Apps similar to okke include GnuCash, which is free and open source. Other options are Odoo, ERPNext, Summit Finance and Dolibarr. There's no shortage of Invoicing Software like okke, with more than 50 alternatives for the web, Windows, Mac, Linux and Android.
GnuCash is a versatile financial-accounting software designed for both personal and small-business use. With features like double-entry, scheduled transactions, and multi-currency support, it operates across various platforms, including Windows, Mac, and Linux, ensuring accuracy through professional principles.
United States
Open-source business application suite developed in Python, offering ERP, CRM, e-commerce, and project management, reducing software needs and synchronization costs with over 260 core modules.
Belgium
EU
ERPNext is a free and open-source integrated Enterprise Resource Planning (ERP) software developed by Frappé Technologies Pvt. Ltd. and is built on MariaDB database system using a Python based server-side framework.
United Kingdom
Summit is a modern, self-hostable invoicing and financial management application designed for freelancers, small businesses, and agencies. Create professional invoices, track expenses, generate financial reports, and more.
Indonesia
Dolibarr ERP & CRM is a modern and easy to use open-source web software package to manage your business (customers, invoices, orders, products, stocks, agenda, e-mailings, shipments...).
FranceEU
Free, open-source invoicing and billing platform providing PDF invoice generation, client payment options through 30+ gateways, multiple templates, company logo addition, team roles, time tracking, advanced customization through paid plans, and no installation required.
United States
Skrooge allows you to manage your personal finances, powered by KDE 4.x. Thanks to its many features, it is one of the most powerful way to enter, follow, and analyze your expenses.
FranceEU
AuriumAI is an AI-powered business platform with a master agent that manages invoicing, hiring, strategy, data analysis, compliance, and office tasks through one chat interface, acting as an autonomous operational team for smarter, faster business decisions.
Manager is free accounting software for Windows, Mac and Linux.
It features an intuitive and innovative user interface with modules such as cashbook, invoicing, receivables, payables, taxes and comprehensive financial reports.
The desktop edition is free while the cloud edition.
United Kingdom
Offers accounting software with payroll, bookkeeping, invoicing, app integration, and inventory tools. Four plans cater to businesses of all sizes. Automates reconciliation and shares with accountants seamlessly. Higher tiers add project tracking.
United States
From invoicing to expense tracking to accounting, Akaunting has all the tools you need to manage your money online, for free.
Türkiye
Comprehensive cloud accounting for small businesses and freelancers; save time billing clients by sending, tracking, and collecting payments swiftly. Generate professional invoices, manage expenses effortlessly, track project time seamlessly, and prepare for tax with ease.
Canada
