regional networks like UnionPaynot curl
  • An Asia-Pacific expansion where Tribe's Singapore office provides regional supportnot 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

Tribe Payments

  • Running both issuing and acquiring through one vendor concentrates operational risk, since a platform fault affects both sides of a client's card business at once rather than just one.
  • Pricing for either the issuing or acquiring modules is not published, so budgeting requires a sales conversation.
  • With roughly 60-plus customers, it is smaller scale than Visa or Mastercard-owned processing infrastructure, which is a factor for a client prioritising vendor size and track record.
  • Its client base and support depth are concentrated in the UK and continental Europe, and the Asia-Pacific presence via Singapore is comparatively newer and less proven.
  • As with any combined issuing and acquiring platform, a client that only needs one side still evaluates and pays for a vendor built around doing both, which may not be the most specialised option available.

Pricing, plan by plan

curl

Free
  • Open SourceFree
    • Full curl functionality
    • Community support

Tribe Payments

On request
  • Tribe Payments$undefined/year
    • Pricing not published for issuing or acquiring modules
    • Custom quote required via sales

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 Tribe Payments if

  • You need isaac core platform.
  • You work on Web, API.
  • You also want issuer processing.
Tribe Payments review

Questions people ask

Is curl or Tribe Payments better?
Neither clearly leads. curl starts at Free and Tribe Payments at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, curl or Tribe Payments?
curl has a free tier; the other does not. Paid plans start at Free for curl and On request for Tribe Payments.
Does curl or Tribe Payments run on more platforms?
curl runs on Linux, MacOS, Windows, Unix, Mobile. Tribe Payments runs on Web, API.
Can I use curl for free?
Yes. curl has a free tier, so you can try it without paying. Tribe Payments starts at On request.
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 Tribe Payments is typically brought in for.
What can curl do that Tribe Payments cannot?
curl covers HTTP/HTTPS, FTP, Multiple protocols, Universal compatibility. Tribe Payments covers ISAAC core platform, Issuer processing, Acquirer processing, Multi-scheme connectivity.

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
Tribe Payments: Does Tribe do both issuing and acquiring?

Yes, its ISAAC platform supports both, built for issuing in 2019 and acquiring from 2020.

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
Tribe Payments: How many card schemes does it support?

Visa, Mastercard, Amex, Discover, JCB and UnionPay.

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
Tribe Payments: Where is its customer base concentrated?

The UK and continental Europe, with a newer Singapore office serving Asia-Pacific.

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