Medici

Judgement

What it is

Building block

What it does

A Node.js library that implements double-entry accounting journals and balances on top of MongoDB and Mongoose.

Adopt it when

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

Watch out

Tied to MongoDB and Mongoose, and maintained by a small team.

Ready for

Usable

Runs as

Library

Built with

TypeScript, Node.js, MongoDB and Mongoose

How established

Established: started 13 years ago, latest release v7.2.0.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Medici → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

Open-source alternatives to Medici

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

   A double-entry accounting system for Ruby applications.

   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
   Ledger abivia

   General Ledger and Journal Accounting Package and API for Laravel

   Building block Experimental You need a general ledger inside a Laravel app and can maintain the code yourself.

   ★ 132 MIT PHP Quiet, pushed 3 years ago

Commercial double-entry ledger engines

1. 1
   Modern Treasury Ledgers Modern Treasury

   Track every transaction in real-time with double-entry accounting. Built for teams that need perfect accuracy and auditability.

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

   Commercial
2. 2
   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