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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Flexible CMS for custom digital experiences
Stars
3,601Last commit
11 hours agoLicense
Unknown
Build custom websites with a user-friendly CMS that puts content first. Features flexible architecture, GraphQL API, and powerful ecommerce capabilities.
Open Source Alternative to:
Professional raw photo processing made free and powerful
Stars
4,129Last commit
9 days agoLicense
GPL-3.0
Free, cross-platform raw image processor with 32-bit floating point engine, advanced demosaicing algorithms, and professional-grade editing tools for photographers.
Open Source Alternative to:
Convert wearable data into actionable health insights with open algorithms
Stars
2,395Last commit
10 hours agoLicense
MIT
Self-hosted health intelligence platform with open algorithms, AI reasoning engine, and zero per-user fees. Connect Apple Health, Whoop, Garmin, Oura, and more.
Open Source Alternative to:
Organize thousands of photos with ease
Stars
3,844Last commit
4 hours agoLicense
GPL-2.0
Open source photo management software for organizing, sharing and managing large photo libraries. Perfect for teams, organizations and individuals.
Open Source Alternative to:
Transform any TV into professional digital signage
Stars
3,653Last commit
17 hours agoLicense
Unknown
Free open-source digital signage software that turns Raspberry Pi or old PCs into powerful display solutions. Manage images, videos, and web content easily.
Open Source Alternative to:
Group chat for friends and communities, without the baggage
Stars
3,251Last commit
3 hours 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
2,985Last commit
17 hours agoLicense
AGPL-3.0
Simplify asset tracking, boost productivity, and gain real-time insights with our user-friendly, open-source inventory solution.
Open source modular logistics platform for faster app development
Stars
2,531Last commit
4 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:
Self-hosted social media management without limits
Stars
3,539Last 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:
Powerful and user-friendly web hosting control panel
Stars
3,043Last commit
12 days agoLicense
Unknown
aaPanel simplifies Linux server management with one-click installations, intuitive interface, and comprehensive tools for websites, databases, and more.
Open Source Alternative to:
Open-source customer communication platform
Stars
3,561Last 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
10 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:
Monitor, debug, and scale LLM applications with ease
Stars
2,716Last commit
12 hours agoLicense
Apache-2.0
Open-source observability platform for GenAI and LLM applications. Real-time monitoring, distributed tracing, prompt management, and AI model evaluation built on OpenTelemetry.
Open Source Alternative to:
Secure, decentralized cloud storage for your data
Stars
3,277Last commit
18 hours agoLicense
AGPL-3.0
Storj offers a distributed cloud storage platform with enhanced security, global performance, and significant cost savings compared to traditional providers.
Open Source Alternative to:
Get instant answers from your company knowledge
Stars
3,042Last commit
8 days agoLicense
Apache-2.0
AI-powered search and RAG platform that connects to 100+ enterprise tools without data migration. Deploy securely on-premises with any LLM.
Open Source Alternative to:
Fast and beautiful launcher for quick access to apps and tools
Stars
3,077Last commit
6 days agoLicense
MIT
A modern macOS launcher that provides instant access to applications, utilities, and system functions through an elegant and efficient interface.
Open Source Alternative to:
Zero-Trust VPN with built-in 2FA/MFA and SSO capabilities
Stars
2,809Last commit
3 hours agoLicense
Unknown
Enterprise-grade open source VPN solution combining WireGuard with mandatory 2FA/MFA and integrated OpenID Connect SSO for secure remote access
Open Source Alternative to:
Open-source customer engagement platform for automation
Stars
2,913Last 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:
Visual website builder for effortless web design
Stars
2,308Last commit
1 day agoLicense
MIT
Frappe Builder is an open-source, low-code website builder that enables users to create beautiful, responsive websites with an intuitive visual interface.
Open Source Alternative to:
Next-Gen CAPTCHA and Spam Protection, GDPR compliant
Stars
2,696Last commit
6 days agoLicense
MIT
ALTCHA offers cutting-edge spam and abuse protection for websites and apps, with privacy-friendly CAPTCHA alternatives designed for GDPR compliance.
Open Source Alternative to:
Self-hosted home automation without the cloud
Stars
3,156Last commit
3 hours agoLicense
Apache-2.0
Privacy-first home automation platform that runs locally on your hardware, supports Zigbee, Matter, and MQTT, and lets you automate your home without coding.
Open Source Alternative to:
Free, open-source visual website builder for designers
Stars
2,936Last commit
3 days agoLicense
AGPL-3.0
An online tool for visually creating static sites with dynamic data. With the free/libre spirit of internet, together.
Open Source Alternative to:
Smart task management for individuals and families
Stars
2,502Last commit
6 days 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:
Modern command-line HTTP client for the API era
Stars
4,029Last commit
1 year agoLicense
BSD-3-Clause
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
Open Source Alternative to:
Decentralized social network for book lovers and readers
Stars
2,772Last commit
1 day agoLicense
Unknown
Join a federated social reading platform where you can track books, write reviews, discover recommendations from friends, and connect with trusted reading communities.
Open Source Alternative to:
Create engaging product tours and user onboarding experiences
Stars
2,285Last commit
3 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
2,261Last commit
4 days agoLicense
MIT
Automate subscriptions and manage payments with a flexible, open-source billing system designed specifically for hosting providers.
Open Source Alternative to:
Create, sell, and manage online courses with full control
Stars
2,197Last commit
7 hours agoLicense
AGPL-3.0
Open-source LMS for building and selling courses with a block-based editor, built-in payments, AI tools, analytics, and white-labeling. Self-host or use the cloud.
Open Source Alternative to:
AI agents that transform merchant risk decisions at scale
Stars
2,426Last commit
3 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:
Open-source personal finance management tool
Stars
2,918Last commit
4 months agoLicense
GPL-3.0
Self-hosted alternative to Mint and YNAB for budgeting and building wealth while maintaining full control of your financial data.
Open Source Alternative to:
Create beautiful images of your code
Stars
2,345Last commit
18 hours agoLicense
MIT
Turn your code into beautiful images. Choose from a range of syntax colors, hide or show the background, and toggle between a dark and light window.
Blazing-fast API gateway with linear scalability
Stars
2,668Last commit
5 days agoLicense
Apache-2.0
High-performance, stateless API gateway built for microservices. Handle 80K+ requests/second with transparent pricing and enterprise-grade reliability.
Open Source Alternative to:
Get audit-ready for SOC 2, ISO 27001, HIPAA, and GDPR
Stars
1,893Last commit
16 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:
Open canvas for designing and building web apps
Stars
2,620Last commit
4 days agoLicense
Apache-2.0
Design and build web applications on an open canvas with AI-powered tools, Figma integration, pixel drawing, and a modular SDK built for extensibility.
Open Source Alternative to:
Self-host your digital life with ease
Stars
2,968Last commit
1 day agoLicense
AGPL-3.0
Install and maintain your own server with minimal technical knowledge. Host websites, email, cloud storage, social networks, and more for complete digital independence.
Open Source Alternative to:
Design, prototype, and test user experiences with ease
Stars
2,689Last commit
2 days agoLicense
GPL-3.0
Quant-UX is an open-source tool for creating interactive prototypes, conducting user tests, and analyzing results to improve UX design.
Open Source Alternative to:
Route GenAI traffic with confidence using open source
Stars
1,953Last commit
14 hours agoLicense
Apache-2.0
Open source gateway built on Envoy for routing application traffic to GenAI services. Supports 16+ LLM providers including OpenAI, Anthropic, AWS Bedrock.
Open Source Alternative to:
Self-hosted email platform with visual editor & analytics
Stars
2,073Last commit
11 hours 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:
Free DNS management and URL shortening platform
Stars
2,280Last 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
2,640Last commit
18 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:
Complete IT infrastructure monitoring made simple
Stars
2,348Last commit
3 hours agoLicense
GPL-2.0
Monitor your entire IT infrastructure with 2,000+ plugins, automated discovery, and scalable architecture. Open source and enterprise solutions available.
Open Source Alternative to:
Data observability for modern data teams
Stars
2,397Last commit
15 hours agoLicense
Apache-2.0
Elementary provides dbt-native data observability to detect issues, understand root causes, and resolve problems quickly in data pipelines.
Open Source Alternative to:
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