OpenAltFinder

De-Microsoft your life

A curated collection of open source alternatives to Microsoft software. Replace Microsoft 365, Azure, SharePoint, OneNote, and Authenticator with privacy-focused, self-hostable alternatives.

Microsoft 365 Microsoft 365

LibreOffice

LibreOffice

A powerful free and open source office suite with word processing, spreadsheets, presentations, and more.

Alternative to:
Microsoft 365Microsoft 365

Microsoft Authenticator Microsoft Authenticator

Open Authenticator

Open Authenticator

Free, open-source cross-platform TOTP authenticator with self-hostable sync backend, built with Flutter.

Alternative to:
Microsoft AuthenticatorMicrosoft Authenticator

Microsoft Azure Microsoft Azure

Olares

Olares

Olares: An Open-Source Personal Cloud to Reclaim Your Data

Alternative to:
Microsoft AzureMicrosoft Azure

Microsoft OneNote Microsoft OneNote

NoteDiscovery

NoteDiscovery

A self-hosted knowledge base for note-taking with markdown support, Zettelkasten methodology, and Docker deployment.

Alternative to:
Microsoft OneNoteMicrosoft OneNote
kuku

kuku

Open-source local-first Markdown workspace for macOS with wiki, AI editing, and encrypted sync.

Alternative to:
Microsoft OneNoteMicrosoft OneNote
HelixNotes

HelixNotes

A fast, privacy-first local markdown note-taking app built with Tauri and SvelteKit. Your notes stay as plain .md files on your device.

Alternative to:
Microsoft OneNoteMicrosoft OneNote

Microsoft SharePoint Microsoft SharePoint

OpenCloud

OpenCloud

Open source platform for file management, sharing, and collaboration — simple and self-hostable.

Alternative to:
Microsoft SharePointMicrosoft SharePoint