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What is Siwapp?

This web application, which is open-source, is specifically developed to streamline the creation and management of invoices in a user-friendly way. Although it specializes in one primary function, it does so with remarkable efficiency and effectiveness. Each feature is strategically arranged to enhance user experience and accessibility. Users can create invoices with distinct serial numbers and save drafts for future modifications. Moreover, it offers the capability to generate polished PDF versions of invoices, ensuring a professional touch. Invoices can also be set up for automatic generation on a predetermined schedule, making billing management even more convenient. This flexibility allows users to oversee their invoicing needs from any location with internet connectivity. In addition, the application supports the programmatic handling of customer information and invoices right within its interface, making management seamless. The active developer community surrounding this application is constantly working to improve its features, guaranteeing that users receive continuous advancements and enhancements. This collaborative approach not only fosters innovation but also ensures that the tool remains robust and adaptable to the evolving needs of its users. Ultimately, the ongoing contributions from the community play a crucial role in maintaining the application's relevance and effectiveness in the market.

What is Invora?

Invora is a self-hosted invoicing system for freelancers, agencies, trades and small businesses, sold as a one-time purchase with full source code rather than a monthly subscription. It handles estimates, invoices, branded PDFs, part-payments, receivables ageing, recurring billing that cannot double-draft the same cycle, clients with CSV import, tax rates and a reusable item catalogue. Outbound features run on your own credentials and ship switched off: emailed invoices and reminders through your SMTP server with a send log, and an .ics feed of due dates. Beyond the invoicing itself it includes a REST API with revocable keys, webhooks, an MCP endpoint for AI assistants, two-factor authentication, OIDC single sign-on, scheduled backups, an audit log and GDPR anonymisation. It runs on plain PHP 8 with MySQL or SQLite on ordinary shared hosting, needs no framework or build step, and never phones home.

Media

Media

Integrations Supported

Integrations Supported

ChatGPT
Claude
n8n

API Availability

API Availability

Has API

Pricing Information

Pricing not provided
Free Version

Pricing Information

$99 one-time
One-time purchase. Single licence $99 - one domain you own or operate, client work included. Extended licence $229 - as many domains as you own or operate, plus one installation handed over per client project. Full source code included. No subscriptions, no per-user fees, no cut of what you bill.

Supported Platforms

Windows

Supported Platforms

Windows
Mac
On-Prem
Linux

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Not specified

Training Options

Documentation Hub

Company Facts

Organization Name

Siwapp

Company Location

Germany

Company Website

www.siwapp.org

Company Facts

Organization Name

Ownware

Date Founded

2026

Company Location

Slovakia

Company Website

ownware.io/p/invora

Categories and Features

Billing and Invoicing

Billing Portal
Contact Database
Dunning Management
Online Invoicing
Payment Processing
Tax Calculator

Invoice Generators

Not specified

Categories and Features

Billing and Invoicing

Contact Database
Customizable Invoices
Invoice History
Multi-Currency
Online Invoicing
Recurring/Subscription Billing
Tax Calculator

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