Open Source Business Software

OpenProject

Open source project management for teams

Stars
14,867
Forks
3,197
Last commit
5 hours ago

Powerful classic, agile or hybrid project management software with a focus on data privacy and security

Open Source Alternative to:

Linear

Docuseal

Open source document signing made simple

Stars
11,749
Forks
1,019
Last commit
7 days ago

DocuSeal is an open source e-signature platform that provides fast, easy document signing with developer-friendly API integration.

Open Source Alternative to:

DocuSign

Element

Secure, decentralized messaging for teams and individuals

Stars
13,002
Forks
2,567
Last commit
9 hours ago

Open-source platform for encrypted communication, file sharing, and collaboration based on the Matrix protocol.

Open Source Alternative to:

Discord

Seafile

Self-hosted file sync with AI-powered organization

Stars
14,606
Forks
1,638
Last commit
4 days ago

Open source file sync and sharing platform with custom properties, AI automation, collaborative editing, and enterprise-grade security for teams.

Open Source Alternative to:

Google Drive

Sink

Simple, speedy, and secure link shortener with analytics

Stars
6,536
Forks
4,465
Last commit
3 days ago

A serverless link shortener that runs entirely on Cloudflare, offering URL compression, analytics, and customizable slugs.

Open Source Alternative to:

Bitly

Gumroad

Your all-in-one marketplace for digital creators and products

Stars
8,928
Forks
1,865
Last commit
9 hours ago

A digital marketplace platform where creators can sell digital products, from courses to software, with built-in payment processing and content delivery.

Open Source Alternative to:

Stripe

Planka

Elegant open source project tracking made simple

Stars
11,879
Forks
1,242
Last commit
2 days ago

Open source project management tool with elegant design. Track projects, manage tasks, and collaborate with your team using this self-hosted alternative.

Open Source Alternative to:

Monday

Alokai

Build and deploy scalable storefronts with ease

Stars
10,927
Forks
2,086
Last commit
5 days ago

A comprehensive Frontend as a Service solution that helps developers create, deploy and manage enterprise ecommerce storefronts with ready integrations and cloud infrastructure.

Open Source Alternative to:

Shopify

Fluxer

Open source messaging with privacy and community focus

Stars
8,309
Forks
465
Last commit
11 days ago

Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.

Open Source Alternative to:

Discord

Akaunting

Free, open-source accounting for small businesses

Stars
9,748
Forks
2,895
Last commit
5 days ago

Cloud-based accounting software offering invoicing, expense tracking, and financial reporting for entrepreneurs and small businesses.

Open Source Alternative to:

Polar

Modern payment infrastructure for digital products and SaaS

Stars
9,673
Forks
694
Last commit
1 day ago

Comprehensive payment solution with built-in tax handling, automated benefits, and seamless integrations for digital product and SaaS businesses.

Open Source Alternative to:

Stripe

Kutt

Simplify your links with this free, modern URL shortener

Stars
10,709
Forks
1,434
Last commit
2 months ago

Kutt offers a free and open-source solution for shortening URLs, complete with custom domains and detailed analytics.

Open Source Alternative to:

Bitly

Mautic

Open source marketing automation for everyone

Stars
9,476
Forks
3,239
Last commit
23 hours ago

Mautic is a free and open source marketing automation platform that helps businesses manage leads, create campaigns, and analyze results.

Open Source Alternative to:

HubSpot

Papermark

Open-source document sharing with powerful analytics

Stars
8,181
Forks
1,188
Last commit
3 days ago

Secure, customizable platform for sharing documents and tracking engagement. Perfect for sales teams, marketers, and businesses.

Open Source Alternative to:

DocSend

HeyForm

Create powerful forms with ease and flexibility

Stars
8,690
Forks
671
Last commit
1 month ago

A versatile form builder for crafting custom surveys, quizzes, and data collection tools with advanced features and integrations.

Open Source Alternative to:

Fizzy

Modern kanban that's fast, fun, and refreshingly simple

Stars
7,610
Forks
1,088
Last commit
1 day ago

Track issues, ideas, and projects with a modern kanban board that's fast and straightforward. Free for 1000 cards, then $20/month for unlimited use.

Open Source Alternative to:

Monday

Invoice Ninja

Free invoicing software for small businesses and freelancers

Stars
9,680
Forks
2,625
Last commit
12 hours ago

Invoice Ninja offers powerful invoicing, expense tracking, and project management tools to help you get paid faster.

Open Source Alternative to:

Lago

Transform complex usage data into accurate, real-time billing

Stars
9,545
Forks
586
Last commit
3 days ago

Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.

Open Source Alternative to:

Stripe Billing

Leantime

Goal-driven project management for all brains

Stars
9,522
Forks
936
Last commit
4 days ago

Open-source software designed to streamline tasks, boost productivity, and enhance collaboration for teams of all types, including those with ADHD and neurodiversity.

Open Source Alternative to:

Monday

Vendure

Flexible e-commerce for modern businesses

Stars
8,056
Forks
1,369
Last commit
4 days ago

A headless, API-first e-commerce framework built on Node.js with TypeScript, offering customization and scalability for online stores.

Open Source Alternative to:

WooCommerce

Expensify

Simplify expense management for businesses of all sizes

Stars
4,829
Forks
3,716
Last commit
5 hours ago

Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.

OpenSign

Secure, customizable e-signatures for modern businesses

Stars
6,206
Forks
673
Last commit
4 days ago

A powerful, open-source e-signature solution offering customization, integration, and enhanced security for businesses of all sizes.

Open Source Alternative to:

DocuSign

Crater

AI-powered embedded AR/AP automation for platforms

Stars
8,280
Forks
1,683
Last commit
2 years ago

Crater offers AI-driven invoicing workflows, payments, and working capital tools to enhance your platform with minimal technical effort.

Open Source Alternative to:

Fonoster

Open-source cloud communications platform for developers

Stars
7,773
Forks
499
Last commit
12 days ago

Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.

Open Source Alternative to:

Twilio

Your Next Store (YNS)

Launch Your Store in Minutes, No Code Needed

Stars
5,392
Forks
655
Last commit
6 days ago

Fast, modern e-commerce with instant setup and full customization. Powered by Stripe for seamless transactions.

Open Source Alternative to:

Shopify

CryptPad

Secure collaboration with end-to-end encryption

Stars
7,513
Forks
810
Last commit
3 days ago

Open-source collaboration suite offering encrypted document editing, file sharing, and team workspaces with complete privacy protection.

Open Source Alternative to:

ONLYOFFICE Docs

Complete office suite for documents, spreadsheets & more

Stars
6,441
Forks
1,269
Last commit
1 month ago

Open-source online editor for documents, spreadsheets, presentations, and PDFs. Features real-time collaboration, AI integration, and accessibility tools.

Open Source Alternative to:

Campfire

Self-hosted group chat without recurring subscription fees

Stars
4,280
Forks
718
Last commit
7 days ago

Install your own group chat system with @mentions, DMs, and mobile support. One-time purchase, no monthly fees. Includes full source code for customization.

Open Source Alternative to:

Plunk

The open-source, affordable email platform

Stars
4,979
Forks
328
Last commit
1 day ago

Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.

Open Source Alternative to:

Resend

Colanode

Self-hosted workspace combining chat, docs, and files

Stars
4,759
Forks
290
Last commit
17 days ago

Open-source collaboration platform combining real-time chat, document editing, file sharing, and project management. Self-host for complete control.

Open Source Alternative to:

Notion

Workadventure

Virtual office platform for engaging remote collaboration

Stars
5,396
Forks
853
Last commit
20 hours ago

Create customizable virtual workspaces for remote teams to interact naturally, host events, and collaborate through spontaneous conversations and scheduled meetings.

Open Source Alternative to:

Solidus

Flexible eCommerce platform for brands that stand out

Stars
5,287
Forks
1,369
Last commit
3 days ago

Open-source eCommerce platform offering customization, scalability and enterprise-grade features for brands of all sizes

Open Source Alternative to:

Shopify

Kan

Open source kanban boards with unlimited everything

Stars
4,647
Forks
319
Last commit
2 days ago

Free kanban project management with unlimited boards, lists, and cards. Import Trello boards, collaborate with teams, and self-host for complete control.

Open Source Alternative to:

Monday

Zammad

Powerful helpdesk solution for streamlined customer service

Stars
5,531
Forks
969
Last commit
5 hours ago

Zammad is an open-source helpdesk software that centralizes customer communications and helps deliver great service experiences efficiently.

Open Source Alternative to:

Zendesk

Papra

Organize and secure your documents in one central hub

Stars
4,265
Forks
195
Last commit
2 days ago

A document management platform that helps you archive, organize, and search files with email ingestion, tagging capabilities, and powerful search functionality.

Open Source Alternative to:

Frappe Books

Modern desktop accounting made simple and free

Stars
4,564
Forks
1,059
Last commit
10 days ago

A user-friendly desktop accounting software that helps businesses manage invoices, track expenses, and handle bookkeeping with a modern interface.

Open Source Alternative to:

useSend

Pay per email sent, not for contact storage

Stars
4,135
Forks
360
Last commit
8 days ago

Open source email platform for transactional and marketing emails. Self-host or use cloud service with transparent pricing - pay only for emails sent.

Open Source Alternative to:

Resend

Easy!Appointments

Free open-source appointment booking for any business

Stars
4,152
Forks
1,517
Last commit
5 days ago

Self-hosted appointment scheduling solution with Google Calendar sync, customizable workflows, and no monthly fees. Perfect for healthcare, salons, and service businesses.

Open Source Alternative to:

Calendly

Hi.Events

Effortlessly manage events and sell tickets online

Stars
3,673
Forks
622
Last commit
2 days ago

Hi.Events is a comprehensive platform for event management and online ticket sales, offering features like QR code check-in, custom ticket types, and embeddable widgets.

Open Source Alternative to:

Eventbrite

Rallly

Effortless group scheduling for seamless collaboration

Stars
5,057
Forks
508
Last commit
2 days ago

A user-friendly, open-source tool for coordinating events and meetings without the hassle of back-and-forth emails or messages.

Open Source Alternative to:

Calendly

Postal

Robust, scalable email delivery for your applications

Stars
16,458
Forks
1,228
Last commit
4 days ago

Self-hosted email delivery platform with powerful features for transactional and bulk emails, offering full control and customization.

Open Source Alternative to:

Resend

Formbricks

Privacy-first surveys that respect your data ownership

Stars
12,099
Forks
2,210
Last commit
6 hours ago

Open source experience management platform for gathering user feedback on websites and apps. GDPR-compliant with self-hosting options and seamless integrations.

Open Source Alternative to:

OpenProject

Open source project management for teams

Stars
14,867
Forks
3,197
Last commit
5 hours ago

Powerful classic, agile or hybrid project management software with a focus on data privacy and security

Open Source Alternative to:

Linear

Docuseal

Open source document signing made simple

Stars
11,749
Forks
1,019
Last commit
7 days ago

DocuSeal is an open source e-signature platform that provides fast, easy document signing with developer-friendly API integration.

Open Source Alternative to:

DocuSign

Element

Secure, decentralized messaging for teams and individuals

Stars
13,002
Forks
2,567
Last commit
9 hours ago

Open-source platform for encrypted communication, file sharing, and collaboration based on the Matrix protocol.

Open Source Alternative to:

Discord

Seafile

Self-hosted file sync with AI-powered organization

Stars
14,606
Forks
1,638
Last commit
4 days ago

Open source file sync and sharing platform with custom properties, AI automation, collaborative editing, and enterprise-grade security for teams.

Open Source Alternative to:

Google Drive

Sink

Simple, speedy, and secure link shortener with analytics

Stars
6,536
Forks
4,465
Last commit
3 days ago

A serverless link shortener that runs entirely on Cloudflare, offering URL compression, analytics, and customizable slugs.

Open Source Alternative to:

Bitly

Gumroad

Your all-in-one marketplace for digital creators and products

Stars
8,928
Forks
1,865
Last commit
9 hours ago

A digital marketplace platform where creators can sell digital products, from courses to software, with built-in payment processing and content delivery.

Open Source Alternative to:

Stripe

Planka

Elegant open source project tracking made simple

Stars
11,879
Forks
1,242
Last commit
2 days ago

Open source project management tool with elegant design. Track projects, manage tasks, and collaborate with your team using this self-hosted alternative.

Open Source Alternative to:

Monday

Alokai

Build and deploy scalable storefronts with ease

Stars
10,927
Forks
2,086
Last commit
5 days ago

A comprehensive Frontend as a Service solution that helps developers create, deploy and manage enterprise ecommerce storefronts with ready integrations and cloud infrastructure.

Open Source Alternative to:

Shopify

Fluxer

Open source messaging with privacy and community focus

Stars
8,309
Forks
465
Last commit
11 days ago

Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.

Open Source Alternative to:

Discord

Akaunting

Free, open-source accounting for small businesses

Stars
9,748
Forks
2,895
Last commit
5 days ago

Cloud-based accounting software offering invoicing, expense tracking, and financial reporting for entrepreneurs and small businesses.

Open Source Alternative to:

Polar

Modern payment infrastructure for digital products and SaaS

Stars
9,673
Forks
694
Last commit
1 day ago

Comprehensive payment solution with built-in tax handling, automated benefits, and seamless integrations for digital product and SaaS businesses.

Open Source Alternative to:

Stripe

Kutt

Simplify your links with this free, modern URL shortener

Stars
10,709
Forks
1,434
Last commit
2 months ago

Kutt offers a free and open-source solution for shortening URLs, complete with custom domains and detailed analytics.

Open Source Alternative to:

Bitly

Mautic

Open source marketing automation for everyone

Stars
9,476
Forks
3,239
Last commit
23 hours ago

Mautic is a free and open source marketing automation platform that helps businesses manage leads, create campaigns, and analyze results.

Open Source Alternative to:

HubSpot

Papermark

Open-source document sharing with powerful analytics

Stars
8,181
Forks
1,188
Last commit
3 days ago

Secure, customizable platform for sharing documents and tracking engagement. Perfect for sales teams, marketers, and businesses.

Open Source Alternative to:

DocSend

HeyForm

Create powerful forms with ease and flexibility

Stars
8,690
Forks
671
Last commit
1 month ago

A versatile form builder for crafting custom surveys, quizzes, and data collection tools with advanced features and integrations.

Open Source Alternative to:

Fizzy

Modern kanban that's fast, fun, and refreshingly simple

Stars
7,610
Forks
1,088
Last commit
1 day ago

Track issues, ideas, and projects with a modern kanban board that's fast and straightforward. Free for 1000 cards, then $20/month for unlimited use.

Open Source Alternative to:

Monday

Invoice Ninja

Free invoicing software for small businesses and freelancers

Stars
9,680
Forks
2,625
Last commit
12 hours ago

Invoice Ninja offers powerful invoicing, expense tracking, and project management tools to help you get paid faster.

Open Source Alternative to:

Lago

Transform complex usage data into accurate, real-time billing

Stars
9,545
Forks
586
Last commit
3 days ago

Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.

Open Source Alternative to:

Stripe Billing

Leantime

Goal-driven project management for all brains

Stars
9,522
Forks
936
Last commit
4 days ago

Open-source software designed to streamline tasks, boost productivity, and enhance collaboration for teams of all types, including those with ADHD and neurodiversity.

Open Source Alternative to:

Monday

Vendure

Flexible e-commerce for modern businesses

Stars
8,056
Forks
1,369
Last commit
4 days ago

A headless, API-first e-commerce framework built on Node.js with TypeScript, offering customization and scalability for online stores.

Open Source Alternative to:

WooCommerce

Expensify

Simplify expense management for businesses of all sizes

Stars
4,829
Forks
3,716
Last commit
5 hours ago

Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.

OpenSign

Secure, customizable e-signatures for modern businesses

Stars
6,206
Forks
673
Last commit
4 days ago

A powerful, open-source e-signature solution offering customization, integration, and enhanced security for businesses of all sizes.

Open Source Alternative to:

DocuSign

Crater

AI-powered embedded AR/AP automation for platforms

Stars
8,280
Forks
1,683
Last commit
2 years ago

Crater offers AI-driven invoicing workflows, payments, and working capital tools to enhance your platform with minimal technical effort.

Open Source Alternative to:

Fonoster

Open-source cloud communications platform for developers

Stars
7,773
Forks
499
Last commit
12 days ago

Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.

Open Source Alternative to:

Twilio

Your Next Store (YNS)

Launch Your Store in Minutes, No Code Needed

Stars
5,392
Forks
655
Last commit
6 days ago

Fast, modern e-commerce with instant setup and full customization. Powered by Stripe for seamless transactions.

Open Source Alternative to:

Shopify

CryptPad

Secure collaboration with end-to-end encryption

Stars
7,513
Forks
810
Last commit
3 days ago

Open-source collaboration suite offering encrypted document editing, file sharing, and team workspaces with complete privacy protection.

Open Source Alternative to:

ONLYOFFICE Docs

Complete office suite for documents, spreadsheets & more

Stars
6,441
Forks
1,269
Last commit
1 month ago

Open-source online editor for documents, spreadsheets, presentations, and PDFs. Features real-time collaboration, AI integration, and accessibility tools.

Open Source Alternative to:

Campfire

Self-hosted group chat without recurring subscription fees

Stars
4,280
Forks
718
Last commit
7 days ago

Install your own group chat system with @mentions, DMs, and mobile support. One-time purchase, no monthly fees. Includes full source code for customization.

Open Source Alternative to:

Plunk

The open-source, affordable email platform

Stars
4,979
Forks
328
Last commit
1 day ago

Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.

Open Source Alternative to:

Resend

Colanode

Self-hosted workspace combining chat, docs, and files

Stars
4,759
Forks
290
Last commit
17 days ago

Open-source collaboration platform combining real-time chat, document editing, file sharing, and project management. Self-host for complete control.

Open Source Alternative to:

Notion

Workadventure

Virtual office platform for engaging remote collaboration

Stars
5,396
Forks
853
Last commit
20 hours ago

Create customizable virtual workspaces for remote teams to interact naturally, host events, and collaborate through spontaneous conversations and scheduled meetings.

Open Source Alternative to:

Solidus

Flexible eCommerce platform for brands that stand out

Stars
5,287
Forks
1,369
Last commit
3 days ago

Open-source eCommerce platform offering customization, scalability and enterprise-grade features for brands of all sizes

Open Source Alternative to:

Shopify

Kan

Open source kanban boards with unlimited everything

Stars
4,647
Forks
319
Last commit
2 days ago

Free kanban project management with unlimited boards, lists, and cards. Import Trello boards, collaborate with teams, and self-host for complete control.

Open Source Alternative to:

Monday

Zammad

Powerful helpdesk solution for streamlined customer service

Stars
5,531
Forks
969
Last commit
5 hours ago

Zammad is an open-source helpdesk software that centralizes customer communications and helps deliver great service experiences efficiently.

Open Source Alternative to:

Zendesk

Papra

Organize and secure your documents in one central hub

Stars
4,265
Forks
195
Last commit
2 days ago

A document management platform that helps you archive, organize, and search files with email ingestion, tagging capabilities, and powerful search functionality.

Open Source Alternative to:

Frappe Books

Modern desktop accounting made simple and free

Stars
4,564
Forks
1,059
Last commit
10 days ago

A user-friendly desktop accounting software that helps businesses manage invoices, track expenses, and handle bookkeeping with a modern interface.

Open Source Alternative to: