APIs · head to head
Formance vs Treblle

Formance
APIs
Open source double-entry ledger and payment orchestration for money-moving software
- From
- Free
- Rated
- -

Treblle
APIs
API observability, security, and governance platform
- From
- $233/month
- Rated
- -
The short version
- Only Formance has a free tier, so it costs nothing to try first.
- Each has a real cost: 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.; Treblle no free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
- They diverge on capability: Formance covers Double-entry ledger, Treblle covers API discovery.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Formance and Treblle actually diverge.
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 Formance
- Double-entry ledger
- Numscript transaction DSL
- Multi-currency
- Payments connectivity
- Reconciliation
- Self-hosted deployment
- Cloud offering
- API and SDKs
Only in Treblle
- API discovery
- Runtime security
- API governance
- Compliance monitoring
- API documentation and analytics
- Agentic AI support
What people use each for
The jobs each tool is most often brought in to do.
Formance
- A marketplace splitting a single customer payment between seller, platform fee and tax that needs the split to be atomic and auditablenot Treblle
- A fintech whose homegrown balances table produced numbers finance could not reconcile and now needs proper double-entry before an auditnot Treblle
- A payments team that wants one normalised model across several PSPs so reconciliation is not written separately for eachnot Treblle
- A company that wants its ledger under a licence it can keep running even if the vendor disappearsnot Treblle
Treblle
- Gaining full visibility into API traffic across multi-cloud environmentsnot Formance
- Detecting shadow APIs and runtime security risksnot Formance
- Meeting compliance audit requirements such as HIPAA or GDPRnot Formance
- Governing API design standards through CI/CDnot Formance
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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.
Treblle
- No free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
- Growth and Enterprise pricing is custom and not published, requiring a sales conversation to budget.
- Core plan is limited to 1 workspace and only 30 days of data retention.
- SSO and on-prem/BYO cloud deployment are reserved for the top Enterprise tier.
Pricing, plan by plan
Formance
Free- Open SourceFree
- MIT licensed core ledger
- Numscript transaction DSL
- Multi-currency tracking
- Enterprise$undefined/year
- Managed or private deployment
- Payments connectivity and reconciliation
- Support with response commitments
Treblle
$233/month- Core$233/month
- Billed yearly
- 5 APIs
- 500 requests/min
- Growth$undefined/month
- Custom APIs and request limits
- 50M requests/month baseline
- API security
- Enterprise$undefined/month
- Unlimited workspaces, APIs, and requests/min
- API governance and compliance
- SSO
Which should you pick?
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.
Choose Treblle if
- You need api discovery.
- You work on web, api.
- You also want runtime security.
Questions people ask
- Is Formance or Treblle better?
- Neither clearly leads. Formance starts at Free and Treblle at $233/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Formance or Treblle?
- Formance has a free tier; the other does not. Paid plans start at Free for Formance and $233/month for Treblle.
- Does Formance or Treblle run on more platforms?
- Formance runs on Linux, Docker, Kubernetes, Web, API. Treblle runs on web, api.
- Can I use Formance for free?
- Yes. Formance has a free tier, so you can try it without paying. Treblle starts at $233/month.
- What is Formance best used for?
- Formance is most often used for a marketplace splitting a single customer payment between seller, platform fee and tax that needs the split to be atomic and auditable, a fintech whose homegrown balances table produced numbers finance could not reconcile and now needs proper double-entry before an audit, a payments team that wants one normalised model across several psps so reconciliation is not written separately for each, a company that wants its ledger under a licence it can keep running even if the vendor disappears. Of those, a marketplace splitting a single customer payment between seller, platform fee and tax that needs the split to be atomic and auditable and a fintech whose homegrown balances table produced numbers finance could not reconcile and now needs proper double-entry before an audit are not what Treblle is typically brought in for.
- What can Formance do that Treblle cannot?
- Formance covers Double-entry ledger, Numscript transaction DSL, Multi-currency, Payments connectivity. Treblle covers API discovery, Runtime security, API governance, Compliance monitoring.
Answered from the vendors’ own pages
Formance: Is Formance really open source?
Yes. The core ledger is MIT licensed with full source access and no deployment restrictions.
Treblle: What does Treblle cost?
Treblle's Core plan costs $233/month billed yearly and covers 5 APIs and 5M requests/month; Growth and Enterprise plans use custom pricing for larger request volumes and advanced features.
SourceFormance: Does Formance move money?
No. It records and orchestrates movements; the actual payments happen at a PSP or bank you connect.
Treblle: Is there a free plan?
Treblle does not offer a free tier; it instead offers a no-credit-card demo rather than free ongoing access.
SourceFormance: What does the enterprise version cost?
Not published. It is an annual subscription quoted per customer.
Treblle: How is usage metered?
Plans are metered by number of APIs monitored and requests per minute/month, with the Core plan capped at 500 requests/min and 5M requests/month.
SourceFormance: Do I have to use Numscript?
Yes for anything beyond the simplest transfers. It is how multi-party transactions are expressed atomically.
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