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Microsoft 365

Word, Excel, PowerPoint, and Outlook in a tab

Toolora score88Free

Free web apps

Thunderbird

Open-source desktop email from Mozilla

Toolora score88Open source

Free / open source

Proton

Encrypted email, calendar, VPN, and drive

Toolora score90Free

Free Mail

Spec	Microsoft 365	Thunderbird	Proton
Category	Productivity	Productivity	Productivity
Pricing	Free web apps + Microsoft 365 plans	Free / open source	Free Mail + paid Proton Unlimited
Toolora score	88/100	88/100	90/100
Best for	office, docs, spreadsheets, email	email, desktop, open-source, mozilla	email, encryption, vpn, privacy
Top features	·Word, Excel, PowerPoint, Outlook ·OneDrive file storage ·Real-time sharing	·IMAP and POP accounts ·Local mail archive ·Calendar and address book	·Encrypted email ·VPN and password extras ·Calendar and Drive