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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Fast, minimal VPN built on modern cryptography
Stars
727Last commit
5 months agoLicense
GPL-2.0
VPN protocol that runs inside the Linux kernel, using public-key cryptography to create encrypted tunnels across UDP with minimal configuration.
Open Source Alternative to:
Build complete web apps with integrated graph database
Stars
828Last commit
3 days agoLicense
Unknown
Open-source low-code platform combining Neo4j graph database, visual schema editor, automatic REST APIs, and page rendering in one self-hosted environment.
Visual website builder and CMS you can self-host
Stars
324Last commit
2 days agoLicense
MIT
Build, manage, and host custom websites with a visual drag-and-drop builder and CMS. Self-host free or use managed cloud hosting.
Open Source Alternative to:
Your content engine for growing on Twitter at scale
Stars
769Last 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:
Track games, movies, anime, manga, and books in one place
Stars
586Last commit
7 days agoLicense
MIT
Cross-platform collection manager for retro games, movies, TV shows, anime, manga, visual novels, and books with tier lists, visual boards, and import/export.
Open Source Alternative to:
Monitor, manage, and communicate service status effortlessly
Stars
988Last commit
2 years agoLicense
MIT
A powerful open-source status page system for real-time incident tracking, maintenance updates, and transparent communication with users.
Open Source Alternative to:
Real-time fraud detection and AML compliance engine
Stars
615Last commit
7 days agoLicense
Elastic-2.0
An open-source platform that enables fintech companies to monitor transactions and user activity, detect suspicious behaviors, and automate fraud prevention in real-time.
Open Source Alternative to:
Build and deploy AI agents through visual workflows
Stars
558Last commit
15 days agoLicense
Apache-2.0
Create powerful AI agents using an intuitive node-based interface that connects multiple LLMs and data sources for automated documentation and development workflows.
Take control of your finances, paycheck by paycheck
Stars
687Last commit
7 hours agoLicense
FSL-1.1-MIT
Manage your money confidently with monetr, putting aside what you need and spending what you want
Open Source Alternative to:
S3-compatible object storage built with Swift
Stars
564Last commit
26 days agoLicense
Apache-2.0
Self-hostable, Apache 2.0-licensed object storage with S3 compatibility, a built-in web console, and horizontal scaling from single node to sharded cluster.
Open Source Alternative to:
A verified workspace where AI agents store and build knowledge
Stars
506Last commit
3 days 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:
Complete password control, zero cloud dependency
Stars
538Last commit
2 months agoLicense
Apache-2.0
Open-source password manager with peer-to-peer syncing, local storage, and end-to-end encryption. No cloud servers, complete privacy control across devices.
Open Source Alternative to:
Secure open source email with advanced encryption & AI
Stars
657Last commit
6 hours agoLicense
AGPL-3.0
Open source professional email solution with PGP encryption, JMAP protocol, AI-powered responses, and advanced antispam protection. Control your data privately.
Open Source Alternative to:
Open source company management for high-performance startups
Stars
585Last commit
18 hours 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
10 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
588Last commit
3 days 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:
Visual regression testing for seamless UI development
Stars
638Last commit
22 hours agoLicense
MIT
Automate visual testing, catch UI bugs early, and collaborate effortlessly with your team to maintain pixel-perfect interfaces.
Open Source Alternative to:
Federated short videos without corporate control
Stars
458Last commit
20 hours agoLicense
AGPL-3.0
Open-source, decentralized short-video platform that gives creators control. No ads, no lock-in, built on ActivityPub for true community ownership.
Open Source Alternative to:
Open-source AI browser for intelligent web automation
Stars
512Last commit
7 months agoLicense
BSD-3-Clause
Privacy-focused AI browser with intelligent agents for research, analysis, and workflow automation. Features unified memory, compliance guardrails, and seamless integrations.
Open Source Alternative to:
Open-source CMS for text-driven websites
Stars
619Last commit
25 days agoLicense
MIT
Create manuals, documentation, and websites with this markdown-based content management system, with options for ebook conversion.
Open Source Alternative to:
Craft AAA web apps that delight your users
Stars
491Last commit
19 hours agoLicense
Apache-2.0
Visual web development engine combining design and development tools. Build immersive, interactive web experiences with component-based framework, real-time collaboration, and powerful visual editor.
Open Source Alternative to:
Open source financial infrastructure for modern businesses
Stars
529Last commit
20 days agoLicense
MIT
Build custom financial flows and integrate with any provider using Formance's agnostic platform
Open Source Alternative to:
Open-source GraphQL federation platform
Stars
484Last commit
12 hours agoLicense
MIT
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs
Open Source Alternative to:
Self-hostable image and video delivery with URL transforms
Stars
411Last commit
11 days agoLicense
AGPL-3.0
Upload, transform, and deliver images and videos via a REST API and URL parameters, using your own S3-compatible storage. Cloudinary-compatible syntax, no vendor lock-in.
Open Source Alternative to:
AI governance made simple, secure, and compliant
Stars
363Last commit
7 hours agoLicense
AGPL-3.0
Open-source AI governance platform helping teams meet regulatory standards like EU AI Act and ISO 42001. Monitor model performance, manage risks, and maintain compliance with enterprise-grade security.
Open Source Alternative to:
Inspect, debug, and replay BullMQ queues visually
Stars
451Last commit
5 months agoLicense
MIT
Desktop app and embeddable dashboard for BullMQ that shows live queue metrics, job runs, FlowProducer graphs, and scheduler status without touching Redis directly.
Open Source Alternative to:
Simplify project management for developers
Stars
458Last commit
4 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:
Simple, powerful web & product analytics for user insights
Stars
393Last commit
1 day agoLicense
AGPL-3.0
Privacy-focused analytics platform combining web and product insights. Track user journeys, create funnels, and understand behavior with GDPR compliance and no cookies by default.
Open Source Alternative to:
End-to-end encrypted collaborative document editor
Stars
442Last commit
7 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:
Web3 writing platform for content creators and crypto enthusiasts
Stars
488Last commit
22 hours agoLicense
MIT
Sigle is a secure, open-source platform for Web3 writers to create, publish, and monetize content on the Bitcoin blockchain.
Open Source Alternative to:
Simple content management for modern sites
Stars
384Last commit
20 hours agoLicense
AGPL-3.0
A headless CMS designed for blogs, changelogs, and articles. Features intuitive editor, team collaboration, media management, and API integration.
Open Source Alternative to:
Real-time event tracking and response for tech products
Stars
472Last commit
13 days agoLicense
AGPL-3.0
Track critical events, receive instant notifications, and respond to product activities with customizable webhooks and action buttons
Open Source Alternative to:
Self-hosted project management with boards and test tracking
Stars
343Last commit
22 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:
Unified API, event, and AI agent management platform
Stars
459Last commit
6 hours agoLicense
Apache-2.0
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise security and 4x faster gateway performance.
Open Source Alternative to:
Open-source ideation tool for product feedback management
Stars
450Last commit
5 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:
Fast, secure, and privacy-focused web browsing
Stars
407Last commit
9 hours agoLicense
MPL-2.0
Midori Browser is a lightweight, fast, and secure browser that protects users' privacy, available for Windows, Linux, and Android.
Open Source Alternative to:
Professional link management for modern teams
Stars
343Last commit
24 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:
Self-hosted AI coding agent that opens real PRs
Stars
286Last commit
7 hours agoLicense
FCL-1.0
Source-available, self-hosted AI coding agent that connects to your repo, tools, and chat to investigate issues and open reviewable PRs on your own infrastructure.
Open Source Alternative to:
Track coding time across 70+ editors, completely free
Stars
213Last commit
6 hours agoLicense
MIT
Free, open-source coding time tracker compatible with VS Code, JetBrains IDEs, vim, emacs and more. No limits, no paywalls - your data stays yours forever.
Open Source Alternative to:
Track your brand's visibility across AI answer engines
Stars
270Last commit
6 hours 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:
Low-code and no-code platform for business apps
Stars
387Last commit
1 day agoLicense
AGPL-3.0
Full-stack open source platform combining no-code and low-code studios to build, deploy, and integrate web, mobile, and desktop business applications.
Open Source Alternative to:
Anonymous publishing with no accounts, tracking, or logins
Stars
319Last commit
2 days agoLicense
Unlicense
Self-hosted platform for publishing text anonymously. Write, get a link, share it. No accounts, no tracking, no edits after posting.
Open Source Alternative to:
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