Freedom251 › Invoicing software
Simple Invoices
What Simple Invoices is
Simple Invoices is a free, open-source invoice management system that runs on the web and can be self-hosted. It creates, manages, and sends invoices, with itemised or total-style billing, customer and biller records, payment tracking, PDF generation, email delivery, and reports. Invoices can recur daily, weekly, monthly, or yearly, with generation started by a cron job or manually. The system supports 41+ languages, including a language setting for each invoice, and 40+ preset currencies plus custom currencies with locale-aware formatting. Listed payment gateways include Stripe, PayPal Commerce, Mollie, Authorize.net, eWay Rapid, Payments Gateway, Ko-fi, Coinbase Commerce, and Adyen. One installation can host multiple separate invoice workspaces, each with its own records, settings, users, themes, and email configuration. Installation is available through Docker or manually; supported databases are MySQL, MariaDB, PostgreSQL, and SQLite. It works in a browser on desktop, tablet, and phone without an app installation. Simple Invoices costs $0 and has no license fees or per-user charges.
Who it suits
Simple Invoices may suit people or organizations that want a free, self-hosted invoicing system with recurring billing, multiple currencies, or separate workspaces. Its browser-based design works across desktop, tablet, and phone.
What it does well
- Free with no license fees or per-user charges
- Supports 41+ languages and per-invoice language settings
- Recurring invoices can run daily, weekly, monthly, or yearly
- One installation supports multiple isolated workspaces
- Works in a browser without an app installation
What to know first
- Requires self-hosting or a web installation
- Recurring generation requires a cron job or manual trigger
- Payment gateway secrets require configuration for encryption
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Simple Invoices | GPLv3 · no license fees · no per-user charges | Free |
As simpleinvoices.org lists them, read 11 Oct 2026. The maker's own page has the final word.
Getting started
- Visit the Simple Invoices website.
- Choose a Docker deployment or a manual installation.
- Select a supported database: MySQL, MariaDB, PostgreSQL, or SQLite.
- Set up customer and biller records, then create and send invoices.
- Configure a cron job or use a manual trigger for recurring invoices.
Verdict
Simple Invoices offers broad invoicing and workspace features without license or per-user charges. Its self-hosted deployment and database choices make installation and configuration part of the decision.
Questions
Is Simple Invoices free?
Yes. Its plan is free, with no license fees or per-user charges.
Can I host Simple Invoices myself?
Yes. It is self-hosted and web-based, and can be installed with Docker or manually.
Which devices can access it?
It runs in a browser on desktop, tablet, and phone without an app installation.
Does it support recurring invoices and online payments?
Yes. Recurring invoices can be scheduled daily, weekly, monthly, or yearly. Listed payment gateways include Stripe, PayPal Commerce, Mollie, Authorize.net, eWay Rapid, Payments Gateway, Ko-fi, Coinbase Commerce, and Adyen.
Can one installation support multiple workspaces?
One installation can run multiple isolated invoice workspaces, each with its own records, settings, users, themes, and email configuration.
Which databases does it support?
It supports MySQL, MariaDB, PostgreSQL, and SQLite.
Facts from Simple Invoices's own pages
- Backups
- It provides SQL database backups and JSON exports for migrating data between supported database types. · simpleinvoices.org, 11 Oct 2026
- Client portal
- Yes · simpleinvoices.org, 19 Sept 2026
- Currencies
- It includes 40+ preset currencies plus custom currencies, with locale-aware formatting. · simpleinvoices.org, 11 Oct 2026
- Deployment and databases
- It can be installed with Docker or manually and supports MySQL, MariaDB, PostgreSQL, or SQLite. · simpleinvoices.org, 11 Oct 2026
- Founded
- 2005 · simpleinvoices.org, 28 Sept 2026
- Free plan
- Yes · simpleinvoices.org, 19 Sept 2026
- Intended users
- The maker describes multi-domain use cases for SaaS platforms, multi-brand organisations, and regional offices. · simpleinvoices.org, 11 Oct 2026
- Invoice features
- It supports itemised or total-style invoices, customer and biller records, payment tracking, recurring invoices, PDFs, email invoices, and reports. · simpleinvoices.org, 11 Oct 2026
- Languages
- It supports 41+ languages with per-invoice language settings. · simpleinvoices.org, 11 Oct 2026
- Mobile access
- It runs in a browser and its responsive design works on desktop, tablet, and phone without an app installation. · simpleinvoices.org, 11 Oct 2026
- Multi-currency invoicing
- Yes · simpleinvoices.org, 19 Sept 2026
- Multi-domain use
- One installation can run multiple isolated invoice workspaces, with each domain having its own records, settings, users, themes, and email configuration. · simpleinvoices.org, 11 Oct 2026
- Online payments
- Yes · simpleinvoices.org, 19 Sept 2026
- Payment integrations
- The listed online payment gateways include Stripe, PayPal Commerce, Mollie, Authorize.net, eWay Rapid, Payments Gateway, Ko-fi, Coinbase Commerce, and Adyen. · simpleinvoices.org, 11 Oct 2026
- Project history
- The maker's timeline lists 2005 as the year of the first release. · simpleinvoices.org, 11 Oct 2026
- Recurring billing
- Recurring invoices can be scheduled daily, weekly, monthly, or yearly, and generated by a cron job or manual trigger. · simpleinvoices.org, 11 Oct 2026
- Recurring invoices
- Yes · simpleinvoices.org, 19 Sept 2026
- Security configuration
- Payment gateway secrets can be encrypted using the SI_GATEWAY_SECRETS_KEY configuration value. · simpleinvoices.org, 11 Oct 2026
- Support and contributions
- The project welcomes community support and accepts bug reports, issues, pull requests, and discussions on its listed development platforms. · simpleinvoices.org, 11 Oct 2026
- What it does
- Simple Invoices is a free, open-source, self-hosted web-based invoice management system for creating, managing, and sending invoices. · simpleinvoices.org, 11 Oct 2026
Where Simple Invoices stands on Freedom251
- Invoicing software#19 of 83