Microsoft Outlook
2 free alternatives
Top pick:ThunderbirdLicense: Open source
Saves $100 USD a year
Email clients
Read and send email and manage calendars and contacts across accounts.
Paid apps and their free alternatives
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Free email clients
Every free tool in this category, by name.
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3 alternatives
eM Client
Desktop email client with calendar, tasks and contacts for Windows and macOS, free for two accounts.
License: Free tier- Windows
- macOS
- iOS
- Android
Status: Verified- PST: opens only, partial fidelity. Imports PST and OST data files; cannot write PST
- EML: opens and saves, full fidelity
- ICS: opens and saves, full fidelity. Calendars and tasks import from ICS files
This replaces Microsoft Outlook
Proton Mail
Encrypted email service from Proton with open-source apps and a free plan for one address with up to 1 GB of mail storage.
License: Open source- Windows
- macOS
- Linux
- Web
- iOS
- Android
Status: ActiveThis replaces Google Workspace
Thunderbird
Free open-source email client with calendar, tasks and address book, for Windows, macOS, Linux and Android.
License: Open source- Windows
- macOS
- Linux
- Android
Status: Active- EML: opens and saves, full fidelity
- ICS: opens and saves, full fidelity. Import and export of calendar events and tasks
This replaces Microsoft 365 and Microsoft Outlook