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Open Source Business Software

A curated collection of the best open source software that runs a business day to day, covering CRM and sales, finance and accounting, HR, legal, project management, e-commerce, and customer support.

See also:CRM & SalesERP & OperationsHuman Resources (HR)Marketing & Customer EngagementCustomer Support & SuccessE-commerce PlatformsCollaboration & CommunicationScheduling & Event ManagementDocument Management & E-SignaturesForms & SurveysCompliance & Risk ManagementLegalFinance & AccountingProject & Work Management
Favicon of c15t

c15t

Build privacy-compliant cookie banners with full control

  • Stars

    1,857

  • Last commit

    3 days ago

  • License

    Apache-2.0
Open source consent management framework for modern web apps. Framework-agnostic, fully customizable, and performance-first with no vendor lock-in.

Open Source Alternative to:

Favicon of Termly
Termly
Favicon of OpenMeter

OpenMeter

Real-time usage metering and billing for AI companies

  • Stars

    2,213

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Open source billing platform that turns events into revenue with real-time metering, usage limits, and flexible pricing. Integrates with Stripe, CRMs, and payment providers.

Open Source Alternative to:

Favicon of Stripe Billing
Stripe Billing
Favicon of Open Mercato

Open Mercato

AI-native CRM/ERP foundation with 80% already built

  • Stars

    1,648

  • Last commit

    11 hours ago

  • License

    MIT
A modular CRM/ERP framework built on Next.js and TypeScript that encodes hundreds of architectural decisions so dev teams can ship production features in days, not months.

Open Source Alternative to:

Favicon of SAP
SAP
Favicon of Horilla

Horilla

Comprehensive open-source HR management solution

  • Stars

    1,331

  • Last commit

    14 hours ago

  • License

    LGPL-2.1
Horilla is a free, open-source HRMS that streamlines HR processes, from recruitment to offboarding, with customizable modules.

Open Source Alternative to:

Favicon of Workable
Workable
Favicon of Keila

Keila

Open-source email marketing for the privacy-conscious

  • Stars

    2,189

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Self-hosted newsletter platform with powerful features, data protection, and full control over your mailing lists and campaigns.

Open Source Alternative to:

Favicon of Substack
Substack
Favicon of Atomic CRM

Atomic CRM

Open-source CRM toolkit for personalized solutions

  • Stars

    1,201

  • Last commit

    6 days ago

  • License

    MIT
Build a customizable CRM that matches your company's vision, designed for developers and loved by end users.

Open Source Alternative to:

Favicon of Attio
Attio
Favicon of Kanri

Kanri

Simplify your workflow with offline Kanban boards

  • Stars

    2,001

  • Last commit

    5 days ago

  • License

    GPL-3.0
Kanri is a free, open-source personal Kanban app that works offline, offering a modern and simple experience while respecting your privacy.

Open Source Alternative to:

Favicon of Jira
Jira
Favicon of Sync-in

Sync-in

Open-source file storage with complete data sovereignty

  • Stars

    1,640

  • Last commit

    13 days ago

  • License

    AGPL-3.0
Secure, open-source platform for file storage, sharing, and collaboration. Host your data on your own infrastructure with full control and transparency.

Open Source Alternative to:

Favicon of Google Drive
Google Drive
Favicon of Relaticle

Relaticle

Modern open-source CRM that grows with your business

  • Stars

    1,517

  • Last commit

    10 hours ago

  • License

    AGPL-3.0
Transform customer relationships with this intuitive open-source CRM. Features task management, sales pipeline tracking, and customizable data models.

Open Source Alternative to:

Favicon of Attio
Attio
Favicon of Flowglad

Flowglad

AI
Cross-system automation and knowledge base for accounting firms

  • Stars

    1,718

  • Last commit

    3 months ago

  • License

    Unknown
Connects client data across tools, automates recurring accounting workflows, and maintains a self-updating knowledge base with human approval controls.
Favicon of Wire

Wire

Secure collaboration platform with end-to-end encryption

  • Stars

    2,542

  • Last commit

    8 months ago

  • License

    GPL-3.0
A comprehensive collaboration platform offering end-to-end encrypted messaging, file sharing, and video calls with enterprise-grade security and compliance features.

Open Source Alternative to:

Favicon of Discord
Discord
Favicon of Mezon

Mezon

Create custom spaces to chat, game, and connect globally

  • Stars

    1,562

  • Last commit

    11 hours ago

  • License

    MIT
Build your own community space for gaming, chatting, and hanging out with friends worldwide. Customize your environment for the perfect social experience.

Open Source Alternative to:

Favicon of Discord
Discord
Favicon of Sendportal

Sendportal

Self-hosted email marketing with unlimited everything

  • Stars

    2,159

  • Last commit

    2 years ago

  • License

    MIT
Open-source email marketing platform offering unlimited subscribers, campaigns, and workspaces. Self-hosted solution with powerful API and beautiful interface.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of UnInbox

UnInbox

Transform team email into efficient collaborative workflows

  • Stars

    1,754

  • Last commit

    6 months ago

  • License

    AGPL-3.0
Streamline team communication with shared inboxes, unlimited email addresses, and customizable workflows. Perfect for modern businesses seeking organized email management.

Open Source Alternative to:

Favicon of Gmail
Gmail
Favicon of Meteroid

Meteroid

Flexible billing infrastructure for modern SaaS

  • Stars

    1,218

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
Open-source pricing and billing platform that helps SaaS companies launch, test, and scale complex billing models with ease. Features metering, invoicing, and real-time data.

Open Source Alternative to:

Favicon of Stripe Billing
Stripe Billing
Favicon of LogChimp

LogChimp

Open-source feedback management for product teams

  • Stars

    1,119

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Collect, organize, and prioritize user feedback to build better products. Self-hosted solution for seamless feature request management.

Open Source Alternative to:

Favicon of Featurebase
Featurebase
Favicon of Taiga

Taiga

Agile project management for cross-functional teams

  • Stars

    847

  • Last commit

    16 days ago

  • License

    MPL-2.0
Self-hostable agile project management tool with Kanban and Scrum boards, sprint planning, issue tracking, and reporting for teams of any size.

Open Source Alternative to:

Favicon of Jira
Jira
Favicon of Freeter

Freeter

Your personal workspace organizer for maximum productivity

  • Stars

    1,022

  • Last commit

    3 months ago

  • License

    GPL-3.0
Organize projects, tasks, and resources in customizable workspaces. Boost productivity with a unified interface for all your work.

Open Source Alternative to:

Favicon of Monday
Monday
Favicon of Linky

Linky

A delightfully rich and dynamic link-in-bio.

  • Stars

    796

  • Last commit

    16 days ago

  • License

    MIT
Build a dynamic link-in-bio page with a drag-and-drop editor. Integrate platforms to showcase live content and connect with your audience.

Open Source Alternative to:

Favicon of LinkTree
LinkTree
Favicon of Cossistant

Cossistant

AI
AI-native support infrastructure for modern SaaS

  • Stars

    714

  • Last commit

    15 days ago

  • License

    AGPL-3.0
Open-source support platform combining AI and human agents. React components with shadcn/ui design philosophy, styled with Tailwind CSS for NextJS apps.

Open Source Alternative to:

Favicon of Zendesk
Zendesk
Favicon of Kanba

Kanba

Beautiful Kanban boards with seamless payment integration

  • Stars

    644

  • Last commit

    12 days ago

  • License

    MIT
Organize projects with intuitive Kanban boards, powered by Supabase backend and Stripe payment processing for complete project management workflow.

Open Source Alternative to:

Favicon of Jira
Jira
Favicon of TryPost

TryPost

Schedule posts to every major social network, self-hosted

  • Stars

    524

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
Plan, schedule, and auto-publish social media content across 10+ networks with a visual calendar, AI captions, team approvals, and self-hosting support.

Open Source Alternative to:

Favicon of Buffer
Buffer
Favicon of Contentport

Contentport

Your content engine for growing on Twitter at scale

  • Stars

    763

  • Last commit

    8 months ago

  • License

    AGPL-3.0
Create, schedule & manage Twitter content at scale with AI assistance, beautiful visuals, and multi-account support. Perfect for busy founders.

Open Source Alternative to:

Favicon of Post Bridge
Post Bridge
Favicon of Ethora

Ethora

Messaging SDK with AI agents for web, iOS, and Android

  • Stars

    542

  • Last commit

    3 days ago

  • License

    Apache-2.0
Build branded chat apps with AI agents, group messaging, document exchange, and digital wallets using React and React Native components.

Open Source Alternative to:

Favicon of Stream
Stream
Favicon of Operately

Operately

Open source company management for high-performance startups

  • Stars

    543

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Operately is an open source platform that centralizes projects, goals, and processes, helping startups run efficiently without a COO.

Open Source Alternative to:

Favicon of Linear
Linear
Favicon of Ever Teams

Ever Teams

Real-time work and project management platform

  • Stars

    544

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Ever Teams offers an all-in-one solution for work management, time tracking, and team collaboration with integrations for popular tools.

Open Source Alternative to:

Favicon of Linear
Linear
Favicon of Formance

Formance

Open source financial infrastructure for modern businesses

  • Stars

    518

  • Last commit

    13 hours ago

  • License

    MIT
Build custom financial flows and integrate with any provider using Formance's agnostic platform

Open Source Alternative to:

Favicon of Stripe Billing
Stripe Billing
Favicon of Shelve

Shelve

Simplify project management for developers

  • Stars

    446

  • Last commit

    2 days ago

  • License

    Apache-2.0
Shelve is a comprehensive project management tool designed to streamline workflows and enhance collaboration for developers and teams.

Open Source Alternative to:

Favicon of Keeper
Keeper
Favicon of ClearFlask

ClearFlask

Open-source ideation tool for product feedback management

  • Stars

    448

  • Last commit

    14 days ago

  • License

    Apache-2.0
ClearFlask is an open-source platform for collecting, analyzing, and acting on customer feedback to drive product development.

Open Source Alternative to:

Favicon of Featurebase
Featurebase
Favicon of dDocs

dDocs

End-to-end encrypted collaborative document editor

  • Stars

    393

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
Write, organize, and collaborate in real-time with complete privacy and security. This app is an open-source, online/offline compatible, and AI-free alternative to Google Docs.

Open Source Alternative to:

Favicon of Microsoft Word
Microsoft Word
Favicon of Ikiform

Ikiform

Create stunning forms with AI-powered builder and analytics

  • Stars

    356

  • Last commit

    3 months ago

  • License

    MIT
Build beautiful, interactive forms with AI assistance. Open-source alternative to Google Forms with unlimited submissions, advanced analytics, and seamless integrations.

Open Source Alternative to:

Favicon of Google Forms
Google Forms
Favicon of Lua.sh

Lua.sh

Professional link management for modern teams

  • Stars

    338

  • Last commit

    4 months ago

  • License

    AGPL-3.0
Open-source platform for creating shortened URLs with advanced analytics, custom domains, and API integration for marketing and development teams.

Open Source Alternative to:

Favicon of TinyURL
TinyURL
Favicon of ShipShipShip

ShipShipShip

Open-source changelog & roadmap platform for teams

  • Stars

    296

  • Last commit

    6 months ago

  • License

    Apache-2.0
Self-hostable changelog and roadmap platform with community voting, automated newsletters, and kanban boards. Deploy with Docker in minutes.

Open Source Alternative to:

Favicon of Featurebase
Featurebase
Favicon of UniBee

UniBee

Cut billing costs with open-source subscription management

  • Stars

    229

  • Last commit

    6 months ago

  • License

    AGPL-3.0
Replace expensive billing solutions with open-source software. Automate subscriptions, accept multiple payments including crypto, and gain real-time revenue insights.

Open Source Alternative to:

Favicon of Stripe Billing
Stripe Billing
Favicon of Wraft

Wraft

Scale document creation with automated workflows

  • Stars

    161

  • Last commit

    2 months ago

  • License

    AGPL-3.0
Complete document lifecycle management with automated generation, approval workflows, e-signatures, and branded templates. Create professional documents at scale.

Open Source Alternative to:

Favicon of DocuSign
DocuSign
Favicon of Orgnise

Orgnise

Effortlessly manage tasks, projects, and teams

  • Stars

    246

  • Last commit

    1 year ago

  • License

    AGPL-3.0
A versatile project management platform that combines task organization, team collaboration, and workflow automation in one intuitive interface.

Open Source Alternative to:

Favicon of Notion
Notion
Favicon of OpenPolicy

OpenPolicy

Generate legal policies directly from TypeScript code

  • Stars

    160

  • Last commit

    16 days ago

  • License

    Apache-2.0
Open-source policy-as-code framework that lets developers create privacy policies, terms of service, and legal agreements using TypeScript with built-in GDPR/CCPA compliance.

Open Source Alternative to:

Favicon of Termly
Termly
Favicon of Twake Chat

Twake Chat

Secure open source messaging for professional teams

  • Stars

    162

  • Last commit

    22 hours ago

  • License

    AGPL-3.0
Free Matrix-based messenger with end-to-end encryption, multi-platform bridges, and on-premise deployment. Connect across 30+ networks securely.

Open Source Alternative to:

Favicon of Slack
Slack
Favicon of SAMA

SAMA

Secure, scalable chat server for modern applications

  • Stars

    159

  • Last commit

    14 hours ago

  • License

    GPL-3.0
Open source chat server with end-to-end encryption, clustering support, and comprehensive messaging features for building real-time communication apps

Open Source Alternative to:

Favicon of Discord
Discord
Favicon of Formizee

Formizee

Create and manage forms with ease

  • Stars

    183

  • Last commit

    1 year ago

  • License

    Apache-2.0
Formizee is an open-source platform for designing, building, and analyzing forms, offering an affordable all-in-one solution

Open Source Alternative to:

Favicon of Google Forms
Google Forms
Favicon of Windshift

Windshift

Self-hosted project management with boards and test tracking

  • Stars

    94

  • Last commit

    12 hours ago

  • License

    AGPL-3.0
Self-hosted, open-source project management tool with boards, milestones, portals, time tracking, and test management on your own infrastructure.

Open Source Alternative to:

Favicon of Linear
Linear
Favicon of Slugy

Slugy

Transform long URLs into beautiful, trackable short links

  • Stars

    92

  • Last commit

    11 days ago

  • License

    MIT
Open-source URL shortener with analytics, custom domains, QR codes, and link-in-bio pages. Create branded short links with detailed tracking insights.

Open Source Alternative to:

Favicon of TinyURL
TinyURL
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