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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Self-hosted cloud platform with automated security
Stars
6,188Last commit
9 days agoLicense
Unknown
Complete self-hosting solution with automated maintenance, Smart-Shield protection, anti-DDoS, SSO authentication, and VPN access for secure private cloud management.
Open Source Alternative to:
Self-hosted group chat without recurring subscription fees
Stars
Stars growing over the last 30 days4,806Last commit
4 days agoLicense
MIT
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:
The open-source, affordable email platform
Stars
5,561Last commit
2 days agoLicense
AGPL-3.0
Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.
Open Source Alternative to:
Enterprise monitoring for networks, apps, and infrastructure
Stars
6,525Last commit
1 day agoLicense
AGPL-3.0
Monitors networks, servers, cloud services, IoT, and OT environments with no per-device licensing fees, available self-hosted or as a managed SaaS platform.
Open Source Alternative to:
Intercept, modify, and debug HTTP(S) requests effortlessly
Stars
6,757Last commit
14 hours agoLicense
AGPL-3.0
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
Open Source Alternative to:
Clean your system and free disk space
Stars
Stars growing over the last 30 days7,282Last commit
12 hours agoLicense
GPL-3.0
BleachBit frees disk space & protects privacy by deleting cache, cookies, history & temp files from Firefox, Chrome & more. Open source for Linux/Windows.
Open Source Alternative to:
Feature flags and remote config for rapid deployment
Stars
6,636Last commit
16 hours agoLicense
BSD-3-Clause
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.
Open Source Alternative to:
Organize, collaborate, and conquer your tasks
Stars
Stars growing over the last 30 days5,910Last commit
13 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:
Free, cross-platform video editor that's easy to learn
Stars
6,707Last commit
14 hours agoLicense
GPL-3.0
A free, open-source video editor for Linux, Mac, and Windows with animation, effects, multi-track editing, and 3D title rendering.
Open Source Alternative to:
Secure, scalable API key management for developers
Stars
5,482Last commit
11 hours agoLicense
AGPL-3.0
Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.
Open Source Alternative to:
Open source cloud infrastructure trusted at massive scale
Stars
6,070Last commit
14 hours agoLicense
Apache-2.0
OpenStack manages compute, storage, and networking across VMs, bare metal, and containers via APIs or a dashboard. Trusted by Walmart, China Mobile, and more.
Open Source Alternative to:
Distributed OLAP database for real-time analytics at scale
Stars
6,169Last commit
21 hours agoLicense
Apache-2.0
Sub-second SQL queries on fresh streaming data at petabyte scale, built for high-concurrency user-facing apps and AI agent backends.
Open Source Alternative to:
Secure, encrypted notes for your digital life
Stars
6,688Last commit
15 hours agoLicense
AGPL-3.0
Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.
Open Source Alternative to:
Build scalable authorization in minutes, not months
Stars
5,968Last commit
7 days agoLicense
AGPL-3.0
Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with Google Zanzibar-inspired architecture.
Open Source Alternative to:
Lightweight self-hosted bookkeeping with AI receipt scanning
Stars
Stars growing over the last 30 days5,868Last commit
1 day agoLicense
MIT
A privacy-first personal finance app with two-level accounts, multi-currency support, AI receipt recognition, and broad data import from formats like GnuCash and Firefly III.
Open Source Alternative to:
Continuous web-based localization for global reach
Stars
6,140Last commit
11 hours agoLicense
GPL-3.0
Web-based continuous localization platform with version control integration, quality checks, and clean interface. Used by 2,500+ projects in 165+ countries.
Open Source Alternative to:
Effortless event-driven workflows for modern applications
Stars
6,001Last commit
12 hours agoLicense
SSPL-1.0
Simplify backend processes with event-driven functions, seamless integrations, and powerful debugging tools for developers.
Open Source Alternative to:
Build, automate, and improve AI agents with your team
Stars
4,876Last commit
11 hours agoLicense
MIT
Open-source workspace for building and running AI agents: chat-driven development, scheduling, human-in-the-loop approvals, versioning, and tracing. Self-host or use the cloud.
Open Source Alternative to:
Professional image editing without the price tag
Stars
6,555Last commit
21 hours agoLicense
Unknown
Free, open-source image editor with professional tools for photo manipulation, digital art creation, and graphic design. Cross-platform support.
Open Source Alternative to:
Deploy a professional status page in minutes, no coding required
Stars
5,231Last commit
2 days agoLicense
MIT
Free, open-source status page and uptime monitor with Docker deployment. Track 11 service types, manage incidents, schedule maintenance, and notify subscribers instantly.
Open Source Alternative to:
Privacy-focused analytics without the complexity
Stars
8,035Last commit
8 months agoLicense
MIT
A simple, privacy-first analytics platform that provides valuable website insights without compromising visitor data or requiring cookie consent banners.
Open Source Alternative to:
Open-source CRM that puts simplicity and control first
Stars
Stars growing over the last 30 days3,885Last commit
1 day 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:
Pay per email sent, not for contact storage
Stars
4,767Last commit
5 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:
Simulation-based testing and evaluation for AI agents
Stars
4,999Last commit
11 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:
Build reliable AI agents with unified tool integration
Stars
4,929Last commit
7 days 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:
Full observability for AI agents in production
Stars
4,739Last commit
2 days agoLicense
MIT
Open-source platform for monitoring AI agents: captures traces, surfaces failure patterns, alerts on issues, and helps you verify fixes with automated evals.
Open Source Alternative to:
Terraform automation with pull request workflows
Stars
5,061Last commit
8 days agoLicense
MIT
Open-source CI/CD orchestrator for Terraform with pull request automation, drift detection, and enterprise-grade security. Self-hostable with private runners.
Open Source Alternative to:
Secure password management for teams
Stars
6,198Last commit
10 days agoLicense
AGPL-3.0
Open source password manager focused on security, collaboration and privacy for organizations
Open Source Alternative to:
Powerful helpdesk solution for streamlined customer service
Stars
6,057Last commit
11 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:
Deploy apps instantly with git push - open source alternative
Stars
4,779Last commit
14 hours 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:
Flexible eCommerce platform for brands that stand out
Stars
5,347Last commit
21 hours agoLicense
BSD-3-Clause
Open-source eCommerce platform offering customization, scalability and enterprise-grade features for brands of all sizes
Open Source Alternative to:
Comprehensive analytics for data-driven decisions
Stars
5,925Last commit
12 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:
Privacy-first browser built for power users
Stars
6,337Last commit
3 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:
Enterprise workplace AI with data you own and control
Stars
3,896Last commit
12 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:
Open source modular logistics platform for faster app development
Stars
Stars growing over the last 30 days4,427Last commit
3 days 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:
Professional video editing without the price tag
Stars
Stars growing over the last 30 days5,999Last commit
17 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:
Navigate anywhere with detailed offline maps and GPS
Stars
6,117Last 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:
Spreadsheet-like interface for PostgreSQL databases
Stars
5,167Last commit
20 hours 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:
Powerful observability made simple for developers
Stars
4,526Last commit
13 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
4,020Last commit
16 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:
Effortless group scheduling for seamless collaboration
Stars
5,334Last commit
11 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
5,122Last commit
11 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:
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Stellar Hosted – Managed Open Source software hosting in the EU: secure, compliant, fast.
Openlane
InfluxDB
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