eM Client is a full-featured email client with a modern and easy-to-use interface.
Starting from $49.95
Best Outlook CalDav Synchronizer Alternatives ranked by AI · updated May 2025
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Outlook CalDav Synchronizer is a free Outlook plugin that synchronizes events, tasks, and contacts between Outlook and CalDAV/CardDAV servers.
Top 6 Outlook CalDav Synchronizer alternatives
An extension for Mozilla Thunderbird that adds calendar functionality.
Pros
- Open-source
- Cross-platform
- Integration with Thunderbird email client
Cons
- Less feature-rich compared to standalone calendar software
- Requires Thunderbird installation
Apple Calendar is a calendar application for iPhone, iPad, Mac, and iCloud users. It supports recurring birthday events, alerts, contact integration, invitations,...
Pros
- Built into Apple devices and tightly integrated with Contacts
- Provides dependable recurring alerts without another dedicated app
- Offers stronger event and invitation support than Billy Birthday
Cons
- Best experience is limited to users in the Apple ecosystem
- Less specialized for birthday lists and gift-related notes
- Sharing and collaboration are less flexible than Google Calendar in mixed-device groups
Microsoft Outlook is a popular email and calendar software that offers advanced features for managing emails, calendars, tasks, and contacts.
Starting at $69.99/year
Thunderbird is a free and open-source email client that offers easy setup and customization options.
Postbox is an email client for Windows and macOS that focuses on productivity and organization.
Starting from $40
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