Community-curated · 500+ projects

The modern guide to
open source

Find, compare, and switch to free open source alternatives to proprietary software. Every project reviewed. Every license documented.

500+
Projects
20
Categories
120+
Alternatives
85
Self-Hosted

Find open source alternatives

For every proprietary tool you use, there's a free and open source alternative. Browse replacements for the tools you already know.

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Replace proprietary tools

All alternatives →
Slack
6 open source alternatives →
Notion
9 open source alternatives →
Google Analytics
7 open source alternatives →
Trello
5 open source alternatives →
1Password
4 open source alternatives →
Figma
3 open source alternatives →
Zoom
4 open source alternatives →
Mailchimp
5 open source alternatives →
Dropbox
6 open source alternatives →
Photoshop
4 open source alternatives →

Browse by category

All 20 categories →
💻
Developer Tools
68 projects
 📋
Productivity
42 projects
 💬
Communication
28 projects
 🗄️
Databases
35 projects
 🔧
DevOps & CI/CD
31 projects
 🌍
CMS & Websites
26 projects
 📊
CRM & Business
22 projects
 📈
Analytics
18 projects
 📁
File Storage
15 projects
 🎨
Design & UI
20 projects
 🔒
Security & Auth
24 projects
 ⚡
Automation
19 projects
 📡
Monitoring
16 projects
 🏠
Self-Hosted
85 projects

Featured projects

All 500+ projects →
Nextcloud✓ Verified★ 28K
Self-hosted productivity platform. File sync, calendar, contacts, office suite, and more.
File StorageProductivityAGPL-3.0Self-Hosted
Alternative to: Dropbox, Google DrivePHP
n8n✓ Verified★ 51K
Workflow automation tool. Connect anything to everything with a visual node editor.
AutomationFair-codeSelf-Hosted
Alternative to: Zapier, MakeTypeScript
Plausible✓ Verified★ 21K
Privacy-friendly web analytics. No cookies, GDPR compliant, lightweight script.
AnalyticsAGPL-3.0Self-Hosted
Alternative to: Google AnalyticsElixir
Cal.com✓ Verified★ 33K
Open source scheduling infrastructure. Calendly alternative with full API and self-hosting.
ProductivityAGPL-3.0Self-Hosted
Alternative to: CalendlyTypeScript
Bitwarden✓ Verified★ 16K
Password manager with zero-knowledge encryption. Free for personal use. Self-hostable.
SecurityGPL-3.0Self-Hosted
Alternative to: 1Password, LastPassC#
Mattermost✓ Verified★ 31K
Secure team collaboration platform. Channels, threads, integrations, and playbooks.
CommunicationMIT + EESelf-Hosted
Alternative to: Slack, TeamsGo

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