Open Source Invoicing & Payment Tools using Slack
A curated collection of the best open source tools for creating invoices and processing payments. using Slack.
Streamline your business finances and operations
Stars
15,034Last commit
3 months agoLicense
AGPL-3.0
All-in-one tool for freelancers and small businesses to manage finances, track time, store files, and send invoices efficiently.
Open Source Alternative to:
Free online accounting for small businesses and freelancers
Stars
10,138Last commit
1 day agoLicense
Unknown
Self-hostable accounting software covering invoicing, expense tracking, cash flow, and client portals. Free to use, available in 50+ languages.
Open Source Alternative to:
Send invoices, accept payments, manage your business—all free
Stars
10,110Last commit
4 days agoLicense
Elastic-2.0
Free invoicing software for freelancers and small businesses. Create professional invoices, track expenses, accept online payments, and manage projects without hidden fees.
Open Source Alternative to:
Postiz – The All-in-One agentic social media scheduling tool
Postiz