Open Source Alternatives to Popular Software
Over 1 million users replaced their proprietary tools with open source software. Discover the best alternatives and join the movement.
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Secure password management for teams
Stars
6,142Last commit
12 days agoLicense
AGPL-3.0
Open source password manager focused on security, collaboration and privacy for organizations
Open Source Alternative to:
Simulation-based testing and evaluation for AI agents
Stars
4,886Last commit
9 hours agoLicense
Apache-2.0
Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.
Open Source Alternative to:
Pay per email sent, not for contact storage
Stars
4,699Last commit
20 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
5,964Last commit
8 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:
Flexible eCommerce platform for brands that stand out
Stars
5,336Last commit
4 days agoLicense
BSD-3-Clause
Open-source eCommerce platform offering customization, scalability and enterprise-grade features for brands of all sizes
Open Source Alternative to:
Modern desktop accounting made simple and free
Stars
4,992Last commit
9 days 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:
Privacy-first browser built for power users
Stars
6,319Last commit
6 days agoLicense
Unknown
Firefox-based browser with built-in ad blocking, oblivious DNS, zero telemetry, tree-style tabs, and no AI features sending your data anywhere.
Open Source Alternative to:
Comprehensive analytics for data-driven decisions
Stars
5,908Last commit
14 hours agoLicense
Other
All-in-one analytics platform for mobile, web, and desktop apps. Track user behavior, monitor performance, and optimize your product.
Open Source Alternative to:
Open-source CRM that puts simplicity and control first
Stars
3,617Last commit
20 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:
Spreadsheet-like interface for PostgreSQL databases
Stars
5,138Last commit
1 day agoLicense
GPL-3.0
A self-hosted tool that provides an intuitive, spreadsheet-style interface for viewing, editing, and querying PostgreSQL databases without technical expertise.
Open Source Alternative to:
Navigate anywhere with detailed offline maps and GPS
Stars
6,046Last commit
11 hours agoLicense
Unknown
Comprehensive offline navigation app with detailed maps, turn-by-turn guidance, and specialized routing for hiking, cycling, and walking worldwide.
Open Source Alternative to:
Enterprise workplace AI with data you own and control
Stars
3,784Last commit
9 hours agoLicense
Apache-2.0
Self-hostable enterprise AI platform that unifies business data across apps, powers a knowledge graph for cited answers, and lets teams build AI agents across their stack.
Open Source Alternative to:
Professional video editing without the price tag
Stars
5,758Last commit
9 hours agoLicense
GPL-3.0
Cross-platform non-linear video editor offering professional features for free. Edit videos on Linux, Windows, macOS, and BSD with advanced tools and effects.
Open Source Alternative to:
Powerful observability made simple for developers
Stars
4,494Last commit
11 hours agoLicense
MIT
Logfire offers intuitive observability tools for Python applications, combining logs, profiling, and telemetry in one platform.
Open Source Alternative to:
Professional vector graphics editor for all skill levels
Stars
4,007Last commit
11 hours agoLicense
Other
Cross-platform vector graphics editor with flexible drawing tools, Bezier curves, powerful text handling, and broad file format support for illustrators and designers.
Open Source Alternative to:
Build reliable AI agents with unified tool integration
Stars
4,903Last commit
4 months agoLicense
Apache-2.0
Platform for connecting AI agents to 500+ tools with built-in multi-tenant auth management and granular permissions using either function calling or a unified MCP server
Open Source Alternative to:
Effortlessly manage events and sell tickets online
Stars
4,037Last commit
8 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 time tracking for teams and projects
Stars
5,048Last commit
1 day 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:
Effortless group scheduling for seamless collaboration
Stars
5,277Last commit
20 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:
Open-source data integration for modern stacks
Stars
5,095Last commit
16 hours agoLicense
MIT
Collect, transform, and sync data across your entire infrastructure with a flexible, code-based approach to data integration.
Open Source Alternative to:
Self-hosted team workspace with chat, docs, and databases
Stars
5,152Last commit
6 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:
Free open-source appointment booking for any business
Stars
4,396Last commit
4 days 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:
Open source modular logistics platform for faster app development
Stars
3,947Last commit
16 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:
Build powerful websites with the open-source CMS
Stars
4,293Last commit
17 hours agoLicense
GPL-2.0
A flexible and extensible content management system for creating dynamic websites and digital experiences
Open Source Alternative to:
Stateful AI agents that remember, learn, and improve over time
Stars
3,469Last commit
9 hours agoLicense
Apache-2.0
Build persistent AI agents with continuous memory, scheduled tasks, and multi-channel communication via Slack, Discord, and Telegram, using your own API keys.
Open Source Alternative to:
Craft flexible, powerful websites with ease
Stars
4,901Last commit
9 hours agoLicense
Unknown
A flat-file CMS that combines simplicity and flexibility, empowering developers to build custom websites without database complexity.
Open Source Alternative to:
The definitive self-hosted URL shortener
Stars
5,307Last commit
8 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:
Build powerful backends without leaving your browser
Stars
6,845Last commit
2 years agoLicense
Apache-2.0
A low-code platform for creating robust backends, complete with a spreadsheet UI for easy data management and custom functions.
Open Source Alternative to:
Deploy apps instantly with git push - open source alternative
Stars
4,757Last commit
7 months agoLicense
MIT
Open source deployment platform that deploys apps directly from GitHub with zero-downtime, real-time logs, preview URLs, and support for Python, Node.js frameworks.
Open Source Alternative to:
Self-hosted AI agents that do real work on your machine
Stars
3,026Last commit
8 hours agoLicense
Apache-2.0
Run persistent AI bots that sign into your tools, complete tasks autonomously, and ask for approval when needed. Your keys, your model, your infrastructure.
Open Source Alternative to:
Feature-rich backend that runs anywhere you need it
Stars
3,765Last commit
5 days agoLicense
Apache-2.0
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.
Open Source Alternative to:
A spreadsheet engine you can embed, self-host, or run in the browser
Stars
4,176Last commit
9 hours agoLicense
Apache-2.0
IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.
Open Source Alternative to:
System-wide ad-blocking and privacy protection, no extensions needed
Stars
4,241Last commit
16 hours agoLicense
MIT
Free, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.
Open Source Alternative to:
Lightweight distributed storage for self-hosting
Stars
4,599Last commit
2 days agoLicense
AGPL-3.0
Self-contained distributed object storage with S3 API compatibility. Runs on minimal hardware, replicates data across 3 zones for maximum resilience.
Open Source Alternative to:
Open-source platform for collecting and prioritizing feedback
Stars
4,549Last commit
9 hours 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 growth platform for customer-centric teams
Stars
4,090Last 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
4,567Last commit
17 hours 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:
Browser and notebook combined with local-first AI
Stars
3,581Last commit
1 month agoLicense
Apache-2.0
A browser that doubles as a personal notebook, letting you research, summarize, and take notes on web pages, PDFs, and videos without switching apps.
Open Source Alternative to:
Open source security automation platform for builders
Stars
3,819Last commit
9 hours agoLicense
AGPL-3.0
Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.
Open Source Alternative to:
Secure, policy-based access control for modern applications
Stars
4,598Last commit
17 hours agoLicense
Apache-2.0
A scalable authorization layer that provides fine-grained access control through externalized policies, enabling secure and flexible permissions management.
Open Source Alternative to:
Open-source ticketing system for streamlined support
Stars
3,397Last commit
13 hours 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:
Git-native feature management for developers
Stars
4,912Last commit
1 day agoLicense
GPL-3.0
A feature flag platform that integrates with Git workflows, enabling developers to manage features directly in their codebase.
Open Source Alternative to:
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