Formance

Open Source

Open-source programmable ledger for modelling money movement in your own stack.

Overview

Formance is an open-source programmable ledger for modelling money movement, using a purpose-built DSL called Numscript to express transactions.

Splits, holds, and multi-party transfers are declared in Numscript rather than implemented in application code, producing a deterministic and auditable transaction history. It can be self-hosted or used as a managed cloud service, with connectors for common payment processors.

Common use cases

Model money movement in a programmable ledger
Express splits and holds in the Numscript DSL
Reconcile against external payment processors
Self-host a ledger you fully control

Key Features

Open-source programmable ledger
Numscript DSL for expressing money movement
Deterministic, auditable transaction history
Self-host or use the managed cloud
Connectors for common payment processors
Reconciliation and orchestration tooling

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