Harrified Ledger is a double-entry, event-sourced ledger you license and run in your own environment — your instance, your database, your rules. Build your product around a financial core that always balances.
{ "idempotencyKey": "pay_9f2a...", "lines": [ { "account": "cash", "debit": 10000 }, { "account": "revenue", "credit": 10000 } ] }
Everything a modern fintech needs from its ledger — correctness guarantees, a full audit history, and the freedom to run it yourself.
Debits always equal credits — guaranteed. Every posting is validated and committed as one atomic transaction, so your ledger can never end up unbalanced or half-written.
Know exactly what every balance was at any moment. Each change is captured as an immutable event, giving you replayable history and audit trails that reconcile by design.
Hold and move value across any number of currencies. Built-in rate tables, quotes, and configurable spreads settle every cross-currency transfer cleanly as a single balanced entry.
Handle more transactions by adding capacity, not re-architecting. The ledger scales out horizontally, so throughput keeps pace as your business grows.
Plug in your existing identity provider and keep full ownership of your users — Harrified Ledger authenticates against your IdP and never stores their credentials. No IdP yet? An optional IAM module is bundled in.
Run Harrified Ledger in your own environment on your own database. Your ledger data never leaves your infrastructure — we never host or touch it.
Harrified Ledger is dual-licensed. The full engine is open source under the AGPL-3.0 — same code, same source tree. A commercial license is available when the AGPL doesn't fit your product.
A gRPC service mesh behind a single API gateway. The ledger-core is the leaf authority — it calls no one, so every posting is one local ACID transaction. Events flow outward via a transactional outbox to Kafka.
Each service owns its own database. The core is highlighted.
Building on Harrified Ledger, evaluating it for your stack, or need a commercial license? We'd love to hear from you.