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
Pay per email sent, not for contact storage
Stars
4,614Last commit
26 days agoLicense
AGPL-3.0
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:
Powerful helpdesk solution for streamlined customer service
Stars
5,856Last commit
9 hours agoLicense
AGPL-3.0
Zammad is an open-source helpdesk software that centralizes customer communications and helps deliver great service experiences efficiently.
Open Source Alternative to:
Organize, collaborate, and conquer your tasks
Stars
5,099Last commit
9 hours agoLicense
AGPL-3.0
A powerful, open-source task management platform for teams and individuals, offering customizable workflows and seamless integration.
Open Source Alternative to:
Modern desktop accounting made simple and free
Stars
4,891Last commit
3 months agoLicense
AGPL-3.0
A user-friendly desktop accounting software that helps businesses manage invoices, track expenses, and handle bookkeeping with a modern interface.
Open Source Alternative to:
Open-source CRM that puts simplicity and control first
Stars
3,354Last commit
9 hours agoLicense
AGPL-3.0
A flexible and customizable CRM platform for managing contacts, deals, and customer relationships without the complexity or user-based pricing of traditional solutions.
Open Source Alternative to:
Effortlessly manage events and sell tickets online
Stars
3,986Last commit
7 days agoLicense
Unknown
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:
Effortless group scheduling for seamless collaboration
Stars
5,217Last commit
8 hours agoLicense
AGPL-3.0
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:
Self-hosted team workspace with chat, docs, and databases
Stars
5,019Last commit
5 months agoLicense
Apache-2.0
Local-first collaboration platform combining real-time chat, rich text pages, databases, and file management in a single self-hostable workspace.
Open Source Alternative to:
Effortless time tracking for teams and projects
Stars
4,919Last commit
8 hours agoLicense
AGPL-3.0
Open-source time tracking solution for businesses of all sizes. Manage projects, track billable hours, and generate insightful reports.
Open Source Alternative to:
Free open-source appointment booking for any business
Stars
4,329Last commit
10 hours agoLicense
GPL-3.0
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:
The definitive self-hosted URL shortener
Stars
5,223Last commit
14 days agoLicense
MIT
Keep control over all your shortened URLs by serving them under your own domains with this simple yet powerful tool.
Open Source Alternative to:
Comprehensive open-source business management platform
Stars
4,333Last commit
8 hours agoLicense
AGPL-3.0
All-in-one solution for ERP, CRM, HRM, ATS, and project management to streamline your business operations
Open Source Alternative to:
Open-source growth platform for customer-centric teams
Stars
4,068Last commit
9 hours agoLicense
AGPL-3.0
All-in-one solution for marketing, sales, and customer service. Boost engagement, streamline workflows, and drive growth.
Open Source Alternative to:
Open-source helpdesk for seamless customer support
Stars
4,486Last commit
2 days agoLicense
AGPL-3.0
Self-hosted email management system with shared inboxes, automation, and powerful collaboration features for efficient customer support.
Open Source Alternative to:
Open-source platform for collecting and prioritizing feedback
Stars
4,475Last commit
11 days agoLicense
AGPL-3.0
A self-hosted community feedback tool that helps organizations gather, discuss, and prioritize user suggestions and feature requests.
Open Source Alternative to:
Open-source ticketing system for streamlined support
Stars
3,321Last commit
3 days agoLicense
AGPL-3.0
Frappe Helpdesk consolidates customer issues, automates workflows, and empowers self-service to boost agent productivity and customer satisfaction.
Open Source Alternative to:
Automate financial processes for smarter business decisions
Stars
3,846Last commit
11 hours agoLicense
AGPL-3.0
Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.
Open Source Alternative to:
Create powerful forms with ease and flexibility
Stars
3,611Last commit
16 hours agoLicense
AGPL-3.0
A versatile open-source form builder for collecting data, managing submissions, and integrating with your favorite tools.
Open Source Alternative to:
Secure and elegant Matrix client for seamless conversations
Stars
3,848Last commit
6 days agoLicense
AGPL-3.0
Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.
Open Source Alternative to:
Create your own link-in-bio page with 100+ branded buttons
Stars
3,058Last commit
22 days agoLicense
MIT
Open source DIY alternative to Linktree with 100+ branded buttons, multiple themes, and optimized performance. No frameworks or JavaScript required.
Open Source Alternative to:
Your digital identity, beautifully organized
Stars
3,799Last commit
30 days agoLicense
AGPL-3.0
A free, open-source link management platform for creating customizable, self-hosted link pages to showcase your online presence.
Open Source Alternative to:
Create engaging surveys and gather valuable insights
Stars
3,699Last commit
11 hours agoLicense
Unknown
LimeSurvey is a powerful open-source tool for creating customizable online surveys, polls, and questionnaires.
Open Source Alternative to:
Open source ecommerce platform for modern businesses
Stars
3,406Last commit
8 hours agoLicense
MIT
A flexible and customizable ecommerce solution that enables businesses to build responsive online stores with advanced features and automation capabilities.
Open Source Alternative to:
Effortlessly split expenses with friends and roommates
Stars
2,865Last commit
14 hours agoLicense
MIT
A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.
Open Source Alternative to:
Open source agency management tool for streamlined success
Stars
3,148Last commit
9 days agoLicense
AGPL-3.0
Worklenz is a comprehensive project management platform that helps agencies organize tasks, track resources, and boost productivity.
Open Source Alternative to:
Complete customer relationship management made simple
Stars
3,259Last commit
15 hours agoLicense
AGPL-3.0
Open-source CRM software for managing customers, companies, projects and opportunities. Intuitive interface with cloud and self-hosted options available.
Open Source Alternative to:
Group chat for friends and communities, without the baggage
Stars
3,231Last commit
1 day agoLicense
Unknown
Self-hostable group chat with servers, channels, voice, and moderation tools. No ads, no data mining, built under EU privacy law.
Open Source Alternative to:
Effortless inventory management for modern businesses
Stars
2,980Last commit
8 hours agoLicense
AGPL-3.0
Simplify asset tracking, boost productivity, and gain real-time insights with our user-friendly, open-source inventory solution.
Self-hosted social media management without limits
Stars
3,522Last commit
5 months agoLicense
MIT
Create, schedule, and manage social media content from your own server with no subscription fees or usage restrictions.
Open Source Alternative to:
Open source modular logistics platform for faster app development
Stars
2,511Last commit
21 hours agoLicense
AGPL-3.0
Fleetbase is a comprehensive open source logistics suite offering API, TMS, driver and customer apps for streamlined operations and development.
Open Source Alternative to:
Open-source customer communication platform
Stars
3,560Last commit
2 months agoLicense
Unknown
Versatile messaging solution for businesses to engage customers through multiple channels, with AI-powered automation and analytics.
Open Source Alternative to:
Stripe payments, usage tracking, and paywalls in 3 functions
Stars
2,647Last commit
8 hours agoLicense
Apache-2.0
Simplify Stripe integration for AI startups with 3 functions, 0 webhooks. Build pricing plans in 30 minutes with usage tracking, credits, and feature controls.
Open Source Alternative to:
Open-source customer engagement platform for automation
Stars
2,906Last commit
5 months agoLicense
MIT
Dittofeed offers low-code tools for message automation across multiple channels, including powerful segmentation and personalization features.
Open Source Alternative to:
Smart task management for individuals and families
Stars
2,493Last commit
21 hours agoLicense
AGPL-3.0
Organize tasks and chores with intelligent scheduling, fair assignment, and collaboration features. Perfect for families and teams with smart notifications.
Open Source Alternative to:
Create engaging product tours and user onboarding experiences
Stars
2,275Last commit
11 hours agoLicense
AGPL-3.0
Open-source platform for building interactive product tours, tooltips, and in-app guides to improve user engagement and feature adoption without complex coding
Open Source Alternative to:
Modern open-source billing platform for hosting businesses
Stars
2,241Last commit
9 hours agoLicense
MIT
Automate subscriptions and manage payments with a flexible, open-source billing system designed specifically for hosting providers.
Open Source Alternative to:
AI agents that transform merchant risk decisions at scale
Stars
2,423Last commit
9 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:
Get audit-ready for SOC 2, ISO 27001, HIPAA, and GDPR
Stars
1,872Last commit
10 days agoLicense
AGPL-3.0
AI-driven compliance platform that automates evidence collection, policy generation, and continuous monitoring across 580+ integrations for SOC 2, ISO 27001, HIPAA, and GDPR.
Open Source Alternative to:
Free DNS management and URL shortening platform
Stars
2,278Last commit
3 months agoLicense
MIT
WR.DO offers free domain name distribution and short URL generation, built on Cloudflare's infrastructure for reliability and speed.
Open Source Alternative to:
Serverless team chat over Tor, no phone number needed
Stars
2,638Last commit
13 hours 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:
Self-hosted email platform with visual editor & analytics
Stars
2,049Last commit
2 days agoLicense
AGPL-3.0
Free open-source email platform for newsletters and transactional emails. Self-hosted alternative to Mailchimp with visual MJML editor, A/B testing, and analytics.
Open Source Alternative to:
Simplify AWS SES email management with ease
Stars
2,294Last commit
2 months agoLicense
MIT
A comprehensive platform for managing transactional and marketing emails through AWS SES, featuring customer data management, SMS capabilities, and workflow automation.
Open Source Alternative to:
InfluxDB – The purpose-built time series platform for high-velocity ingestion and real-time queries at scale.
Stellar Hosted
Openlane
Docmost