Best Open-Source Accounting & Invoicing | open-source.storeAll categoriesAccounting & Invoicing
General ledgers, bookkeeping, small business accounting, and invoicing.
7 tools found 
Firefly III
Firefly III is a self-hosted personal finance manager with double-entry bookkeeping, rule-based automation, and strict local data privacy.
25.1kLinuxmacOSWindows2d ago AGPL-3.0Accounting & Invoicing
Midday
Midday replaces Harvest with live bank feeds, automated receipt matching, and client invoicing to give agencies real-time visibility into project margins.
15.1kLinuxmacOSWindows5mo ago AGPL-3.0Accounting & Invoicing
Akaunting
Akaunting is a self-hosted alternative to QuickBooks for small teams and agencies, offering multi-entity invoicing without per-seat fees.
10.3kLinuxmacOSWindows3d ago GPL-3.0Accounting & Invoicing
Crater
Crater is an open-source, self-hosted invoicing tool that replaces FreshBooks with fast, on-premise billing, mobile apps, and zero per-client fees.
8.4kLinuxmacOSWindows2y ago AGPL-3.0Accounting & Invoicing
GnuCash
GnuCash provides double-entry accounting for small teams and agencies, offering local ledger storage and invoicing without recurring software fees.
4.4kLinuxmacOSWindows2d ago GPL-3.0Accounting & Invoicing
Spliit
Spliit is an open-source, link-based Splitwise alternative for team expense sharing with zero seat fees, no account walls, and optional receipt scanning.
MITAccounting & Invoicing
Go & gRPC engineer · founder of EasyP
Go, gRPC and Protobuf done right, LLM agents in production, and the hard parts of shipping a first product.
GogRPCProtobufLLM agents
Money Manager Ex
Money Manager Ex is an open-source desktop tool for tracking cash flow and expenses locally using an encrypted SQLite database without cloud servers.
2.3kLinuxmacOSWindows2d ago GPL-2.0Accounting & Invoicing
Windows
3d ago
GPL-3.0Accounting & Invoicing
MITAccounting & Invoicing
Windows
5mo ago
AGPL-3.0Accounting & Invoicing