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, scalable chat server for modern applications
Stars
158Last commit
4 days agoLicense
GPL-3.0
Open source chat server with end-to-end encryption, clustering support, and comprehensive messaging features for building real-time communication apps
Open Source Alternative to:
Secure, scalable server access management for DevOps
Stars
170Last commit
1 month agoLicense
BUSL-1.1
Centralized platform for managing SSH access, enhancing security, and streamlining server administration for DevOps teams.
Create and manage forms with ease
Stars
185Last commit
1 year agoLicense
Apache-2.0
Formizee is an open-source platform for designing, building, and analyzing forms, offering an affordable all-in-one solution
Open Source Alternative to:
Launch your personal website in minutes, no coding required
Stars
226Last commit
4 months agoLicense
AGPL-3.0
Free site builder to create a personal website with articles, projects, email capture, and analytics. Open source, fast, and beautifully designed.
Open Source Alternative to:
Type-safe feature flags and remote config for developers
Stars
166Last commit
1 year agoLicense
AGPL-3.0
Abby offers open-source, fully typed feature flagging and remote configuration for React and Next.js, with multi-environment testing and debugging tools.
Open Source Alternative to:
Transform documentation with developer-focused simplicity
Stars
113Last commit
5 hours agoLicense
MIT
Create powerful, interactive documentation with hot reloading, TypeScript support, custom components, and built-in API docs generation.
Open Source Alternative to:
Transcribe meetings and voice notes with local AI, no bots required
Stars
88Last commit
4 days agoLicense
MIT
Free, open-source AI note-taker that transcribes meetings and voice notes locally using Whisper and Parakeet. Works on Mac, Windows, and mobile without invasive bots.
Open Source Alternative to:
Lightweight, accessible product tours built for React developers
Stars
66Last commit
8 hours agoLicense
MIT
Headless React tour library with WCAG 2.1 AA accessibility, TypeScript support, and pre-styled components. Under 8KB gzipped with full customization control.
Open Source Alternative to:
Privacy-first analytics you own completely
Stars
88Last commit
3 days agoLicense
MIT
Self-hosted or managed web analytics with zero external dependencies. Cookie-free tracking, full data sovereignty, and single binary deployment for organizations that own their data.
Open Source Alternative to:
Transform long URLs into beautiful, trackable short links
Stars
90Last commit
3 days agoLicense
MIT
Open-source URL shortener with analytics, custom domains, QR codes, and link-in-bio pages. Create branded short links with detailed tracking insights.
Open Source Alternative to:
Privacy-friendly web analytics for data-driven decisions
Stars
131Last commit
7 months agoLicense
AGPL-3.0
Prisme offers customizable, GDPR-compliant web analytics with real-time insights, unlimited data retention, and bot filtering.
Open Source Alternative to:
Free, self-hosted personal finance app for long-term planning
Stars
108Last commit
6 hours agoLicense
MIT
YAFFA is a powerful, open-source budget app for managing expenses, budgets, and investments with secure self-hosting.
Open Source Alternative to:
Self-hosted uptime monitoring that runs on your hardware, not their servers
Stars
75Last commit
24 days agoLicense
MIT
Deploy your own uptime and performance monitoring with HTTP/ICMP checks, multi-region probes, and custom status pages. MIT licensed, runs on minimal hardware.
Open Source Alternative to:
Self-hosted CRM for business development teams
Stars
72Last commit
4 days agoLicense
MIT
Pipeline management, deal workspace, contacts, and two-way Gmail for BD teams. Runs on your own infrastructure, MIT licensed, no per-seat fees.
Open Source Alternative to:
Organize and access your bookmarks seamlessly in the cloud
Stars
74Last commit
1 month agoLicense
AGPL-3.0
Cloud-based bookmark manager that lets you save, categorize, and access your web favorites from any device with smart organization features
Open Source Alternative to:
Markdown that mounts real applications
Stars
67Last commit
1 month agoLicense
MIT
Markdown Document with Mounted Applications, the open-source format that turns AI responses into interactive documents. Forms, tables, approval gates and charts render straight from the chat, no custom UI per use case.
Open Source Alternative to:
Code-first email platform that deploys to your AWS
Stars
59Last commit
7 hours agoLicense
AGPL-3.0
Build email templates as React components and automations in TypeScript. Deploy to your AWS account with SES integration. Marketing teams edit content without code.
Open Source Alternative to:
Securely save and access your favorite links across devices
Stars
106Last commit
5 months agoLicense
MIT
A privacy-focused bookmark manager that encrypts your saved links, allowing you to access them anytime, anywhere, on any device with complete control.
Open Source Alternative to:
End-to-end encrypted location sharing for groups
Stars
61Last commit
12 days agoLicense
AGPL-3.0
Share your real-time location with family and friends using end-to-end encryption, geofence alerts, travel history, and multi-device tracking.
Open Source Alternative to:
Open-source project management inspired by Basecamp
Stars
71Last commit
1 month agoLicense
AGPL-3.0
A self-hosted project management tool offering task management, file sharing, event tracking, and team collaboration features in an intuitive interface.
Open Source Alternative to:
Build complex automations without code, deploy anywhere with full control
Stars
54Last commit
10 days agoLicense
MIT
Open-source no-code automation platform for logistics, chatbots, and AI agents. Deploy on cloud, self-host, or hybrid with complete data sovereignty and modular workflow design.
Open Source Alternative to:
Capture web pages, text, and images. Find them fast.
Stars
51Last commit
4 days agoLicense
MIT
Private macOS app for saving web pages, text, links, and images locally with full-text search, OCR, and a CLI, no account or cloud required.
Open Source Alternative to:
Email inbox API built for AI agents and workflows
Stars
38Last commit
6 hours agoLicense
MIT
Provides AI agents with real email inboxes via REST API. Create inboxes instantly, send and receive messages, search threads, and handle attachments programmatically.
Self-hosted visual bug reporting with screenshot annotation
Stars
38Last commit
6 days agoLicense
AGPL-3.0
Embeds a lightweight widget into web apps so users can capture screenshots, annotate issues, and submit reports with console logs and browser metadata included.
Open Source Alternative to:
Streamline investor relations and fundraising management
Stars
61Last commit
6 months agoLicense
AGPL-3.0
Open source platform for managing investor updates, KPIs, fundraising pipeline and data rooms. Keep stakeholders informed and organized.
Open Source Alternative to:
AI-powered root cause analysis for on-call alerts, self-hosted and air-gapped
Stars
38Last commit
8 days agoLicense
Apache-2.0
Receive alerts from Grafana, Datadog, and Prometheus with AI-generated root cause analysis. Self-hosted on Kubernetes, fully air-gapped capable, Apache 2.0 licensed.
Open Source Alternative to:
Privacy-focused note-taking made simple and fast
Stars
67Last commit
7 months agoLicense
GPL-2.0
Justnote is a secure note-taking app that lets you easily create and sync notes across devices while maintaining full control of your data.
Open Source Alternative to:
Invisible bot protection that respects user privacy
Stars
33Last commit
11 days agoLicense
MPL-2.0
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
Open Source Alternative to:
Uptime monitoring and public status pages, combined
Stars
33Last commit
3 days agoLicense
AGPL-3.0
Checks websites and APIs every minute from multiple regions, alerts your team on failure, and publishes a live public status page for customers.
Open Source Alternative to:
Secure, encrypted forms with advanced features
Stars
45Last commit
1 month agoLicense
AGPL-3.0
Build end-to-end encrypted forms with enterprise-grade features, no coding required. Protect sensitive data and enhance user trust.
Open Source Alternative to:
Turn user feedback into features that matter
Stars
34Last commit
1 day agoLicense
SSPL-1.0
Collect feedback, prioritize with AI-powered voting, and share transparent roadmaps. Build products users love with automated triage and seamless integration.
Open Source Alternative to:
Self-hosted sticky notes with better organization
Stars
32Last commit
10 days agoLicense
MIT
A self-hosted, open-source note-taking app that keeps the Google Keep sticky-note feel while adding folders, timelines, list views, and import support.
Open Source Alternative to:
Event ticketing with no per-ticket platform fees
Stars
32Last commit
5 hours agoLicense
AGPL-3.0
Sell tickets for £50/year with payments, QR check-in, refunds, reporting, and a hosted booking site. Self-hostable under AGPL-3.0.
Open Source Alternative to:
Privacy-first newsletter platform without tracking
Stars
32Last commit
8 days agoLicense
AGPL-3.0
Create and send newsletters with complete privacy protection. No tracking, no data collection - just simple, clean email delivery with customizable templates and archive sites.
Open Source Alternative to:
AI-powered task management with radical focus
Stars
26Last commit
6 months agoLicense
AGPL-3.0
Open source minimalist task management tool with AI companion that filters noise, automates coordination, and guides teams through complexity with calm focus.
Open Source Alternative to:
Bridge internal workflows with public collaboration
Stars
24Last commit
1 day agoLicense
Unknown
Source-available project management platform with dual views - internal team workspace and public portal for user feedback, voting, and progress tracking.
Open Source Alternative to:
Blogging platform with built-in SEO, themes, and APIs
Stars
17Last commit
5 days agoLicense
AGPL-3.0
Self-hostable blogging platform with a clean editor, zero-config SEO, custom themes, real-time collaboration, and built-in comments and newsletters.
Open Source Alternative to:
Complete website health monitoring and security scanning
Stars
15Last commit
4 months agoLicense
Unknown
Monitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.
Open Source Alternative to:
LLM observability: cost, latency, and traces in one place
Stars
13Last commit
19 hours agoLicense
MIT
Drop-in observability platform for OpenAI, Anthropic, and Gemini that logs every request, tracks costs, traces agent workflows, and flags anomalies and PII.
Open Source Alternative to:
Ask once, get answers across every document
Stars
13Last commit
3 months agoLicense
AGPL-3.0
Upload files, ask questions, and get AI‑backed answers with citations. Compare, synthesize, and export results for teams and polished outputs.
Open Source Alternative to:
Automatically discover hidden subscriptions from your inbox
Stars
11Last commit
15 hours agoLicense
AGPL-3.0
Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.
Open Source Alternative to:
No-code platform to build AI agents and automate support
Stars
15Last commit
9 hours agoLicense
MIT
Build AI chatbots, automate customer support workflows, and connect live agents across web, WhatsApp, email, and voice with a no-code visual designer.
Open Source Alternative to:
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