APIs · head to head
curl vs Formance
curl
APIs
Command-line tool for transferring data using URLs with wide protocol support
- From
- Free
- Rated
- -
Formance
APIs
Open source double-entry ledger and payment orchestration for money-moving software
- From
- Free
- Rated
- -
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; Formance formance holds no money and provides no regulatory cover, so it must be paired with a payments provider or bank, and buyers occasionally mistake a ledger for a treasury system and discover the gap late.
- They diverge on capability: curl covers HTTP/HTTPS, Formance covers Double-entry ledger.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which curl and Formance actually diverge.
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 Formance
- Double-entry ledger
- Numscript transaction DSL
- Multi-currency
- Payments connectivity
- Reconciliation
- Self-hosted deployment
- Cloud offering
- API and SDKs
What people use each for
The jobs each tool is most often brought in to do.
curl
- API Developmentnot Formance
- API Gatewaynot Formance
- API Testingnot Formance
- API Documentationnot Formance
- Microservicesnot Formance
Formance
- A marketplace splitting a single customer payment between seller, platform fee and tax that needs the split to be atomic and auditablenot curl
- A fintech whose homegrown balances table produced numbers finance could not reconcile and now needs proper double-entry before an auditnot curl
- A payments team that wants one normalised model across several PSPs so reconciliation is not written separately for eachnot curl
- A company that wants its ledger under a licence it can keep running even if the vendor disappearsnot 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
Formance
- Formance holds no money and provides no regulatory cover, so it must be paired with a payments provider or bank, and buyers occasionally mistake a ledger for a treasury system and discover the gap late.
- Numscript is a domain-specific language your team must learn, and while it makes complex splits expressible it also means transaction logic sits outside the languages your engineers already debug well.
- Self-hosting a ledger that must never lose or duplicate a transaction is a serious operational commitment covering backups, upgrades and Postgres tuning, which is real cost the zero licence fee hides.
- Enterprise pricing is not published, so the difference between the free path and the supported path cannot be evaluated without a sales conversation.
- The company is much smaller than the incumbent alternatives, and while the MIT licence protects the code it does not protect the roadmap, so features on the hosted side may arrive slowly or change direction.
Pricing, plan by plan
curl
Free- Open SourceFree
- Full curl functionality
- Community support
Formance
Free- Open SourceFree
- MIT licensed core ledger
- Numscript transaction DSL
- Multi-currency tracking
- Enterprise$undefined/year
- Managed or private deployment
- Payments connectivity and reconciliation
- Support with response commitments
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.
Choose Formance if
- You need double-entry ledger.
- You want to start without paying.
- You work on Linux, Docker, Kubernetes, Web, API.
- You also want numscript transaction dsl.
Questions people ask
- Is curl or Formance better?
- Neither clearly leads. curl starts at Free and Formance at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, curl or Formance?
- curl starts at Free and Formance at Free.
- Does curl or Formance run on more platforms?
- curl runs on Linux, MacOS, Windows, Unix, Mobile. Formance runs on Linux, Docker, Kubernetes, Web, 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 Formance is typically brought in for.
- What can curl do that Formance cannot?
- curl covers HTTP/HTTPS, FTP, Multiple protocols, Universal compatibility. Formance covers Double-entry ledger, Numscript transaction DSL, Multi-currency, Payments 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.
SourceFormance: Is Formance really open source?
Yes. The core ledger is MIT licensed with full source access and no deployment restrictions.
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.
SourceFormance: Does Formance move money?
No. It records and orchestrates movements; the actual payments happen at a PSP or bank you connect.
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.
SourceFormance: What does the enterprise version cost?
Not published. It is an annual subscription quoted per customer.
Formance: Do I have to use Numscript?
Yes for anything beyond the simplest transfers. It is how multi-party transactions are expressed atomically.
Related pages
Other head to heads
- curl vs Appwrite
- curl vs Hasura
- curl vs PocketBase
- curl vs Sanity
- curl vs HTTPie
- curl vs REST Client VSCode
- curl vs Hoppscotch
- curl vs Bruno
- curl vs Kong Gateway
- curl vs Convoy
- curl vs Directus
- curl vs Moov
- curl vs MX Technologies
- curl vs PubNub
- curl vs Skaleet
- curl vs Svix
- curl vs Synctera
- curl vs Kong
- curl vs Column
- curl vs Sila
- curl vs Increase
- curl vs Yapily
- curl vs 10x Banking
- curl vs Tribe Payments
- curl vs Dwolla
- curl vs Tyk
- curl vs Volt
- curl vs Enable Banking
- curl vs Flybits
- curl vs i2c
- curl vs KeystoneJS
- curl vs Liveblocks
- Formance vs Appwrite
- Formance vs Hasura
- Formance vs PocketBase
- Formance vs Sanity
- Formance vs HTTPie
- Formance vs REST Client VSCode
- Formance vs Hoppscotch
- Formance vs Bruno
- Formance vs Kong Gateway
- Formance vs Convoy
- Formance vs Directus
- Formance vs Moov
- Formance vs MX Technologies
- Formance vs PubNub
- Formance vs Skaleet
- Formance vs Svix
- Formance vs Synctera
- Formance vs Kong
- Formance vs Column
- Formance vs Sila
- Formance vs Increase
- Formance vs Yapily
- Formance vs 10x Banking
- Formance vs Tribe Payments
- Formance vs Dwolla
- Formance vs Tyk
- Formance vs Volt
- Formance vs Enable Banking
- Formance vs Flybits
- Formance vs i2c
- Formance vs KeystoneJS
- Formance vs Liveblocks