sales

InvoicePlane: Simplify Invoicing

Name: InvoicePlane: Simplify Invoicing
Author: InvoicePlane

Get organized invoicing for your startup with InvoicePlane, used by founders like you

beginner⏱ 30 minutes💵 Free

3,133 stars871 forksPHPGuide quality 8/10 · reviewed Jun 30Updated 9/8/2026100% free · open source

What it is

Manages your invoices, clients, and payments, all in one self-hosted application.

Real use case example

"A founder of a small design agency uses InvoicePlane to manage all their clients, create invoices, and track payments. They can easily import existing clients, configure payment options, and export invoices to their accountant's spreadsheet. With this tool, they can stay organized and focus on designing."

Best insideSelf-hostedAny AI Client

When to use it

•You need to generate professional invoices with customizable templates
•You want to track client payments and outstanding balances in one place
•You require a scalable invoicing system that can grow with your startup

Ready-to-paste prompt

To generate an invoice for a client, go to `Invoices` > `Create Invoice`, select the client, add the invoice items, and click `Save Invoice`

Heads up: Make sure your web server meets the system requirements, including PHP 7.3 or higher and MySQL 5.6 or higher, to avoid compatibility issues during installation

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/invoiceplane && curl -fsSL https://workflowstacks.com/api/skills/invoiceplane/claude-skill -o ~/.claude/skills/invoiceplane/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How InvoicePlane: Simplify Invoicing works

Codeflow

Free to inspect

InvoicePlane: Simplify Invoicing is a very large PHP project (~67k lines across 433 code files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, Other license, no tests found.

Size

Very large codebase

~67k lines · 433 code files · days to read — use, don't read

Setup

Developer setup

A real software project. Use it via its install path; don't expect to read it all.

Runs on

PHP · Docker

No API keys detected

PHP 92%SCSS 6%JavaScript 2%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
AGENTS.md
The instructions the AI actually follows
3
index.php
Where the program starts running
4
composer.json
Dependencies and the commands it exposes
5
application/core/Admin_Controller.php
Inside application/core/ — the main logic begins here

What's in each folder

application/core/Core code — the actual logic13 files

application/modules/Sub-packages / plugins290 files

application/views/Frontend / UI30 files

application/helpers/Folder68 files

application/config/Configuration20 files

resources/Folder17 files

uploads/Folder17 files

application/libraries/Folder10 files

READMENo tests foundDocumentedCI checksDocker readyOther licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/invoiceplane && curl -fsSL https://workflowstacks.com/api/skills/invoiceplane/claude-skill -o ~/.claude/skills/invoiceplane/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

InvoicePlane

Language

PHP