Find the Best Open Source Alternatives to Popular Software
Browse free, self-hostable alternatives to the tools you rely on every day.
Keycloak
Open-source identity and access management with SSO, OAuth2, OIDC, and SAML support for modern applications.
Auth0
Duplicati
Free, open-source backup software that stores encrypted, incremental backups to cloud storage and remote servers.
Backblaze
Modo
Open-source AI IDE that plans before it codes, using spec-driven development with requirements, design, and task steps.
Cursor
Chronex
Self-hostable social media scheduler for content creators and small teams with distributed job processing.
Buffer
EmDash
A full-stack TypeScript CMS built on Astro and Cloudflare, reimagining WordPress with serverless, type-safe foundations.
WordPress
EasyInvoicePDF
Free browser-based invoice generator with live PDF preview, no sign-up required, and support for 120+ currencies.
FreshBooks
BluFiles
Self-hosted file sharing and management platform with file transfers, pastes, collections, and a REST API.
WeTransfer
WollyCMS
Self-hosted, open-source headless CMS built specifically for Astro.js with a block-based page builder.
Contentful
Excalidraw
Open-source virtual whiteboard for creating hand-drawn style diagrams and sketches.
Miro
stonks
Terminal-based stock market visualizer that displays real-time stock graphs directly in your terminal.
TradingView
OpenBB
Open-source financial data platform for analysts, quants, and AI agents — a free alternative to Bloomberg Terminal.
Bloomberg Terminal
Fider
Open source customer feedback platform to collect, organize, and prioritize feature requests from users.
UserVoice