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:EducationMarketing & Customer EngagementCustomer Support & SuccessProject & Work ManagementDocument Management & E-SignaturesCompliance & Risk ManagementForms & SurveysLegalE-commerce PlatformsCollaboration & CommunicationScheduling & Event ManagementHuman Resources (HR)Finance & AccountingCRM & SalesERP & Operations
Real-time usage metering and billing for AI companies
Stars
2,389Last commit
10 hours agoLicense
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:
AI agents that transform merchant risk decisions at scale
Stars
2,445Last commit
11 days agoLicense
Unknown
Reduce fraud, accelerate underwriting, and maintain compliance with AI-driven merchant risk intelligence for PSPs, banks, and fintechs.
Open Source Alternative to:
Sell tickets for events, conferences, and exhibitions
Stars
2,542Last commit
7 hours agoLicense
Unknown
Full-stack ticketing platform covering online shop, point of sale, access control, and hardware for events of any size or industry.
Open Source Alternative to:
Serverless team chat over Tor, no phone number needed
Stars
2,659Last commit
6 days agoLicense
GPL-3.0
Quiet is a peer-to-peer messaging app that syncs messages directly between devices over Tor, with no central server, no phone number required, and no metadata leaks.
Open Source Alternative to:
AI-native CRM/ERP foundation with 80% already built
Stars
1,870Last commit
8 hours agoLicense
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:
Comprehensive open-source HR management solution
Stars
1,461Last commit
12 hours agoLicense
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:
Open-source CRM toolkit for personalized solutions
Stars
1,388Last commit
3 days agoLicense
MIT
Build a customizable CRM that matches your company's vision, designed for developers and loved by end users.
Open Source Alternative to:
Open-source file storage with complete data sovereignty
Stars
1,941Last commit
16 hours agoLicense
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:
Self-hosted email marketing with unlimited everything
Stars
2,175Last commit
7 days agoLicense
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:
Simplify your workflow with offline Kanban boards
Stars
2,067Last commit
2 days agoLicense
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:
Self-hosted CRM with built-in AI chat and agent tools
Stars
1,770Last commit
20 hours agoLicense
AGPL-3.0
Open-source CRM with a built-in AI assistant, 37 MCP tools for external agents, custom fields, role-based permissions, and a REST API. No per-seat pricing.
Open Source Alternative to:
Open-source email marketing for the privacy-conscious
Stars
2,237Last commit
17 days agoLicense
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:
Create custom spaces to chat, game, and connect globally
Stars
1,995Last commit
7 hours agoLicense
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:
Open-source newsletter app billed by emails sent
Stars
1,240Last commit
5 hours agoLicense
AGPL-3.0
Newsletter platform billed by emails sent, not list size, with scheduling, a public website, AI agent access and deliverability tools from $19 a month.
Open Source Alternative to:
Cross-system automation and knowledge base for accounting firms
Stars
1,722Last commit
5 months agoLicense
Unknown
Connects client data across tools, automates recurring accounting workflows, and maintains a self-updating knowledge base with human approval controls.
Secure collaboration platform with end-to-end encryption
Stars
2,555Last commit
10 months agoLicense
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:
Transform team email into efficient collaborative workflows
Stars
1,760Last commit
8 months agoLicense
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:
Flexible billing infrastructure for modern SaaS
Stars
1,336Last commit
10 days agoLicense
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:
Open-source feedback management for product teams
Stars
1,132Last commit
14 hours agoLicense
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:
Schedule posts to every major social network, self-hosted
Stars
715Last commit
18 hours agoLicense
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:
Agile project management for cross-functional teams
Stars
859Last commit
21 days agoLicense
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:
A delightfully rich and dynamic link-in-bio.
Stars
798Last commit
21 days agoLicense
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:
AI-native support infrastructure for modern SaaS
Stars
736Last commit
1 month agoLicense
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:
Beautiful Kanban boards with seamless payment integration
Stars
661Last commit
2 months agoLicense
MIT
Organize projects with intuitive Kanban boards, powered by Supabase backend and Stripe payment processing for complete project management workflow.
Open Source Alternative to:
Your content engine for growing on Twitter at scale
Stars
770Last commit
10 months agoLicense
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:
A verified workspace where AI agents store and build knowledge
Stars
544Last commit
13 hours agoLicense
MIT
Busabase gives AI agents a shared database, knowledge base, and skills registry where every proposed change goes through human review before becoming canonical data.
Open Source Alternative to:
Open source company management for high-performance startups
Stars
588Last commit
3 days agoLicense
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:
Messaging SDK with AI agents for web, iOS, and Android
Stars
550Last commit
9 hours agoLicense
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:
Real-time work and project management platform
Stars
589Last commit
8 hours agoLicense
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:
Open source financial infrastructure for modern businesses
Stars
529Last commit
25 days agoLicense
MIT
Build custom financial flows and integrate with any provider using Formance's agnostic platform
Open Source Alternative to:
Simplify project management for developers
Stars
458Last commit
8 days agoLicense
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:
End-to-end encrypted collaborative document editor
Stars
445Last commit
8 hours agoLicense
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:
Self-hosted project management with boards and test tracking
Stars
352Last commit
9 hours agoLicense
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:
Open-source ideation tool for product feedback management
Stars
450Last commit
9 days agoLicense
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:
Track your brand's visibility across AI answer engines
Stars
270Last commit
4 days agoLicense
AGPL-3.0
GEO tool that queries ChatGPT, Claude, Gemini, and Perplexity with your buyers' questions, then shows you who gets recommended and how to close the gap.
Open Source Alternative to:
Professional link management for modern teams
Stars
343Last commit
28 days agoLicense
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:
Create stunning forms with AI-powered builder and analytics
Stars
355Last commit
5 months agoLicense
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:
Track and improve your brand's visibility in AI search
Stars
148Last commit
8 hours agoLicense
MIT
Monitors how your brand appears across ChatGPT, Perplexity, Google AI Overviews, and other AI platforms, then turns those insights into prioritized content and optimization actions.
Open Source Alternative to:
Open-source changelog & roadmap platform for teams
Stars
301Last commit
8 months agoLicense
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:
Track your brand's presence in AI-generated answers
Stars
221Last commit
15 days agoLicense
MIT
Runs prompts through ChatGPT, Perplexity, Gemini, Claude, and Google AI Overview interfaces via browser automation, then analyzes captured responses and citations with a model endpoint you configure.
Open Source Alternative to:
Track and improve your brand's visibility in AI answers
Stars
186Last commit
2 days agoLicense
MIT
Tracks how often AI tools like ChatGPT, Claude, and Perplexity mention or cite your brand, then fixes the gaps through AEO strategy and content work.
Open Source Alternative to:
Cut billing costs with open-source subscription management
Stars
233Last commit
8 months agoLicense
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:
Openlane – Open-source, developer-first platform for automated compliance, risk management, and built-in Trust Center.
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Stellar Hosted
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