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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Open-source customer communication platform
Stars
3,575Last commit
3 months agoLicense
Unknown
Versatile messaging solution for businesses to engage customers through multiple channels, with AI-powered automation and analytics.
Open Source Alternative to:
Secure, decentralized cloud storage for your data
Stars
3,282Last commit
8 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:
Fast and beautiful launcher for quick access to apps and tools
Stars
3,150Last commit
9 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:
Visual website builder for effortless web design
Stars
2,395Last commit
8 hours 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:
Zero-Trust VPN with built-in 2FA/MFA and SSO capabilities
Stars
2,849Last commit
9 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 personal finance management tool
Stars
2,927Last commit
12 hours 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:
Next-Gen CAPTCHA and Spam Protection, GDPR compliant
Stars
2,783Last commit
9 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
3,205Last commit
12 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:
Open-source customer engagement platform for automation
Stars
2,970Last commit
6 months agoLicense
MIT
Dittofeed offers low-code tools for message automation across multiple channels, including powerful segmentation and personalization features.
Open Source Alternative to:
Free, open-source visual website builder for designers
Stars
2,989Last commit
12 hours 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
2,597Last commit
2 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:
Create, sell, and manage online courses with full control
Stars
2,302Last commit
16 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:
Route GenAI traffic with confidence using open source
Stars
2,152Last commit
12 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:
Get audit-ready for SOC 2, ISO 27001, HIPAA, and GDPR
Stars
2,004Last commit
4 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:
Modern open-source billing platform for hosting businesses
Stars
2,320Last commit
6 days agoLicense
MIT
Automate subscriptions and manage payments with a flexible, open-source billing system designed specifically for hosting providers.
Open Source Alternative to:
Modern command-line HTTP client for the API era
Stars
4,037Last commit
2 years 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:
Create engaging product tours and user onboarding experiences
Stars
2,313Last commit
14 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:
Decentralized social network for book lovers and readers
Stars
2,790Last commit
3 days 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:
Self-hosted email platform with visual editor & analytics
Stars
2,224Last commit
11 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:
Free DNS management and URL shortening platform
Stars
2,280Last commit
17 days 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:
Blazing-fast API gateway with linear scalability
Stars
2,689Last commit
17 hours 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:
AI agents that transform merchant risk decisions at scale
Stars
2,437Last commit
11 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:
Code with Claude, Codex, Gemini, and more in one workspace
Stars
1,900Last commit
7 hours agoLicense
MIT
Desktop coding workspace that connects to AI subscriptions you already have, with parallel agents, worktrees, one-click PRs, and multi-project management.
Open Source Alternative to:
Open canvas for designing and building web apps
Stars
2,652Last 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:
Create beautiful images of your code
Stars
2,361Last commit
8 days 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.
Self-host your digital life with ease
Stars
2,978Last 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
2,725Last commit
8 hours 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:
Real-time usage metering and billing for AI companies
Stars
2,350Last commit
11 hours agoLicense
Apache-2.0
Open source billing platform that turns events into revenue with real-time metering, usage limits, and flexible pricing. Integrates with Stripe, CRMs, and payment providers.
Open Source Alternative to:
Complete IT infrastructure monitoring made simple
Stars
2,378Last commit
8 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:
Serverless team chat over Tor, no phone number needed
Stars
2,655Last commit
17 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:
Sell tickets for events, conferences, and exhibitions
Stars
2,527Last commit
8 hours agoLicense
Unknown
Full-stack ticketing platform covering online shop, point of sale, access control, and hardware for events of any size or industry.
Open Source Alternative to:
Build privacy-compliant cookie banners with full control
Stars
1,919Last commit
7 hours agoLicense
Apache-2.0
Open source consent management framework for modern web apps. Framework-agnostic, fully customizable, and performance-first with no vendor lock-in.
Open Source Alternative to:
Navigate anywhere offline with complete privacy
Stars
2,116Last commit
8 hours agoLicense
Apache-2.0
Offline navigation app for hiking, biking, and driving. No tracking, no data collection, community-driven maps. Works without internet connection.
Open Source Alternative to:
Turn bare metal into intelligent cloud infrastructure
Stars
2,239Last commit
8 hours agoLicense
Apache-2.0
Transform bare metal servers into a complete cloud platform with REST API for Kubernetes clusters, databases, VMs, and load balancers. Build your own cloud.
Open Source Alternative to:
Powerful, customizable web analytics for your site
Stars
2,688Last commit
11 hours agoLicense
GPL-2.0
Open-source web analytics platform offering comprehensive visitor tracking, customizable dashboards, and data ownership for websites and applications.
Open Source Alternative to:
Comprehensive open-source HR management solution
Stars
1,437Last commit
15 hours agoLicense
LGPL-2.1
Horilla is a free, open-source HRMS that streamlines HR processes, from recruitment to offboarding, with customizable modules.
Open Source Alternative to:
OpenTelemetry observability with traces, logs, and metrics
Stars
1,801Last commit
9 hours agoLicense
Unknown
Observability platform built on OpenTelemetry and ClickHouse. Collect, visualize, and query distributed traces, logs, and metrics, with an MCP server for AI agent diagnostics.
Open Source Alternative to:
Data observability for modern data teams
Stars
2,414Last commit
12 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:
GPU orchestration across clouds, Kubernetes, and on-prem
Stars
2,262Last commit
8 hours agoLicense
MPL-2.0
Unified control plane for AI compute that provisions and schedules GPU workloads across any cloud, Kubernetes cluster, or bare-metal server.
Open Source Alternative to:
AI-native CRM/ERP foundation with 80% already built
Stars
1,786Last commit
8 hours agoLicense
MIT
A modular CRM/ERP framework built on Next.js and TypeScript that encodes hundreds of architectural decisions so dev teams can ship production features in days, not months.
Open Source Alternative to:
Simplify AWS SES email management with ease
Stars
2,307Last commit
4 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:
Business rules engine with AI, visual flows, and audit trails
Stars
2,020Last commit
7 hours agoLicense
MIT
Model business logic in decision tables, visual flows, and natural-language rules. Change rules without deploys, test every path, and run the same engine anywhere.
Open Source Alternative to:
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