Modern Treasury Ledgers

Judgement

What it is

Building block

What it does

A hosted double-entry ledger API for recording balances and transactions in fintech and marketplace products.

Adopt it when

A fintech or platform team needs an auditable ledger for customer balances and does not want to build one.

Watch out

Your core money records live in a vendor API, so pricing and migration matter.

Ready for

Production-ready

Runs as

Cloud service

What the license allows

Closed source: you use it under the maker's terms and cannot change or resell the code.

Judged on 2026-11-03 from the maker's description and Wikipedia. The license and age lines are worked out directly.

Open-source alternatives to Modern Treasury Ledgers

1. 1
   TigerBeetle tigerbeetle

   The financial transactions database designed for mission critical safety and performance.

   Building block Usable You are building a payments or ledger system that needs very high throughput and correctness.

   ★ 17k Apache-2.0 Zig Active, pushed 3 days ago
2. 2
   Fineract apache

   Apache Fineract

   Complete system Production-ready You run or build a lending, microfinance or savings business and need an open core banking back end.

   ★ 2.6k Apache-2.0 Java Active, pushed today
3. 3
   Django Ledger arrobalytics

   Django Ledger is a double entry accounting system and financial analysis engine built on the Django Web Framework.

   Building block Usable You are building a Django product that needs real accounting inside it.

   ★ 1.4k GPL-3.0 Python Active, pushed 4 days ago
4. 4
   Blnk blnkfinance

   Blnk is an open-source ledger & financial core for shipping fintech products fast.

   Building block Usable You are building wallets, payments or lending products and need a ledger rather than writing one.

   ★ 577 Apache-2.0 Go Active, pushed today
5. 5
   Pgledger pgr0ss

   A double entry ledger implementation in PostgreSQL

   Building block Usable Your app runs on Postgres and needs an internal money ledger without adding a separate service.

   ★ 495 MIT Go Active, pushed 12 days ago
6. 6
   Sequence hoophq

   Immutable, scalable, and easy to use ledger service.

   Building block Experimental You want to study or prototype a tamper-evident ledger service.

   ★ 512 Apache-2.0 Clojure Slowing, pushed 3 months ago
7. 7
   DoubleEntry envato

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   Building block Production-ready Your Rails app moves money between users or accounts and needs reliable balances.

   ★ 460 MIT Ruby Slowing, pushed 10 months ago
8. 8
   Medici flash-oss

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   Building block Usable Your Node.js app already uses MongoDB and needs an internal ledger for balances or wallets.

   ★ 361 MIT TypeScript Slowing, pushed 3 months ago
9. 9
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10. 10
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    ★ 100 MIT Java Quiet, pushed 3 years ago

Other commercial double-entry ledger engines

1. 1
   Fragment Fragment

   Fragment is the financial system for agents. Programmable money that bills, pays, and accounts for itself.

   Building block Usable A product team wants to define its ledger as code and query balances through GraphQL instead of building a ledger.

   Commercial

Under it

Every program, Modern Treasury Ledgers included, runs on a microchip.

How compilers were built, back to punched paper tape