Discover Open Source Replacements
for Proprietary Software
Over 1 million users replaced their proprietary tools with open source software. Discover the best alternatives and join the movement.
Popular Open Source Projects
High-quality, community-driven, and self-hostable replacements.
AppFlowy
Workspace & NotesThe ultimate open-source alternative to Notion. You are in charge of your data and customizations.
100% data control, Offline mode, Built with Flutter & Rust
Outline
Workspace & NotesA fast, collaborative, knowledge base for your team built on React and Node.js.
Markdown support, Team collaboration, API access
Listmonk
Email MarketingHigh performance, self-hosted newsletter and mailing list manager with a modern dashboard.
Fast multi-threaded sender, Rich analytics, Templating engine
ErpNext
CRM100% Open Source ERP. Everything you need to manage your business.
Accounting, HR & Payroll, Manufacturing
Mattermost
Team CommunicationOpen-source, self-hostable Slack alternative designed for privacy-conscious enterprises.
Enterprise-grade security, Custom integrations, File sharing
Zulip
Team CommunicationAn open-source team chat app with an organized threading model.
Topic-based threading, Markdown support, Read receipts
NocoDB
Databases & SpreadsheetsThe Open Source Airtable alternative. Turns any MySQL, PostgreSQL, SQL Server, SQLite & MariaDB into a smart spreadsheet.
Connects to existing databases, Grid/Gallery/Kanban views, Webhooks & APIs
Baserow
Databases & SpreadsheetsOpen source no-code database tool and Airtable alternative.
Real-time collaboration, Custom plugins, REST API
Cal.com
SchedulingThe open-source Calendly alternative. You are in control of your events and data.
Webhooks & API, Custom domain, Routing forms
n8n
AutomationFree and open node-based workflow automation tool.
Visual node editor, Custom HTTP requests, Hundreds of integrations
Medusa
E-CommerceThe open-source Shopify alternative. An API-first commerce engine.
Headless architecture, Multi-region support, Custom promotions
WooCommerce
E-CommerceThe most customizable eCommerce platform for building your online business.
WordPress integration, Thousands of plugins, Digital & physical goods
Plausible
AnalyticsSimple and privacy-friendly Google Analytics alternative. No cookie banners required.
< 1KB script, 100% data ownership, GDPR/CCPA compliant
Umami
AnalyticsA simple, fast, privacy-focused alternative to Google Analytics.
Unlimited websites, Event tracking, Real-time data
Coolify
Hosting & DevOpsAn open-source, self-hostable Heroku / Netlify / Vercel alternative.
Deploy any app (Node, Python, PHP, etc), Database provisioning, Automatic SSL
Plane
Project ManagementThe open-source software development tool to manage issues, sprints, and product roadmaps with peace of mind.
Issue tracking, Cycles (Sprints), Modules
Documenso
E-SignaturesThe Open Source DocuSign Alternative. We want to earn your trust by letting you self-host.
Unlimited documents, Custom branding, API access
Formbricks
Forms & SurveysOpen-source Qualtrics & Typeform alternative. Build in-product micro-surveys for free.
In-app surveys, Link surveys, Templates
OhMyForm
Forms & SurveysFree open source alternative to TypeForm, TellForm, or Google Forms.
Form builder, Data export, Customizable themes
Meilisearch
SearchLightning-fast, open-source search engine that fits effortlessly into your apps, websites, and workflow.
Typo-tolerance, Faceted search, Synonyms
Typesense
SearchFast, typo-tolerant, open-source search engine optimized for instant sub-50ms searches.
In-memory performance, Geosearch, Vector search
Supabase
Backend-as-a-ServiceThe open source Firebase alternative. Build in a weekend. Scale to millions.
Postgres database, Authentication, Edge Functions
Appwrite
Backend-as-a-ServiceSecure Open-Source Backend Server for Web, Mobile & Flutter Developers.
Databases, Auth, Storage
Hoppscotch
API DevelopmentOpen source API development ecosystem. A fast, beautiful Postman alternative.
REST & GraphQL, WebSockets, Environments
Bruno
API DevelopmentFast and git-friendly opensource API client, aimed at revolutionizing the status quo represented by Postman.
Stores collections as plain text in Git, No cloud sync forced, Scripting support
Jitsi Meet
Video ConferencingMore secure, more flexible, and completely free video conferencing.
No account needed, Screen sharing, End-to-end encryption
Apache Spark
Data EngineeringUnified engine for large-scale data analytics.
Batch processing, Streaming, Machine Learning
GlitchTip
Error TrackingAn open-source error tracking tool. Compatible with Sentry SDKs.
Error tracking, Uptime monitoring, Sentry SDK compatibility
SuperTokens
AuthenticationOpen source alternative to Auth0 / Firebase Auth / AWS Cognito.
Session management, Social login, Passwordless
Keycloak
AuthenticationOpen Source Identity and Access Management.
Single-Sign On, Identity Brokering, User Federation
People are looking for alternatives to...
Discover open-source replacements for proprietary SaaS and commercial tools.
Notion
Workspace & NotesReplace proprietary and expensive Notion with free, open-source alternatives.
Replaced by AppFlowy, Outline.
Mailchimp
Email MarketingReplace proprietary and expensive Mailchimp with free, open-source alternatives.
Replaced by Listmonk.
Salesforce
CRMReplace proprietary and expensive Salesforce with free, open-source alternatives.
Replaced by ErpNext.
Slack
Team CommunicationReplace proprietary and expensive Slack with free, open-source alternatives.
Replaced by Mattermost, Zulip.
Airtable
Databases & SpreadsheetsReplace proprietary and expensive Airtable with free, open-source alternatives.
Replaced by NocoDB, Baserow.
Calendly
SchedulingReplace proprietary and expensive Calendly with free, open-source alternatives.
Replaced by Cal.com.
Zapier
AutomationReplace proprietary and expensive Zapier with free, open-source alternatives.
Replaced by n8n.
Shopify
E-CommerceReplace proprietary and expensive Shopify with free, open-source alternatives.
Replaced by Medusa, WooCommerce.
Google Analytics
AnalyticsReplace proprietary and expensive Google Analytics with free, open-source alternatives.
Replaced by Plausible, Umami.
Vercel
Hosting & DevOpsReplace proprietary and expensive Vercel with free, open-source alternatives.
Replaced by Coolify.
Linear
Project ManagementReplace proprietary and expensive Linear with free, open-source alternatives.
Replaced by Plane.
DocuSign
E-SignaturesReplace proprietary and expensive DocuSign with free, open-source alternatives.
Replaced by Documenso.
Typeform
Forms & SurveysReplace proprietary and expensive Typeform with free, open-source alternatives.
Replaced by Formbricks, OhMyForm.
Algolia
SearchReplace proprietary and expensive Algolia with free, open-source alternatives.
Replaced by Meilisearch, Typesense.
Firebase
Backend-as-a-ServiceReplace proprietary and expensive Firebase with free, open-source alternatives.
Replaced by Supabase, Appwrite.
Postman
API DevelopmentReplace proprietary and expensive Postman with free, open-source alternatives.
Replaced by Hoppscotch, Bruno.
Zoom
Video ConferencingReplace proprietary and expensive Zoom with free, open-source alternatives.
Replaced by Jitsi Meet.
Databricks
Data EngineeringReplace proprietary and expensive Databricks with free, open-source alternatives.
Replaced by Apache Spark.
Sentry
Error TrackingReplace proprietary and expensive Sentry with free, open-source alternatives.
Replaced by GlitchTip.
Auth0
AuthenticationReplace proprietary and expensive Auth0 with free, open-source alternatives.
Replaced by SuperTokens, Keycloak.